2-Pin 6189-0172 Waterproof 7.8mm Female Connector – High-Current Motorcycle & Automotive Harness

Direct-fit replacement for Yazaki OEM part number 6189-0172, a 2-pin waterproof 7.8mm pitch connector from the Yazaki 7.8mm series – one of the largest standard automotive connector pitches, designed for high-current power circuits. At 7.8mm pitch, this connector handles significantly higher current loads than standard 2.8mm or 6.3mm connectors, making it suitable for main power feeds, starter motor circuits, and high-draw accessory wiring.

Key Specifications

• OEM Part Number: 6189-0172
• Pin Count: 2
• Gender: Female (with wire)
• Terminal Pitch: 7.8mm
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 30A per pin (high-current circuits)
• Operating Temperature: -40°C to +125°C

Applications

• Motorcycle main power feed – battery to fuse box harness connectors
• Starter motor circuit – high-current relay output connections
• Alternator output connector – charging circuit harness
• High-draw accessory wiring – heated grips, auxiliary lighting, winch circuits
• Automotive fan motor connectors – radiator and condenser fan harnesses

7.8mm Pitch – Why Size Matters

Connector pitch directly determines current-carrying capacity. The 7.8mm Yazaki series is rated for up to 30A per pin – significantly higher than:

• 2.8mm Metri-Pack 280: 13A per pin
• 6.3mm Faston / Metri-Pack 630: 20A per pin
• 7.8mm Yazaki series: 30A per pin

Using an undersized connector on a high-current circuit causes terminal overheating, insulation melting, and potential fire risk. Always match connector pitch to the circuit's maximum current draw.

Frequently Asked Questions

Q: What is the mating male connector for 6189-0172?
A: The mating male housing in the Yazaki 7.8mm series is 6189-0171 (2-pin male). Verify the male housing part number on your vehicle harness before ordering.

Q: Can I use this connector for a 30A circuit?
A: Yes. The 7.8mm Yazaki series is rated for 30A per pin. Ensure the wire gauge is appropriate – 30A continuous load requires a minimum of 12 AWG (3.0 mm²) wire to prevent voltage drop and overheating.

Q: What crimping tool is needed for 7.8mm Yazaki terminals?
A: Use a ratchet crimper rated for large-gauge terminals (10–14 AWG / 2.5–6.0 mm²). The Hozan P-706 or equivalent heavy-duty ratchet crimper is recommended. Do not use standard automotive crimpers – they are too small for 7.8mm terminals.

Q: Is this connector suitable for marine applications?
A: Yes. The IP68 waterproof rating makes the 6189-0172 suitable for marine, outdoor, and underbody applications where continuous water exposure is expected.

Package Contents

1 × 2-Pin Female Connector (6189-0172) with wire and terminal insert