PFLD-NBK-S120M40A – PowerFit 400A Line Drain Connector (N), Black
400A single-pole line drain connector. IP67, silver-plated brass contacts, push-and-twist lock, TÜV certified.
- Amperage rating: 400A maximum (120mm² cable)
- Voltage rating: 1000V AC, 1500V DC maximum
- Cable: 120mm²; M40 × 1.5 gland with bushing (ID: 22mm & 33mm)
- Terminal: Double set screws, 10.5 N/meter min.
- Connection type: Push-and-twist
- Connector type: Single-pole, inline, drain (female contact)
- Housing: High impact-resistant thermoplastic, UL94-V0
- Contact material: Brass (silver-plated)
- IP rating: IP67 while mated
- Compatibility: Compatible with major brands of single-pole power connector
- Certifications: TÜV Rheinland (ID 1111303479), CE, RoHS, REACH
Learn more
TÜV Rheinland certified (ID 1111303479): Type Approved, Safety, Regular Production Surveillance. CE marked. RoHS and REACH compliant. Flame Class UL94-V0. IP67 rated while mated. Silicone O-ring seal. Working temperature: 45°C to 85°C. Mating cycle: 500.
Compatible with major brands of single-pole power connector systems. The push-and-twist mating mechanism ensures reliable connection geometry and secure locking across standardized suppliers, enabling integration into existing power distribution infrastructure.
Best suited for:
Mobile power distribution for touring productions and live events, industrial plant power management, generator and UPS distribution panels, renewable energy systems, heavy machinery power supply, and wet or dust-prone environments where IP67 sealing prevents system failures.
Product Description
In balanced three-phase systems and single-phase distributions, the neutral conductor completes the circuit and carries unbalanced return current, ensuring system stability and protection device coordination. The PFLD-NBK-S120M40A is engineered to handle full 400A neutral duty with the reliability demanded by industrial and utility-scale power networks. Black insulation follows the Australian Standards (AS/NZS 3000) and the legacy UK colour scheme (BS 3371), making this connector the standard choice for regional installations in Australia, New Zealand, and older UK infrastructure. Rated for 1000 volts AC or 1500 volts DC at dual 400A/660A capacity, this female contact line drain connector provides the low-impedance, fault-tolerant neutral path that modern power systems require.
Key Features
- Rated Current: 400A / 660A dual-rated
- Voltage Rating: 1000V AC maximum / 1500V DC maximum
- Withstand Voltage: 4500V test (three seconds)
- Short Circuit: 35.5 kilo-amperes symmetrical
- Insulation Resistance: Greater than 5000 megohms at 500V DC
- Contact Resistance: 0.1 milliohms nominal (at rated current)
- Operating Temperature Range: 45 to 85 degrees Celsius
- Mating Cycles: 500 cycles minimum
- Ingress Protection: IP67 when mated
Certifications & Standards
- TÜV: Certified to TÜV standard 1111303479
- CE Marking: Compliant with European Union directive requirements
- RoHS Directive: Compliant with 2011/65/EU (Restriction of Hazardous Substances)
- REACH Regulation: Registered and compliant with EC 1907/2006 (Registration, Evaluation, Authorisation, and Restriction of Chemicals)
- UL94-V0: Housing meets highest flame-resistance classification
- AS/NZS 3000: Compliant with Australian and New Zealand electrical safety standard
- BS 3371: Historical UK colour code compliance for legacy infrastructure
Applications
- Three-phase industrial power distribution in Australia and New Zealand requiring neutral carrying capacity
- Utility-scale switchgear and load centers where unbalanced current return is essential
- Legacy UK electrical infrastructure upgrades and maintenance where BS 3371 colour conventions remain in use
- Modular power distribution systems serving regional markets with AS/NZS 3000 compliance requirements
- Heavy industrial machinery and process control systems operating at 400A neutral capacity
- Renewable energy installations (solar, wind) in ANZ regions where neutral continuity is critical for inverter operation
- Data centers and telecommunications facilities requiring high-current neutral pathways
- Marine and offshore platforms operating under IMCA (International Maritime Contractors Association) standards
Compatibility
The PowerFit 400A Line Drain female contact connector is fully compatible with male contacts from major single-pole power connector families used across Australia, New Zealand, and UK markets. The push-and-twist coupling mechanism (non-CAM) provides intuitive, reliable mating with consistent electrical and mechanical contact.
Cable gland accommodation: M40×1.5 thread (interior diameter 22 millimeters standard, or 33 millimeters with optional brass silver-plated reduction sleeve). Supports cables up to 16.50 millimeters diameter with reduction sleeve.
Phase / Wire Color Convention
| Region | L1 | L2 | L3 | N | Ground |
|---|---|---|---|---|---|
| NA 120/208V 1 | Green / G-Y | ||||
| NA 277/480V 2 | Green / G-Y | ||||
| IEC 60446 3 | Green-Yellow | ||||
| AU/NZ Legacy 4 | Green-Yellow | ||||
| China 5 | Green-Yellow |
1 North America 120/208V (NEMA / NEC) 2 North America 277/480V (NEMA / NEC) 3 Europe, UK, Australia (current IEC 60446)
4 Australia / New Zealand legacy (pre-IEC) 5 China (GB 50303) G-Y = Green-Yellow (earth/ground)
Frequently Asked Questions
PFLD-NBK-S120M40A FAQ
Who needs PFLD-NBK-S120M40A and what problem does it solve?
PFLD-NBK-S120M40A is a KUPO PowerFit 400A line drain connector with a black housing, designated for the Neutral (N) conductor under Australia and UK (Old, pre-2004) conventions. As the drain side of an inline cable connection, it receives the mating source contact and provides a sealed, IP67-rated junction when coupled. The black housing enables instant visual identification of the N conductor across cable runs. It is commonly deployed in touring theatrical production applications. Touring shows load in and load out of different venues on tight schedules, sometimes daily.
How much current can PFLD-NBK-S120M40A safely handle in continuous operation?
PFLD-NBK-S120M40A is rated for 400 amperes continuous with 120mm2 cable, scaling to 660 amperes with 240mm2 cable. The maximum voltage rating is 1000V AC or 1500V DC. The insulation resistance exceeds 5000 megaohms at 500V AC, and the test voltage rating of 4500V AC provides substantial safety margin. The short circuit rating of up to 35.5 kiloamperes means the connector can withstand fault conditions without catastrophic failure.
What does the black housing on PFLD-NBK-S120M40A indicate about its neutral assignment?
Black as Neutral follows Australian wiring conventions and the legacy UK color code (pre-2004 harmonization). In Australia, the standard wiring set includes black for Neutral alongside red (L1), white (L2), blue (L3), and green (Earth). On the Line Drain connector, the black housing is visible along the full 190mm body length, making N identification easy even when cables are bundled tightly. The ergonomic rubber grip section also carries the color, so technicians can identify the phase while handling the connector. Confusing neutral-black (Australian) with phase-black (NEC L1 or IEC L2) can create dangerous neutral-to-phase faults. Phase-encoded connectors prevent this.
How is PFLD-NBK-S120M40A certified for professional use?
PFLD-NBK-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 silicone O-ring seal contributes to the IP67 rating when mated, meaning the connection is fully protected against dust ingress and temporary immersion in water up to 1 meter for 30 minutes.
Can PFLD-NBK-S120M40A be integrated into an existing power distribution system?
PowerFit connectors are designed to be compatible with major brands of single-pole power connector. The key-release pin enables tool-free disconnect during strike, the push-and-twist connection engages in seconds, and the ergonomic rubber grip reduces hand fatigue during long load-in sessions involving dozens of connections. For N circuits using Australia and UK (Old, pre-2004) color conventions, the black PFLD-NBK-S120M40A ensures that phase identification remains consistent when mixing PowerFit connectors with existing inventory.
What tools and steps are needed to terminate PFLD-NBK-S120M40A?
To assemble PFLD-NBK-S120M40A, remove the M40 cable gland and extract the contact. Insert the contact into the insulator and align the cotter pin hole. Strip back the cable jacket by approximately 33mm, then slide the R120 reduction sleeve (brass with silver plating, up to 16.50mm wire diameter) over the exposed conductor. Hammer the cotter pin in from its chamfered side for proper seating. Slide the cable with reduction sleeve into the contact, then tighten both set screws using a 5mm hex key to a minimum of 10.5 N/m. Finally, thread the cable gland back on. The M40 gland includes two rubber bushings (inner diameter 23mm and 33mm) for flexibility with different cable sizes. At 190mm total length with a 32.5mm body diameter, the Line Drain is the longest connector in the PowerFit family, providing ample space for cable management and a secure grip surface.
Video and Download
PFLD-NBK-S120M40A — Download Spec Sheet (PDF) ↓
