The HP4 (High Power, 4-pin) wet-mate connector series is the highest-pin-count power connector in the BHB/ILB power family — combining four independent power contacts in a single wet-mate body to support complex power distribution topologies including 3-phase AC + protective earth, dual-rail DC + PE, or four independent DC circuits for multi-thruster or multi-motor subsea vehicles. Each contact is rated at 600V DC/AC at up to 70A, giving a maximum combined power delivery capacity of up to 280A total across all four contacts. Depth rated to 4,000 m (400 bar).
The High Power (HP) designation refers to the increased contact diameter and conductor accommodation compared to the standard BHB/ILB 2 and 3-pin connectors — HP4 contacts support cable conductors to 16 mm² per contact, compared to 10 mm² for the standard series. This enables the HP4 to handle higher per-contact currents at lower contact resistance. Available in bulkhead (HPBH4) and in-line (HPIL4) mount styles; female (F) and male (M) variants in each style.
| Parameter | Value |
|---|---|
| Rated voltage | 600V DC/AC per contact |
| Contacts | 4 pin |
| Current per contact | Up to 70 A |
| Max conductor | 16 mm² per contact |
| Seal | EPDM O-ring face seal |
| Depth rating | 4,000 m (400 bar) |
Choose HP4 when individual circuit current exceeds 50A, or when conductor cross-sections >10 mm² must be terminated. For lower-current 4-circuit requirements, consider using two BHB2 or ILB2 connectors in parallel — this reduces connector diameter and may simplify cable routing in space-constrained ROV frames. For high-current single-circuit requirements, the IL1/BH1 single-contact series remains the preferred choice.
The HPBH4M is a SubConn High Power Series bulkhead connector featuring 4 contacts rated for 600 V DC/AC rms at 50 A per contact (200 A max per connector). Chloroprene rubber body and nitrile O-ring seal enable wet-mate panel feed-through at 300 bar depth with >500 mating cycles. Bulkhead male for high-power ROV frames, subsea enclosures, and offshore power panels.
| Parameter | Specification |
|---|---|
| Model | HPBH4M (High Power Bulkhead, Male, 4 Pin) |
| Voltage Rating | 600 V DC/AC rms |
| Current Rating (Water) | 50 A per contact (200 A max per connector) |
| Contact Resistance | < 0.01 Ohm |
| Insulation Resistance | > 200 MOhm |
| Wet Mating Cycles | > 500 |
| Depth Rating (PEEK) | 300 bar / 4,350 psi |
| Pressure Tested | 800 bar / 11,600 psi (open face) |
| Connector Body | Chloroprene rubber |
| Bulkhead Materials | Brass, Stainless Steel, Titanium, Anodised Aluminium |
| Contacts | Brass UNS-C36000 |
| Cable (bulkhead leads, 1ft/30cm) | 10 AWG / 5.26 mm2 white tagged PTFE |
| Colour Code | 1:Black, 2:White, 3:Red, 4:Green |
| O-Rings | Nitrile |
| Temperature (Water) | -4 to +60 deg C |
| Temperature (Air) | -40 to +60 deg C |
| Model | Type | Use Case |
|---|---|---|
| HPIL4M | In-Line, Male, 4 Pin | High-power cable extension |
| HPIL4F | In-Line, Female, 4 Pin | High-power cable extension |
| HPBH4M (this product) | Bulkhead, Male, 4 Pin | High-power panel feed-through |
| HPBH4F | Bulkhead, Female, 4 Pin | High-power panel feed-through |
Contact our engineering team for high-power system integration, custom configurations, and volume pricing. Ships within 1-2 weeks from stock.
