What are the key features and ratings of the KUPO KHTN0331?

The KUPO KHTN0331 is a 63 A CEE form plug (inline male) built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards for 220-250 V single-phase power distribution. It features a 3-pole (2P+E) configuration that carries one live conductor, one neutral conductor, and one protective earth conductor. The flame-retardant PA6 (Polyamide 6) Nylon housing with nickel-plated brass contacts accepts cables from 6-25 mm². The IP44-rated housing measures 165 mm overall with a body diameter of 85 mm.

What built-in safety features does the KUPO KHTN0331 provide?

As an inline male plug carrying 63 A at 220-250 V, the KHTN0331 incorporates multiple layers of protection for safe field use. The keyed earth contact at the 6h clock position physically prevents cross-mating with connectors from incompatible voltage systems. The protective earth on this 3-pole (2P+E) connector always engages first and releases last, ensuring the ground path is established before any of the 2 remaining contacts connect. The IP44 (Ingress Protection 44) splash-proof rating protects this inline plug against water splashes and solid objects larger than 1 mm during portable field use.

What determines the mating compatibility of the KHTN0331?

The KUPO KHTN0331 is manufactured to IEC 60309-1 and IEC 60309-2 dimensional standards, ensuring full interoperability with CEE form connectors from all compliant manufacturers worldwide. To mate correctly, both connectors must share the same amperage rating (63 A), voltage class (220-250 V), pole configuration (3-pole (2P+E)), and earth contact clock position (6h). The clock position keying acts as a mechanical interlock: a 220-250 V connector with a 6h earth position cannot physically engage with a connector keyed to a different clock position, preventing dangerous cross-connections between incompatible electrical systems.

How do you open and wire the KUPO KHTN0331 for cable assembly?

Open the bayonet twist-lock housing by rotating it counterclockwise, strip the cable conductors to the required length, insert each conductor into its corresponding terminal and tighten the terminal screws. All screws face the same direction for faster, more intuitive wiring. Close the housing by pressing and rotating clockwise until the bayonet locks engage. The KHTN0331 accepts cables from 6-25 mm² through a 20 mm cable entry opening. The overall body length is 165 mm with a body diameter of 85 mm. The IP44 protection is maintained when the housing is properly closed and the cable gland is correctly tightened.

In what environments and industries is the KUPO KHTN0331 commonly used?

As a heavy-duty single-phase plug, the KHTN0331 serves main power feeds, industrial switchgear inputs, large motor drives, heavy machinery connections, and large-scale temporary event power distribution. As an inline plug, it is used in cable assemblies, extension leads, and portable equipment connections for general-purpose industrial and commercial power, lighting circuits, workstation feeds, shore power for boats and marinas, and portable equipment connections.

KHTN0331 -CEE Plug 63 A 3P 220-250 V 6h IP67

Name: KHTN0331 | KUPO CEE Plug 63 A 3P 220-250 V 6h IP67
Brand: KUPO
SKU: KHTN0331

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Product Description

Overview

Built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards, the KUPO KHTN0331 is a 63 A CEE form plug (inline male) rated for 220-250 V operation with 3-pole (2P+E) configuration. The CE-marked design features a flame-retardant PA6 (Polyamide 6) Nylon housing, nickel-plated brass contacts, and IP67 (Ingress Protection 67) watertight protection. The keyed earth contact at the 6-hour clock position and earth-first/earth-last engagement sequence ensure correctly matched connections across industrial, commercial, and entertainment applications.

Key Features

Protective earth engages first and releases last, ensuring the ground path is established before live contacts connect
Keyed earth contact at the 6-hour clock position prevents cross-mating with incompatible voltage systems
IP67 watertight housing withstands temporary immersion up to 1 meter and complete dust ingress for harsh outdoor and wet environments
Rugged screw-type coupling maximizes mechanical strength and sealing integrity for stable performance in demanding conditions
Flame-retardant PA6 (Polyamide 6) Nylon housing provides high impact resistance, electrical insulation, and self-extinguishing properties
Nickel-plated brass contacts deliver corrosion resistance and reliable low-resistance connections at sustained 63 A loads
All terminal screws face the same direction for faster, more intuitive wiring
Anti-loosening fin structure maintains a secure connection even under vibration
Blue-coded housing identifies the 220-250 V voltage class per international IEC 60309 color convention
Rated for operation from -25 to 40 °C

Standards

CE marked: Low Voltage Directive 2014/35/EU; IEC/EN 60309-1: 1999 +A1:2007 +A2:2012. General requirements for industrial plugs, socket-outlets and couplers; IEC/EN 60309-2: 1999 +A1:2007 +A2:2012. Dimensional compatibility requirements for pin and contact-tube accessories; RoHS Compliant: Directive 2011/65/EU and (EU)2015/863; REACH Compliant: Regulation No 1907/2006, Article 33(1) Obligation; IP67 Watertight. Match standards and compliance requirements to the local electrical code before installation.

Applications

Suitable for Temporary and permanent power distribution on construction sites, General-purpose single-phase industrial and commercial power, Shore power for boats and marinas, Heavy industrial main distribution feeds and generator connections, Site main incomers and primary power infrastructure, Cable assemblies, extension leads, and portable equipment connections, and Entertainment and live event production.

Compatibility

The KUPO KHTN0331 is manufactured to IEC 60309-1 and IEC 60309-2 standards, ensuring dimensional compatibility with CEE form connectors from all compliant manufacturers. The 6-hour clock position earth contact permits mating only with connectors of the same 220-250 V voltage class, preventing cross-connections between incompatible electrical systems.

Voltage Color Convention

IEC 60309 CEE clock face position diagram showing voltage color coding and earth contact positions for 3-pole, 4-pole, and 5-pole configurations

CEE form connectors use internationally standardized housing colors to indicate voltage class: Yellow for 110-130 V, Blue for 200-250 V, Red for 380-480 V, and Black for 500-690 V. The keyed clock position of the earth contact prevents cross-mating between different voltage systems, ensuring only compatible connectors can be joined. Always verify voltage and frequency compatibility with local electrical supply before installation.

Frequently Asked Questions

What are the electrical ratings?

63 A maximum; 220–250 V AC; 3 poles (2P+E); 6h earth-contact position.

What conductor size does it accept?

6–16 mm² conductors.

What are the protection rating and operating temperature?

IP67. Operating temperature: −25 to 40 °C.

What are its dimensions?

A: 260; B: 113.5; C: 32. All dimensions are in mm; labels correspond to the drawing in the product PDF.

What materials are used?

Flame-retardant PA6 nylon housing, with nickel-plated brass contacts.

Download

Download KHTN0331 Spec Sheet (PDF)