4.2mm Pitch 5557/5559 Molded Connector Cable, 2P 4P 6P Male Female Extension Wire Harness

It's injection‑molded integrated wire harness, compatible with Molex 5557/5559 series connector. Available in 2P,4P,6P,8P configurations, standard length 1M. Adopts round PVC outer cable, locking latch design for stable connection, anti‑pull‑relief strain relief at plug tail. Widely used for home appliances, industrial control equipment, fan, motor, power supply internal wiring.

Order(MOQ):
100
Payment:
T/T,L/C,Western Union,Paypal,MoneyGram
Product Origin:
China
Color:
Black or Customized
Shipping Port:
Shenzhen
Lead Time：
7-14 Days

5557 5559 Mini-Fit Jr connector

5559 wiring harness

4.2mm pitch connector

White 5559 connector

5557 Mini-Fit Jr cable assembly

Product Overview

Product Name	4.2mm 5557-5559 Molded Connector Cable
Wire Type	UL Wire, VDE Silicone insulated, stranded tinned copper
Service	OEM/ODM
Pin Count	2P /4P /6P /8P
Housing Color	Standard: Black；Optional: White
Working Temperature	‑20℃ ~ +80℃
Wire Conductor	Pure Copper
Certification	UL, VDE, CE, 3C, Rohs, IPC‑620, ISO9001, IATF16949 or Customize Special Cables
Cable Length	0.3m, 0.5m, 1m, 2m, or custom
Connector	5557(Female) /5559(Male)，Compatible with Molex 5557‑5559 series
Sample	Support

Key Features

One‑piece injection‑molded housing: One‑piece injection molding with integrated strain relief at the tail; resists wire breakage under repeated pulling and bending.
Snap‑lock latching structure: Precision snap‑lock latch ensures no accidental detachment under vibration, providing stable power and signal transmission.
Multiple pin configurations available: 2P/4P/6P/8P optional; male‑female pairs for extension; compatible with Molex 5557‑5559 series connectors.
Strict harness manufacturing standards: Fully automatic terminal crimping, 100% continuity testing, following IPC‑620 harness specifications to eliminate crimping defects.
Customization is available for wire gauge, overall cable length, terminal hole diameter, and connector color.

FAQ

Q1: What is a 4.2mm 5557/5559 connector?
A1: It is a 4.2mm-pitch power and signal connector system commonly used for wire-to-wire and wire-to-board applications. The 5557 and 5559 housings are mating components within the Mini-Fit Jr. family.

Q2: Can I customize cable length and wire gauge?
A2: Yes, we provide full OEM customization for length, color, and wire size.

Q3: Are 5557 and 5559 connectors compatible?
A3: Yes, compatible 5557/5559 configurations are designed as mating housing parts within this connector family. The exact terminal and housing combination must be checked against the selected part number.

Q4: What wire gauge is suitable for a 4.2mm connector harness?
A4: The suitable wire gauge depends on the terminal configuration and electrical requirements. Published Mini-Fit Jr. specifications include 16 AWG and 18–28 AWG stranded copper wire options, with current capacity changing according to wire gauge and circuit count.

Q5: Does a 6-pin connector carry the same current as a 2-pin version?
A5: Not necessarily. Connector current ratings can decrease as the number of loaded circuits increases because of heat accumulation and derating requirements.

Q6: Does a 6-pin connector carry the same current as a 2-pin version?
A6: Not necessarily. Connector current ratings can decrease as the number of loaded circuits increases because of heat accumulation and derating requirements.

Q7: Can Aichie customize cable length, wire gauge and housing color for 5557‑5559 cable?
A7: Yes. Support custom length, AWG wire size, pin count, black / white housing, cable jacket color, OEM silk‑screen marking. Accept small sample orders and mass OEM production. Sample lead‑time 7‑10 days.

Q8: Is 5557‑5559 molded cable fully compatible with original Molex 5557‑5559 connector?
A8: Our 4.2mm 5557‑5559 series is form‑fit‑function compatible. Pain point: some low‑cost copies have dimension deviation leading to difficult plug‑in or loose fit. Aichie strictly controls mold tolerance for stable intermateability.

Q9: Why intermittent connection occurs for molded terminal harness?
A9: Main causes: poor manual crimping, terminal oxidation, wire core broken inside injection housing. Aichie uses automatic crimping machine, 100% continuity test before shipment to reduce intermittent connection risk. Tin‑plated terminals should avoid long‑term high‑humidity environment.

Q10: What applications fit for 4.2mm 5557‑5559 molded wire harness?
A10: Suitable for internal power & signal wiring of household appliances, cooling fans, DC motors, switching power supply, industrial control boards, lighting equipment. Not suggested for outdoor waterproof scenarios, it is indoor non‑waterproof connector.

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Aichie Tech

wire harness factory

Automotive wire harness

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