The Triple-Port Circular Sealed Connector (also known as a 3-way T-shaped or Y-shaped round splitter, or a 3-port enclosed junction connector) is a compact, ingress-protected circular interconnection device that enables a single incoming cable to divide securely into two outgoing devices while preserving a dust-tight and watertight seal at the entire junction.
Unlike exposed screw-terminal splice boxes, its rounded molded or threaded-lock housing fitted with O-rings or gasket seals delivers a clean, code-compliant division point for exterior LED illumination, photovoltaic arrays, detectors, small motors, and field power taps without needing to route everything back to a control panel.
| Parameter | Value |
|---|---|
| Number of poles | 2 / 3 / 4 (most common: 3-pin) |
| Rated current | 10A - 20A (3-pin power) / 4A (M12 4-pin signal) |
| Rated voltage | 300V / 600V AC (generic) / 250V (M12 A-code) |
| Protection level | IP67 standard, IP68 optional (when mated and capped) |
| Cable OD range | PG7 4-6.5mm / PG9 6-8mm / custom up to 11mm |
| Wire size | 0.5-2.5mm² (20-14 AWG) screw type |
| Contact resistance | ≤ 5 mΩ |
| Insulation resistance | ≥ 100 MΩ @ 500V DC |
| Dielectric strength | 1500-4000V AC / 1 min |
| Operating temperature | -40°C to +85°C (up to +105°C variant) |
| Housing material | PA66+GF, PBT, nickel-brass, 316SS option |
| Mating durability | ≥ 500 cycles (plastic), ≥ 2000 (LP16-class) |
| Standards | RoHS, CE, UL/CCC cable option, IEC 61076-2-101 (M12 version) |
vs. Metal Junction Box: 70% smaller footprint, no cover screws to corrode, no internal moisture buildup, 5-minute installation versus 20 minutes
vs. Zip-ties plus Heat Shrink: Maintains IP rating, can be reopened, visually inspectable
vs. Non-circular Rectangular Connectors: Round profile sheds water, performs better in hose-down and buried runs
vs. Two Separate Cordsets: Reduces cable waste and the number of fittings per branch point