Molex 4.2mm Pitch 5557 Series Wire Harness
Engineered for high-density applications, our Molex 5557 series connector harness features a 4.2mm pitch dual-row configuration with 2×2-pin contacts. Utilizing UL2464-certified 20AWG 4-core cable, this solution delivers reliable power transmission up to 7A per circuit with a voltage rating of 250V AC/DC. The integrated on/off switch provides convenient control without disconnection.
Industrial-Grade Reliability
Rated for 50+ mating cycles with a temperature range of -40°C to +105°C, ensuring performance in demanding environments.
Customization Ready
Supports wire gauges from 30AWG to 20AWG with custom length options available for specific application requirements.
Key Advantages
1 Space-Efficient Design
Dual-row 4.2mm pitch configuration maximizes connectivity in constrained spaces
2 Enhanced Control
Integrated on/off switch enables convenient circuit control without physical disconnection
3 Robust Construction
UL2464-rated cable with 20AWG conductors ensures reliable power transmission and signal integrity
Advanced Technology
Precision Engineering
Utilizes Molex's patented 5557 series contacts with friction lock system ensuring secure connections and vibration resistance
Quality Materials
High-temperature thermoplastic housing with tin-plated copper alloy contacts for optimal conductivity and corrosion resistance
Technical Specifications
Connector System
Molex 5557 series 4.2mm pitch
2×2-pin dual row configuration
Polarized housing design
Cable Specifications
UL2464 style cable
20AWG conductors (4-core)
PVC insulation (80°C rating)
OD: 4.8±0.2mm
Electrical Ratings
Voltage: 250V AC/DC
Current: 7A per circuit
Contact resistance: ≤10mΩ
Insulation resistance: ≥1000MΩ
Switch & Extension
Integrated on/off rocker switch
IP54 rated switch housing
Standard extension length: 300mm
Custom lengths available
Quality Production Process
1
Precision Cutting
Laser-measured wire cutting to ±0.5mm tolerance
2
Automated Crimping
Computer-controlled crimping with pull-force testing
3
Connector Assembly
Polarity-verified insertion with retention force check
4
Final Testing
100% continuity, hipot (1500VAC), and functional switch testing
Industrial Applications
Industrial Automation
- Control panel wiring for PLC systems
- Sensor and actuator connections
- Motor control circuit extensions
Power Equipment
- Power supply unit connections
- UPS and battery backup systems
- Electrical distribution panels
Control Systems
- Remote control station wiring
- Emergency stop circuit extensions
- Safety interlock systems
Molex 4.2 pitch 5557 series 2*2pin dual row UL2464 style 20AWG 4core cable on off switch control extension wire harness



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How to custom your own wire harness?
Send your sample or drawing/schematic for quote price→ Feedback with quotation(1~3 days) → Confirm quotation → Arrange sample you for approval→ [Make mold if needed (7 days) →Mold test] → Making samples(1~3 days)→Samples test(Approval) →place order for Mass production(2~3 weeks)→Quality checking→Packing →Delivery →After Service →Repeat Order.