MX3.0 lock‑type connector is a fully compatible alternative for classic Molex 5557 / 5559 series connector system with 3.0 mm pitch. This finished 5557 cable harness is assembled by crimping brass terminals onto stranded electronic wires and inserting terminals into MX3.0 lock‑style plastic housing.
Equipped with snap‑in locking latch to prevent accidental disconnection caused by vibration or pulling inside appliances. It can transmit both low‑voltage power and control signals. Flexible pin count options (2‑24P). Supports custom wire gauge, harness length, tin‑dipped open ends and dual‑ended assemblies. Widely adopted for internal interconnection between main‑board and functional modules of smart home appliances, comply with RoHS‑2.0 and UL requirements for household electronics.
Specification
| Connector System | MX3.0 Lock‑Type (Compatible with Molex 5557 series) |
| Pitch | 3.0 mm |
| Circuits | 2‑24 Pin customizable |
| Rated Voltage | 600V AC / DC |
| Locking | Snap‑in positive locking latch |
| Operating Temperature | ‑25 ℃ ~ +85 ℃ |
Advantages
Positive Lock‑Latch Anti‑Drop‑Out Design
Built‑in snap locking structure, avoids loose or disconnection caused by appliance working vibration, improves long‑term reliability for household equipment.
Dual‑Purpose for Signal & Low‑Power Supply
3.0 mm pitch supports both control signal and moderate power supply, reduces connector types inside smart home appliances, simplify BOM.
Full Compatibility with Molex 5557/5559 PCB Headers
MX3.0 mechanical dimension matches classic 5557 series, can directly mate with original Molex board‑mount headers for replacement project.
Flame‑Retardant Housing for Household Safety
PA66 UL94‑V‑0 flame retardant plastic housing, meets safety requirements of home appliances.
High Customization Flexibility
Support different pin counts, wire gauges, lengths, wire colors and termination forms, adapt diverse internal wiring demands of various smart home products.
Cost‑Effective Stable Harness Solution
Mature 5557/MX3.0 system, easy for mass production, widely verified in home appliance industry.
Application
Smart Home Appliances
Smart air conditioner control panel, smart oven, range hood, washing machine internal board‑to‑module wiring harness.
Smart Lighting System
Smart ceiling lamp, panel light, RGB controller internal power‑signal interconnection.
Small Kitchen Household Appliances
Air fryer, coffee maker, food processor main‑board to sensor / switch wiring.
Smart Access Control & Smart Lock Equipment
Smart door lock, access control controller internal signal and low‑power wiring.
Household Intelligent Sensor Modules
Indoor temperature‑humidity sensor, human‑body induction module internal wire‑to‑board connection.
FAQ
Q1: What is the relation between MX3.0 and 5557?
A: MX3.0 is lock‑type alternative / compatible version for Molex 5557‑series 3.0 mm pitch connector, same pitch and mating dimension, added locking latch function.
Q2: What is maximum per‑pin current?
A: Max 5A per contact, actual working current shall be limited by selected wire AWG, mainly for low‑voltage household internal wiring.
Q3: Can MX3.0 directly plug into original Molex 5559 PCB header?
A: Yes, mechanical dimension is compatible, MX3.0 cable‑side housing can mate with 5559 board‑mount headers.
Q4: Is this harness waterproof?
A: Standard MX3.0 /5557 is non‑waterproof, designed for inside appliance enclosure only, not for exposed wet environment.
Q5: What AWG wire is commonly used for smart home appliance?
A: 22‑24AWG for signal circuits; 18‑20AWG for low‑power power loops inside household appliances.
