{"product_id":"pfls-1bk-s120m40a","title":"PFLS-1BK-S120M40A - PowerFit 400 A Line Source, L1 (Phase A) Black (NEC - North American)","description":"\u003c!--Combined Shopify product HTML for PFLS-1BK-S120M40A --\u003e\u003cstyle\u003e.kupo-section-title { margin: 1.25rem 0 1rem 0; font-size: 22px !important; font-weight: 700; line-height: 1.3; color: #2C3E50 !important; letter-spacing: 0;}.product-description h3 { color: #2C3E50 !important; font-size: 18px !important; font-weight: bold; margin-top: 1.5rem; margin-bottom: 0.75rem; line-height: 1.35; letter-spacing: 0;}.product-description,.product-description p,.product-description li { color: #222222 !important;}.kupo-faq-seo-block { margin: 3rem 0 0 0; padding: 0; border: 0; background: transparent; box-sizing: border-box;}.kupo-faq-seo-block h2 { margin: 0 0 1.6rem 0; font-size: 22px !important; font-weight: 700; line-height: 1.4; color: #2C3E50 !important;}.kupo-faq-seo-item h3 { margin: 0 0 0.35rem 0; font-size: 17px !important; font-weight: 600; line-height: 1.45; color: #2C3E50 !important;}.kupo-faq-seo-item p { margin: 0; line-height: 1.6; color: #222222 !important;}.kupo-download-section { margin: 2rem 0 0 0; padding: 0; border: 0; background: transparent; box-sizing: border-box;}.kupo-download-section h2 { margin: 0 0 1rem 0; font-size: 22px !important; font-weight: 700; line-height: 1.4; color: #2C3E50 !important;}.kupo-download-link { display: inline-flex; align-items: center; gap: 0.4rem; font-size: 16px !important; line-height: 1.5; color: #111111 !important; font-weight: 600; text-decoration: underline;}\u003c\/style\u003e\u003ch2 class=\"kupo-section-title\"\u003eProduct Description\u003c\/h2\u003e\u003c!-- PowerFit 400 A Line Source Connector (Black) | PFLS-1BK-S120M40A | 2026-03-23 --\u003e\u003cdiv class=\"product-description\" data-sku=\"PFLS-1BK-S120M40A\" data-color=\"Black\"\u003e \u003ch3\u003eOverview\u003c\/h3\u003e \u003cp\u003eEngineered for North American production workflows, the PFLS-1BK-S120M40A delivers the innovation that sets PowerFit apart: a patent-pending key-release pin mechanism for tool-free disconnection. Where traditional connectors demand extra tools and wasted setup time, this Line Source connector's push-and-twist connection with integrated key-release allows rapid disconnect and reconnect cycles - essential for fast-paced touring and event production. NEC-compliant black phase marking ensures instant visual identification on crowded stage decks, while the robust 400 A\/660 A dual-rated design handles everything from monitor systems to main power distribution without compromise.\u003c\/p\u003e \u003ch3\u003eKey Features\u003c\/h3\u003e  \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInnovative Key-Release Pin:\u003c\/strong\u003e Patent-pending mechanism enables fast, tool-free disconnection - no screwdriver or hex key required for standard uncoupling, dramatically reducing changeover time on set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSource interface Design:\u003c\/strong\u003e Distinguished from Line Drain by ergonomic source interface configuration paired with push-and-twist connection for confident mating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass Silver-Plated Contact:\u003c\/strong\u003e Superior conductivity and corrosion resistance for reliable signal integrity across extended touring schedules\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Thermoplastic Housing:\u003c\/strong\u003e Non-conductive, high-impact-resistant material provides electrical safety and physical protection in demanding venue environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eErgonomic Rubber Grip:\u003c\/strong\u003e Textured surface enhances handling comfort and ensures secure grip even with gloved hands\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP67-Rated Sealing:\u003c\/strong\u003e M40 x 1.5 cable gland with rubber bushing guarantees ingress protection in outdoor and damp conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Rated Performance:\u003c\/strong\u003e 400 A\/660 A rating accommodates diverse power distribution configurations\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eStandards\u003c\/h3\u003e \u003cp\u003eTÜV ( Certificate: 1111303479); CE Marking; RoHS Compliant; REACH Compliant; UL94-V0 Flame Rating. Match standards and compliance requirements to the local electrical code before installation.\u003c\/p\u003e \u003ch3\u003eApplications\u003c\/h3\u003e \u003cp\u003eSuitable for live Event Audio \u0026amp; Video Production, touring Sound Systems, stage \u0026amp; Lighting Power Distribution, concert \u0026amp; Festival Infrastructure, mobile Production Trucks, rental \u0026amp; House Power Management, and high-Current Audio Distribution.\u003c\/p\u003e \u003cdiv class=\"product-compatibility\"\u003e  \u003ch3\u003e Compatibility\u003c\/h3\u003e  \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated Amperage:\u003c\/strong\u003e 400 A \/ 660 A dual-rated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Range:\u003c\/strong\u003e 1000 V AC (max) \/ 1500 V DC (max)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable Compatibility:\u003c\/strong\u003e M40 x 1.5 gland accommodates cables with 22 - 33 mm outer diameter; reduction sleeve (R120) available for smaller cables up to 16.50 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMating Standard:\u003c\/strong\u003e Push-and-twist with key-release mechanism (IEC 60320 derivative, proprietary key-release pin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase Marking Standard:\u003c\/strong\u003e NEC (North America)\u003c\/li\u003e\n\u003c\/ul\u003e \u003c\/div\u003e \u003ch3\u003ePhase \/ Wire Color Convention\u003c\/h3\u003e  \u003cdiv style=\"overflow-x: auto; -webkit-overflow-scrolling: touch;\"\u003e\u003ctable style=\"width: 100%; min-width: 540px; border-collapse: collapse; margin: 12px 0; border: 2px solid #999999;\"\u003e\n\u003cthead\u003e\u003ctr\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: left; padding-left: 14px; border: 1px solid #cccccc; border-top: 2px solid #999999; border-left: 2px solid #999999; font-size: 14px; width: 22%;\"\u003eRegion\u003c\/th\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: center; border: 1px solid #cccccc; border-top: 2px solid #999999; font-size: 14px; width: 13%;\"\u003eL1\u003c\/th\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: center; border: 1px solid #cccccc; border-top: 2px solid #999999; font-size: 14px; width: 13%;\"\u003eL2\u003c\/th\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: center; border: 1px solid #cccccc; border-top: 2px solid #999999; font-size: 14px; width: 13%;\"\u003eL3\u003c\/th\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: center; border: 1px solid #cccccc; border-top: 2px solid #999999; font-size: 14px; width: 13%;\"\u003eN\u003c\/th\u003e \u003cth style=\"background-color: #e0e0e0; color: #333333; font-weight: bold; padding: 10px 8px; text-align: center; border: 1px solid #cccccc; border-top: 2px solid #999999; border-right: 2px solid #999999; font-size: 14px; width: 26%;\"\u003eGround\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e \u003ctd style=\"background-color: #f0f0f0; color: #333333; font-weight: bold; font-size: 13px; padding: 6px 8px 6px 14px; text-align: left; border: 1px solid #cccccc; border-left: 2px solid #999999;\"\u003eNA 120\/208 V \u003csup\u003e1\u003c\/sup\u003e\n\u003c\/td\u003e \u003ctd style=\"background-color: #222222; height: 38px; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: # CC0000; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #003399; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #ffffff; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; color: #ffffff; font-weight: bold; font-size: 12px; text-align: center; border: 1px solid #cccccc; border-right: 2px solid #999999;\"\u003eGreen \/ G-Y\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e \u003ctd style=\"background-color: #f0f0f0; color: #333333; font-weight: bold; font-size: 13px; padding: 6px 8px 6px 14px; text-align: left; border: 1px solid #cccccc; border-left: 2px solid #999999;\"\u003eNA 277\/480 V \u003csup\u003e2\u003c\/sup\u003e\n\u003c\/td\u003e \u003ctd style=\"background-color: #8B4513; height: 38px; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: # CC6600; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #DAA520; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #888888; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; color: #ffffff; font-weight: bold; font-size: 12px; text-align: center; border: 1px solid #cccccc; border-right: 2px solid #999999;\"\u003eGreen \/ G-Y\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e \u003ctd style=\"background-color: #f0f0f0; color: #333333; font-weight: bold; font-size: 13px; padding: 6px 8px 6px 14px; text-align: left; border: 1px solid #cccccc; border-left: 2px solid #999999;\"\u003eIEC 60446 \u003csup\u003e3\u003c\/sup\u003e\n\u003c\/td\u003e \u003ctd style=\"background-color: #8B4513; height: 38px; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #222222; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #888888; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #003399; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; color: #ffffff; font-weight: bold; font-size: 12px; text-align: center; border: 1px solid #cccccc; border-right: 2px solid #999999;\"\u003eGreen-Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e \u003ctd style=\"background-color: #f0f0f0; color: #333333; font-weight: bold; font-size: 13px; padding: 6px 8px 6px 14px; text-align: left; border: 1px solid #cccccc; border-left: 2px solid #999999;\"\u003eAU\/NZ Legacy \u003csup\u003e4\u003c\/sup\u003e\n\u003c\/td\u003e \u003ctd style=\"background-color: # CC0000; height: 38px; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #ffffff; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #003399; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #222222; border: 1px solid #cccccc;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; color: #ffffff; font-weight: bold; font-size: 12px; text-align: center; border: 1px solid #cccccc; border-right: 2px solid #999999;\"\u003eGreen-Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e \u003ctd style=\"background-color: #f0f0f0; color: #333333; font-weight: bold; font-size: 13px; padding: 6px 8px 6px 14px; text-align: left; border: 1px solid #cccccc; border-left: 2px solid #999999; border-bottom: 2px solid #999999;\"\u003e China \u003csup\u003e5\u003c\/sup\u003e\n\u003c\/td\u003e \u003ctd style=\"background-color: #DAA520; height: 38px; border: 1px solid #cccccc; border-bottom: 2px solid #999999;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; border: 1px solid #cccccc; border-bottom: 2px solid #999999;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: # CC0000; border: 1px solid #cccccc; border-bottom: 2px solid #999999;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #4682B4; border: 1px solid #cccccc; border-bottom: 2px solid #999999;\"\u003e\u003c\/td\u003e \u003ctd style=\"background-color: #228B22; color: #ffffff; font-weight: bold; font-size: 12px; text-align: center; border: 1px solid #cccccc; border-right: 2px solid #999999; border-bottom: 2px solid #999999;\"\u003eGreen-Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e  \u003cp style=\"font-size: 12px; color: #555555; line-height: 1.6; margin-top: 6px;\"\u003e\u003csup style=\"color: #555; font-weight: bold;\"\u003e1\u003c\/sup\u003e North America 120\/208 V (NEMA \/ NEC)   \u003csup style=\"color: #555; font-weight: bold;\"\u003e2\u003c\/sup\u003e North America 277\/480 V (NEMA \/ NEC)   \u003csup style=\"color: #555; font-weight: bold;\"\u003e3\u003c\/sup\u003e Europe, UK, Australia (current IEC 60446)\u003cbr\u003e\u003csup style=\"color: #555; font-weight: bold;\"\u003e4\u003c\/sup\u003e Australia \/ New Zealand legacy (pre-IEC)   \u003csup style=\"color: #555; font-weight: bold;\"\u003e5\u003c\/sup\u003e China (GB 50303)   \u003cstrong\u003eG-Y\u003c\/strong\u003e = Green-Yellow (earth\/ground)\u003c\/p\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{  \"@context\": \"https:\/\/schema.org\",  \"@type\": \"Product\",  \"name\": \"PFLS-1BK-S120M40A | PowerFit 400 A Line Source, L1 (Phase A) Black (NEC - North American)\",  \"description\": \"KUPO PowerFit 400 A Line Source single-pole connector with black housing for NEC - North American power distribution systems. Source interface, patent key-release pin for safe disconnection, M40 cable gland with sealing bushing, IP67 rated when mated, silver-plated brass contacts, dual-rated 400 A\/660 A, 1000 V AC \/ 1500 V DC maximum, TUV certified.\",  \"brand\": {    \"@type\": \"Brand\",    \"name\": \"KUPO\"  },  \"manufacturer\": {    \"@type\": \"Organization\",    \"name\": \"KUPO CO. LTD\",    \"url\": \"https:\/\/www.kupopower.com\"  },  \"category\": \"Electrical Connectors \u003e Single-Pole Connectors \u003e PowerFit\",  \"sku\": \"PFLS-1BK-S120M40A\",  \"mpn\": \"PFLS-1BK-S120M40A\",  \"color\": \"Black\",  \"material\": \"Thermoplastic, UL94-V0; Brass (silver-plated)\",  \"additionalProperty\": [    {      \"@type\": \"PropertyValue\",      \"name\": \"Current Rating\",      \"value\": \"400 A maximum (120 mm² cable)\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Voltage Rating\",      \"value\": \"1000 V AC, 1500 V DC maximum\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Connector Style\",      \"value\": \"Line \/ inline\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Source \/ Drain\",      \"value\": \"Source\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Color Coding\",      \"value\": \"Black (L1)\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Cable Accommodation\",      \"value\": \"120 mm²; M40 gland + bushing\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Housing Material\",      \"value\": \"Thermoplastic, UL94-V0\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Contact Material\",      \"value\": \"Brass (silver-plated)\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Protection Rating\",      \"value\": \"IP67 when mated\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Compatibility\",      \"value\": \"Major single-pole power connectors\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Certification\",      \"value\": \"CE \/ TUV\"    },    {      \"@type\": \"PropertyValue\",      \"name\": \"Termination\",      \"value\": \"Double set screws, 10.5 N\/meter min.\"    }  ],  \"productID\": \"PFLS-1BK-S120M40A\"}\u003c\/script\u003e\u003csection class=\"kupo-faq-seo-block\" data-product-id=\"PFLS-1BK-S120M40A\" data-category=\"PowerFit 400 A Connectors\"\u003e \u003ch2\u003e Frequently Asked Questions\u003c\/h2\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eWhat is PFLS-1BK-S120M40A and what makes it innovative?\u003c\/h3\u003e  \u003cp\u003ePFLS-1BK-S120M40A is a KUPO PowerFit 400 A line source connector with a black housing, identifying Line 1 (L1) under North America (NEC) conventions. As the source side of an inline cable connection, it features the innovative patent key-release pin that enables tool-free disconnection. The push-and-twist mechanism secures the connection during operation while allowing rapid uncoupling when needed. It is commonly deployed in outdoor music festival applications. When power cables stretch across a rain-soaked festival ground, IP67 protection is not a luxury.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eWhat electrical performance does PFLS-1BK-S120M40A deliver?\u003c\/h3\u003e  \u003cp\u003ePFLS-1BK-S120M40A is rated for 400 amperes continuous with 120 mm² cable, scaling to 660 amperes with 240 mm² cable. The maximum voltage rating is 1000 V AC or 1500 V DC. The silver-plated brass contact achieves a contact resistance of just 0.1 mOhms, significantly reducing resistive heating compared to plain brass contacts at sustained high-current loads. This low resistance is particularly important for L1 circuits carrying continuous phase current.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eWhy choose the black L1 variant (PFLS-1BK-S120M40A) for your installation?\u003c\/h3\u003e  \u003cp\u003eUnder North American NEC conventions, black identifies the first line conductor (L1) in a three-phase system. It is the default phase conductor for single-phase 120 V branch circuits and the standard L1 in three-phase configurations alongside red (L2) and blue (L3). Black L1 conductors carry the bulk of single-phase loads in commercial and industrial settings. On the Line Source connector, the black housing wraps the 170 mm body including the area around the key-release mechanism. This means the phase is identifiable even during the push-and-twist connection process, reducing the chance of connecting to the wrong L1 circuit. Because black appears in multiple phase conventions worldwide, the PowerFit phase-encoded SKU system (1BK vs 2BK vs NBK) prevents dangerous cross-convention mix-ups.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eWhat safety certifications apply to PFLS-1BK-S120M40A?\u003c\/h3\u003e  \u003cp\u003ePFLS-1BK-S120M40A is TUV Rheinland certified (ID 1111303479) under Type Approval, Safety, and Regular Production Surveillance categories. It also carries CE marking, RoHS compliance (Restriction of Hazardous Substances), and REACH compliance. The housing material achieves a UL94-V0 flammability rating, which is the highest classification for vertical flame resistance in plastics, meaning the material self-extinguishes within 10 seconds with no flaming drips. The key-release pin mechanism has been certified as part of the TUV evaluation, ensuring that the disconnect feature meets the same safety standards as the connection itself.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eHow does the key-release mechanism work on PFLS-1BK-S120M40A?\u003c\/h3\u003e  \u003cp\u003eThe PFLS-1BK-S120M40A features the innovative PowerFit push-and-twist connection. To connect, align the connector and push while twisting until it locks. To disconnect, the patent key-release pin enables tool-free uncoupling. Simply press the release and twist to separate. If needed, a small slotted screwdriver can assist with the release. For cable termination, the process follows the same steps as other PowerFit line connectors: strip 33 mm of cable jacket, apply the reduction sleeve, tighten set screws to 10.5 N\/m minimum, and secure the M40 cable gland. Uses the shorter cotter pin variant (vs the longer pin in Line Drain). The shorter pin accommodates the key-release mechanism. Never reuse cotter pins.\u003c\/p\u003e \u003c\/div\u003e \u003cdiv class=\"kupo-faq-seo-item\"\u003e  \u003ch3\u003eHow does PFLS-1BK-S120M40A compare to traditional single-pole power connectors?\u003c\/h3\u003e  \u003cp\u003ePFLS-1BK-S120M40A offers several meaningful improvements over conventional single-pole power connectors: the patent key-release pin enables tool-free disconnection that traditional locking mechanisms cannot match; IP67 protection when mated provides dust-tight and waterproof sealing that most single-pole connectors lack; the 1000 V AC \/ 1500 V DC voltage rating exceeds the typical 600 V maximum of traditional alternatives. These features, combined with TUV Rheinland certification and the phase-encoded black housing for L1 identification, make PowerFit a generation ahead of traditional designs.\u003c\/p\u003e \u003c\/div\u003e\u003c\/section\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is PFLS-1BK-S120M40A and what makes it innovative?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PFLS-1BK-S120M40A is a KUPO PowerFit 400 A line source connector with a black housing, identifying Line 1 (L1) under North America (NEC) conventions. As the source side of an inline cable connection, it features the innovative patent key-release pin that enables tool-free disconnection. The push-and-twist mechanism secures the connection during operation while allowing rapid uncoupling when needed. It is commonly deployed in outdoor music festival applications. When power cables stretch across a rain-soaked festival ground, IP67 protection is not a luxury.\"}}, {\"@type\": \"Question\", \"name\": \"What electrical performance does PFLS-1BK-S120M40A deliver?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PFLS-1BK-S120M40A is rated for 400 amperes continuous with 120 mm² cable, scaling to 660 amperes with 240 mm² cable. The maximum voltage rating is 1000 V AC or 1500 V DC. The silver-plated brass contact achieves a contact resistance of just 0.1 mOhms, significantly reducing resistive heating compared to plain brass contacts at sustained high-current loads. This low resistance is particularly important for L1 circuits carrying continuous phase current.\"}}, {\"@type\": \"Question\", \"name\": \"Why choose the black L1 variant (PFLS-1BK-S120M40A) for your installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Under North American NEC conventions, black identifies the first line conductor (L1) in a three-phase system. It is the default phase conductor for single-phase 120 V branch circuits and the standard L1 in three-phase configurations alongside red (L2) and blue (L3). Black L1 conductors carry the bulk of single-phase loads in commercial and industrial settings. On the Line Source connector, the black housing wraps the 170 mm body including the area around the key-release mechanism. This means the phase is identifiable even during the push-and-twist connection process, reducing the chance of connecting to the wrong L1 circuit. Because black appears in multiple phase conventions worldwide, the PowerFit phase-encoded SKU system (1BK vs 2BK vs NBK) prevents dangerous cross-convention mix-ups.\"}}, {\"@type\": \"Question\", \"name\": \"What safety certifications apply to PFLS-1BK-S120M40A?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PFLS-1BK-S120M40A is TUV Rheinland certified (ID 1111303479) under Type Approval, Safety, and Regular Production Surveillance categories. It also carries CE marking, RoHS compliance (Restriction of Hazardous Substances), and REACH compliance. The housing material achieves a UL94-V0 flammability rating, which is the highest classification for vertical flame resistance in plastics, meaning the material self-extinguishes within 10 seconds with no flaming drips. The key-release pin mechanism has been certified as part of the TUV evaluation, ensuring that the disconnect feature meets the same safety standards as the connection itself.\"}}, {\"@type\": \"Question\", \"name\": \"How does the key-release mechanism work on PFLS-1BK-S120M40A?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The PFLS-1BK-S120M40A features the innovative PowerFit push-and-twist connection. To connect, align the connector and push while twisting until it locks. To disconnect, the patent key-release pin enables tool-free uncoupling. Simply press the release and twist to separate. If needed, a small slotted screwdriver can assist with the release. For cable termination, the process follows the same steps as other PowerFit line connectors: strip 33 mm of cable jacket, apply the reduction sleeve, tighten set screws to 10.5 N\/m minimum, and secure the M40 cable gland. Uses the shorter cotter pin variant (vs the longer pin in Line Drain). The shorter pin accommodates the key-release mechanism. Never reuse cotter pins.\"}}, {\"@type\": \"Question\", \"name\": \"How does PFLS-1BK-S120M40A compare to traditional single-pole power connectors?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"PFLS-1BK-S120M40A offers several meaningful improvements over conventional single-pole power connectors: the patent key-release pin enables tool-free disconnection that traditional locking mechanisms cannot match; IP67 protection when mated provides dust-tight and waterproof sealing that most single-pole connectors lack; the 1000 V AC \/ 1500 V DC voltage rating exceeds the typical 600 V maximum of traditional alternatives. These features, combined with TUV Rheinland certification and the phase-encoded black housing for L1 identification, make PowerFit a generation ahead of traditional designs.\"}}]}\u003c\/script\u003e\u003csection class=\"kupo-download-section\" data-product-id=\"PFLS-1BK-S120M40A\"\u003e \u003ch2\u003eDownload\u003c\/h2\u003e \u003ca class=\"kupo-download-link\" href=\"https:\/\/pub-87314d729f334121b80f91e16c4e7f60.r2.dev\/PFLS-1BK-S120M40A.pdf\" target=\"_blank\" rel=\"noopener\" download\u003e  Download PFLS-1BK-S120M40A Spec Sheet (PDF) \u003c\/a\u003e\u003c\/section\u003e","brand":"KUPO Stage","offers":[{"title":"PowerFit \/ 400A \/ Inline Source","offer_id":53907614662955,"sku":"PFLS-1BK-S120M40A","price":0.0,"currency_code":"TWD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/6887\/6843\/files\/PFLS-1BK-S120M40A_b.jpg?v=1782112173","url":"https:\/\/kupostage.com\/products\/pfls-1bk-s120m40a","provider":"KUPO Stage","version":"1.0","type":"link"}