KHTN6331 – KUPO CEE Form 63A 3-Pole Industrial Inlet, 230V, IP67
IEC 60309 panel inlet, 6 – 25mm² cable range, PA6 Nylon, nickel-plated brass, CE certified.
- Amperage rating: 63A
- Voltage: AC 220~250V, 3-pole (2P+E), 6h
- Connector type: Inlet (panel male), IEC 60309
- Cable size: 6 – 25mm²
- Housing: Flame retardant PA6 Nylon, Blue & Gray
- Contact material: Brass (nickel-plated)
- IP rating: IP67
- Operating temp: -25°C to 40°C
- Standard: IEC/EN 60309-1, IEC/EN 60309-2
- Compatibility: Intermates with all IEC 60309 connectors of matching rating
- Certifications: CE, RoHS, REACH
Learn more
CE marked per Low Voltage Directive 2014/35/EU. Compliant with IEC/EN 60309-1: 1999 +A1:2007 +A2:2012 and IEC/EN 60309-2: 1999 +A1:2007 +A2:2012. RoHS compliant per Directive 2011/65/EU and (EU)2015/863. EU REACH Regulation No 1907/2006 Article 33(1). Operating temperature: -25 to 40 degrees Celsius. IP67 rated: protected against dust ingress and temporary immersion in water.
Fully intermates with all IEC 60309-compliant industrial plugs and sockets of matching amperage, voltage, and pole configuration. The standardized earth contact position (clock hour keying) prevents cross-mating between different voltage ratings, ensuring safe connection across multi-vendor installations.
Best suited for:
Permanent panel-mounted power distribution in electrical enclosures, switchgear assemblies, generator output panels, portable power distribution racks for touring and events, and industrial control cabinets requiring standardized IEC 60309 connection points. Also suited for high-current industrial feeders, main power distribution for large-scale events and temporary installations, heavy machinery power supply, and primary service connections requiring robust multi-pole termination.
Product Description
Part of KUPO's complete CEE form connector range spanning 16A to 125A and 110V to 400V, the KHTN6331 is a 63A inlet (panel-mount male) designed for 220-250V 3-pole (2P+E) circuits. Like every connector in the range, it 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 comply with IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards, ensuring safe interoperability with any compliant CEE connector.
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 63A loads
- All terminal screws face the same direction for faster, more intuitive wiring
- Panel-mount design with standardized cutting hole dimensions for straightforward integration into enclosures, distribution boxes, and equipment panels
- Blue-coded housing identifies the 220-250V voltage class per international IEC 60309 color convention
- Rated for operation from -25 to 40 degrees Celsius
Certifications & 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
Applications
- 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
- Distribution boards, switchgear assemblies, and equipment panel installations
- Entertainment and live event production
Compatibility
The KUPO KHTN6331 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 220-250V voltage class, preventing cross-connections between incompatible electrical systems.
Voltage Color Convention
CEE form connectors use internationally standardized housing colors to indicate voltage class: Yellow for 110-130V, Blue for 200-250V, Red for 380-480V, and Black for 500-690V. 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
Frequently Asked Questions: KUPO KHTN633 CEE Form Inlet 63A 3P 220-250V
What is the KUPO KHTN633 and what are its primary specifications?
The KUPO KHTN633 is an 63A CEE form inlet (panel-mount male) built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards for 220-250V 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 10-35 mmsq. The IP44-rated housing has a flange dimension of 100 mm and requires a panel cutout of 85 mm.
How does the earth contact design of the KHTN633 enhance electrical safety?
As a panel-mounted inlet feeding 63A 220-250V power into equipment, the KHTN633 prioritizes safe power transfer at the point of entry. 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) rating protects the panel-mounted connection against splashing water from all directions and solid objects larger than 1mm, maintaining protection integrity within the enclosure.
How does the IEC 60309 standard ensure the KHTN633 works in multi-vendor installations?
The KUPO KHTN633 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 (63A), voltage class (220-250V), pole configuration (3-pole (2P+E)), and earth contact clock position (6h). The clock position keying acts as a mechanical interlock: a 220-250V 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.
What installation steps are required to fit the KHTN633 into a panel enclosure?
Cut the panel opening to the specified cutout dimensions. Mount the inlet from the rear of the panel so that the pins protrude through to the front. Secure with mounting hardware and wire the internal conductors to the terminals from behind the panel. The KHTN633 has a flange dimension of 100 mm and requires a panel cutout of 85 mm. The cable size range for this unit is 10-35 mmsq. All terminal screws face the same direction for faster wiring. The IP44 protection is maintained when the housing is properly closed and the cable gland is correctly tightened.
What are the typical applications for the KHTN633?
As a heavy-duty single-phase inlet, the KHTN633 serves main power feeds, industrial switchgear inputs, large motor drives, heavy machinery connections, and large-scale temporary event power distribution. Panel-mounted in distribution boxes, switchgear assemblies, and equipment enclosures, it provides a permanent 220-250V connection point for Single-phase loads including lighting, portable tools, general power outlets, workstation feeds, and individual equipment connections.
Video and Download
KHTN6331 — Download Spec Sheet (PDF) ↓
