Four-pole connections don't have to be a compromise. The LP24 4-Pin Solder-Type Aviation Connector handles 25A per contact at 400V — that's four power lines or three phases plus ground, all through one sealed plug. Soldered terminals for a joint that doesn't back out. IP68 sealing for the wet stuff. And a metal coupling thread that takes the wear, so the plastic stays light.

Four-pin setups are where things get interesting. Three-phase plus PE. Dual DC circuits. Two power lines and two control lines. The LP24 4-Pin Solder-Type Aviation Connector gives you that flexibility without needing two separate connectors. And the solder terminals are a deliberate choice — crimped joints loosen under vibration, soldered ones generally don't. For equipment that shakes, that matters.
The 4-pin layout runs 25A per contact at 400V, with 2500V withstand voltage. Cable entry takes 4mm² (12 AWG) wire with a 14mm outer diameter. That's power-class cable, sized for the current rating.
IP68 means this connector can sit in standing water, or take a pressure wash, and not let moisture in. We test at 2 meters for 24 hours. The housing is metal on the coupling thread — that's the part that takes the beating when someone cranks it too hard in the field — and plastic everywhere else to keep it light.
We've seen these end up on small industrial motors, pump stations, outdoor HVAC units, marine equipment, agricultural irrigation pumps. Places where you've got four lines running into equipment that gets wet, and a loose contact would mean a hot phase and a service call.

|
Pin Count |
4-Pin |
Protection Rating |
IP68 (when mated) |
|
Rated Current |
25A |
Housing Material |
Zinc Alloy + Engineering Plastic |
|
Rated Voltage |
400V |
Contact Material |
Gold-plated Copper Alloy |
|
Withstand Voltage |
2500V AC |
Cable Range |
4mm² (12 AWG) |
|
Contact Resistance |
< 5.0 mΩ |
Cable O.D. |
Φ14mm |
|
Insulation Resistance |
≥ 500 MΩ |
Assembly Type |
Soldering |
|
Temperature Range |
-40℃ to +80℃ |
Four-pole power runs in wet environments. Small three-phase motors with PE. Dual-circuit DC equipment. Marine power distribution. Outdoor HVAC compressors. Agricultural irrigation pumps. Construction site distribution boxes. Anywhere you need four lines running into equipment that gets wet — and that's where the LP24 4-Pin Solder-Type Aviation Connector ends up.
Every batch gets a dielectric test and a waterproof check. Solder joints get pull-tested, not just eyeballed. It costs us time. It saves you callbacks.
The LP24 series carries TUV, CE, and RoHS. We run ISO9001:2015, so material sourcing is consistent and production records are traceable. And the quality system actually gets audited — not just claimed.

Q: What's the 4th pin for?
A: Whatever you need it for. Three-phase plus PE is common. So is dual DC circuits. Or two power lines and two control lines.
Q: Why solder instead of screw terminals?
A: Vibration and current. At 25A, a loosened terminal heats up fast. A soldered joint stays put, doesn't corrode, and doesn't depend on someone torquing it right on site.
Q: What cable size does it take?
A: 4mm² (12 AWG) with a 14mm outer diameter. Power-class cable, sized for the current.
Q: Can it stay submerged?
A: Yes. IP68 covers continuous immersion. We test at 2 meters for 24 hours.

For specs, custom pin counts, or samples of the LP24 4-Pin Solder-Type Aviation Connector, email nick@cableinco.com. Tell us your current and cable size — we'll confirm the build.