MX3.0mm Wire-to-Board PCB Connectors – Compatible with Molex Micro-Fit
MX3.0mm Wire-to-Board PCB Connectors – Compatible with Molex Micro-Fit 3.0 Series
Yoeruyo's MX3.0mm connector range delivers high-density wire-to-board and wire-to-wire interconnection at the 3.0mm pitch, fully compatible with the Molex Micro-Fit 3.0 series — the industry benchmark for compact, high-current power connectors in servers, storage systems, industrial equipment, and automotive electronics. The dual-row 3.0mm pitch design achieves a superior current density in a smaller footprint compared to 4.2mm Mini-Fit connectors, making it the preferred choice for space-constrained high-current applications.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Pitch | 3.0mm |
| Circuit Count | 2 to 24 circuits (dual row: 1×2 to 6×4) |
| Wire Range | 0.13mm² – 0.33mm² (AWG 26–22) signal; up to 1.0mm² (AWG 18) power |
| Rated Voltage | 600V AC/DC (UL rating) |
| Rated Current | 8.5A per contact (AWG 18) |
| Contact Material | Copper alloy, gold plated over nickel |
| Housing Material | PA66 (Nylon 66), UL94 V-0, natural or black |
| Operating Temperature | -40°C to +105°C |
| Locking | Dual-beam positive latch with secondary lock option |
| Mating Cycles | ≥30 cycles |
| Compliance | RoHS, REACH; UL-recognized |
Product Components
- Wire-side housing (plug) – dual-row receptacle housing accepting MX3.0mm crimp terminals; 2 to 24 circuits
- PCB header – vertical (through-hole) – straight PCB-mount header for wave or hand soldering
- PCB header – right-angle (through-hole) – 90° orientation for edge-mount and space-constrained PCB layouts
- Crimp terminals (female) – gold-plated copper alloy terminals for crimping onto AWG 18–26 wire
- Secondary lock / TPA – terminal position assurance clip for vibration-critical and safety-critical applications
- Pre-crimped wire assemblies – custom wire-to-connector assemblies for OEM integration
Application Scenarios
- Server & storage power distribution – internal power connections in rack-mount servers, NAS systems, and storage arrays
- Industrial power supplies – DC output connections in DIN-rail and panel-mount switching power supplies
- Automotive electronics – ECU power and signal connections, body control module wiring, and ADAS sensor power in automotive wire harnesses
- Telecommunications equipment – power distribution in rack-mount telecom, networking, and edge computing equipment
- Motor drives & servo systems – compact high-current power connections in servo drives, stepper motor controllers, and motion control systems
- Robotics & automation – power distribution and signal wiring in collaborative robots, AGVs, and industrial automation platforms
Why Choose Yoeruyo MX3.0mm Connectors
- ✅ Molex Micro-Fit 3.0 compatible – dimensionally and electrically compatible with Molex 43645/43640 series housings and 43030 series terminals
- ✅ High current density – 8.5A per contact at 3.0mm pitch delivers superior current capacity in a compact dual-row footprint
- ✅ Gold-plated contacts – gold over nickel plating ensures low contact resistance and long-term reliability in high-cycle applications
- ✅ Dual-beam positive latch + TPA – dual retention mechanism with optional terminal position assurance for vibration-critical and safety-critical applications
- ✅ UL 600V rated – suitable for use in safety-critical power distribution applications requiring UL recognition
Buying Guide – Selecting the Right MX3.0mm Component
- Circuit count – dual-row housings from 2 to 24 circuits; select based on your power and signal distribution requirements
- Wire gauge – AWG 18 (1.0mm²) for maximum 8.5A power circuits; AWG 22–26 for signal circuits; match terminal to wire gauge
- PCB header orientation – vertical for standard wire-to-board connections; right-angle for edge-mount and space-constrained PCB layouts
- Secondary lock (TPA) – strongly recommended for automotive, vibration-prone, and safety-critical applications to prevent terminal back-out
- MX3.0mm vs MX4.2mm – MX3.0mm offers higher circuit density at lower current per contact; MX4.2mm (Mini-Fit) offers higher current per contact (13A) at larger pitch
Frequently Asked Questions
Are these connectors compatible with Molex Micro-Fit 3.0?
Yes. Yoeruyo MX3.0mm housings and terminals are dimensionally compatible with Molex Micro-Fit 3.0 (43645/43640 series housings, 43030 series terminals). They mate correctly with genuine Molex Micro-Fit 3.0 counterparts.
What is the maximum current rating per contact?
The MX3.0mm terminal is rated at 8.5A per contact with AWG 18 wire. For multi-circuit power applications, distribute the load across multiple contacts to stay within the per-contact current rating.
What is the difference between MX3.0mm and MX4.2mm (Mini-Fit)?
MX3.0mm (Micro-Fit) has a 3.0mm pitch and is rated at 8.5A per contact — ideal for high-density power distribution in space-constrained designs. MX4.2mm (Mini-Fit) has a 4.2mm pitch and is rated at 13A per contact — better for higher-current applications where board space is less critical.
Do you offer pre-crimped wire assemblies?
Yes. Custom wire-to-connector assemblies with pre-crimped MX3.0mm terminals are available in specified wire lengths, gauges, and circuit counts. Contact us for OEM assembly quotations and lead times.
What crimping tool is required?
MX3.0mm terminals require a precision crimp tool compatible with Molex Micro-Fit 3.0 terminals (e.g., Molex 63819-0900 or equivalent micro-crimp tool). A proper ratchet crimp tool is essential for reliable, low-resistance crimps in production environments.
