KHTN2351 – KUPO CEE Form 63A 5-Pole Industrial Connector, 400V, IP67
IEC 60309 industrial connector, 6 – 16mm² cable range, PA6 Nylon, nickel-plated brass, CE certified.
- Amperage rating: 63A
- Voltage: AC 380~415V, 5-pole (3P+N+E), 6h
- Connector type: Connector (inline female), IEC 60309
- Cable size: 6 – 16mm²
- Housing: Flame retardant PA6 Nylon, Red & Gray
- Contact material: Brass (nickel-plated)
- IP rating: IP44
- 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. IP44 rated: protected against solid objects over 1mm and water splashes from all directions.
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:
Industrial power distribution on construction sites, temporary event power for concerts and festivals, outdoor installations requiring splash-proof connections, generator hookups and portable power systems, workshop and factory floor equipment, and HVAC system connections in commercial buildings. 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 KHTN2351 is a 63A connector (inline female) designed for 380-415V 5-pole (3P+N+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
- Anti-loosening fin structure maintains a secure connection even under vibration
- Red-coded housing identifies the 380-415V 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
- Three-phase heavy machinery, motor drives, and HVAC (Heating, Ventilation, and Air Conditioning) systems
- Welding equipment and pump station power supply
- Heavy industrial main distribution feeds and generator connections
- Site main incomers and primary power infrastructure
- Cable assemblies, extension leads, and portable equipment connections
- Entertainment and live event production
Compatibility
The KUPO KHTN2351 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 380-415V 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 KHTN2351 CEE Form Connector 63A 5P 380-415V
What is the KUPO KHTN2351 and what are its primary specifications?
The KUPO KHTN2351 is a 63A CEE form connector (inline female) built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards for 380-415V three-phase power distribution. It features a 5-pole (3P+N+E) configuration that carries three live conductors, one neutral conductor, and one protective earth conductor for complete power distribution. The flame-retardant PA6 (Polyamide 6) Nylon housing with nickel-plated brass contacts accepts cables from 6-25 mmsq. The IP44-rated housing measures 175 mm overall with a body diameter of 105 mm.
What built-in safety features does the KUPO KHTN2351 provide?
The KHTN2351 connector (inline female), rated for 63A at 380-415V, includes integrated safety mechanisms to protect both the operator and connected equipment. The keyed earth contact at the 6h clock position physically prevents cross-mating with connectors from incompatible voltage systems. The protective earth on this 5-pole (3P+N+E) connector always engages first and releases last, ensuring the ground path is established before any of the 4 remaining contacts connect. The IP44 (Ingress Protection 44) splash-proof rating protects this inline connector against water splashes and solid objects larger than 1mm during portable field use.
What determines the mating compatibility of the KHTN2351?
The KUPO KHTN2351 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 (380-415V), pole configuration (5-pole (3P+N+E)), and earth contact clock position (6h). The clock position keying acts as a mechanical interlock: a 380-415V 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 KHTN2351 for cable assembly?
Open the bayonet twist-lock housing, prepare the cable by stripping conductors to the specified length, and secure each conductor in its terminal. The contact tubes inside the connector receive the plug's pins during mating. Close the housing by pressing and rotating clockwise until the bayonet locks click into place. The KHTN2351 accepts cables from 6-25 mmsq through a 25 mm cable entry opening. The overall body length is 175 mm with a body diameter of 105 mm. 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 KHTN2351?
As a heavy-duty three-phase connector, the KHTN2351 serves main power feeds, industrial switchgear inputs, large motor drives, heavy machinery connections, and large-scale temporary event power distribution. As an inline connector, it is used in cable assemblies, extension leads, and portable equipment connections for heavy machinery and motor drives, industrial HVAC (Heating, Ventilation, and Air Conditioning) systems, welding equipment, pump stations, and large-scale power distribution.
Why does the KHTN2351 use a 5-pole configuration instead of 4-pole?
The KHTN2351 uses a 5-pole (3P+N+E) configuration that carries three live conductors, one neutral conductor, and one protective earth conductor for complete power distribution. The critical difference from 4-pole (3P+E) is the inclusion of a neutral conductor. A 4-pole connector carries three live phases plus earth, which is sufficient for balanced three-phase loads like motors and pumps. However, when the installation needs to supply both three-phase and single-phase loads from one connection, a neutral conductor is essential. The 5-pole KHTN2351 enables distribution boards and temporary power systems to derive single-phase circuits (line-to-neutral) alongside three-phase feeds, making it the standard choice for event power distribution and mixed-load industrial panels.
Video and Download
KHTN2351 — Download Spec Sheet (PDF) ↓
