Quick Clip On Wire Connector M20 2 Pin 3 Pin Straight Through Cable Jointer Connector
The M20 Straight-Through Waterproof Connector (also called M20 inline coupler / I-type axial waterproof connector) is a circular power/signal interconnect with a straight in-line barrel and an M20×1.5 (PG13.5-class) threaded coupling nut on each end. It joins two cable runs axially—one cable in, one cable out—while keeping the splice point fully sealed at IP67/IP68.
Unlike a T/Y splitter, it does not branch; unlike a junction box, it has no internal cavity to fill with water or condensate. Think of it as a reusable, field-wireable "extension joint" for outdoor and industrial cable runs that got cut too short, need mid-span servicing, or must pass through a panel wall with a clean sealed entry.
The "straight-through" body is the key buyer cue: low profile, no side bulge, passes easily through conduit, cable tray, or panel knockouts, and carries up to 20 A (2/3-pin) or 24 A in a 20 mm shell.
- Cut-to-length cable extension, sealed: Extend damaged LED trunk lines or sensor homeruns on site—strip both ends, screw into the two halves, twist locked, done in under 10 minutes
- IP67 standard / IP68 optional (mated): Dual O-ring + rear cable gland seals block rain, hose-down, dust, and temporary immersion
- 20 A capacity in slim 20-mm barrel: Covers streetlight feeds, 24/48 VDC battery bus, AC aux power, and multi-core sensor extensions
- Field-wireable screw terminals: Accepts 0.5-2.5 mm² (24-14 AWG) and cable OD 5-12 mm with gland insert swap
- Keyed polarization: 2/3/4/5-pin keyed inserts prevent L/N/G or +/- reversal; color shells for phase identification
- Vibration-proof threaded lock: M20×1.5 coupling nut with knurled grip passes vibration tests on conveyors, AGVs, and solar trackers
- Re-openable & reusable: Unscrew, re-terminate, re-lock—ideal for rental/stage gear and prototype machines
| Coupling Thread | M20 × 1.5 (PG13.5 compatible) |
|---|---|
| Body Style | Straight inline / axial (I-type) |
| Pins | 2 / 3 / 4 / 5 |
| Rated Voltage | 300 V AC/DC (2/3-pin), 250 V (4-pin), 110 V (5-pin) |
| Rated Current | 20 A (2/3-pin), 12 A (4-pin), 5 A (5-pin) |
| Contact Resistance | ≤ 5 mΩ |
| Insulation Resistance | ≥ 100 MΩ @ 500 V DC |
| Withstand Voltage | 1500 V AC / 1 min |
| Protection Rating | IP67 standard / IP68 optional (mated) |
| Cable OD Range | 5-12 mm (gland insert dependent) |
| Wire Gauge | 0.5-2.5 mm² (24-14 AWG) screw type |
| Operating Temperature | -40 °C to +85 / +105 °C |
| Shell Material | PA66+GF, UL94-V0 |
| Mating Cycles | ≥ 3000 (quality screw-build) |
| Certifications | CE, RoHS, UL/CCC options per SKU |
- Outdoor LED & Street Lighting: Mid-span repair of trunk lines, fixture-to-fixture jumpers, tunnel/facade lighting extensions
- Solar & Storage: PV string extension, inverter DC bus tap, off-grid 48 V battery interconnect
- Industrial Automation: Sensor/encoder cable extension on conveyors, robot dress packs, PLC cabinet exterior feed
- Surveillance & Smart City: Camera power+signal inline join, pole-to-pole DC taps
- Marine / RV / Agriculture: Deck light runs, tractor implement harness extension, irrigation valve solenoid feeds
- Stage & Event: Outdoor audio/lighting power trees, temporary IP-rated feeder joins
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