Molex 39-01-2125 12-Pin (2×6) Mini-Fit Jr. Receptacle Housing

Reliable 12-Pin Molex Connector for Everyday Projects

The Molex 39-01-2125 Mini-Fit Jr. 5557 Series connector is your go-to solution for secure, high-quality connections in both home and DIY electronic projects. Commonly seen on desktop computer power supplies and graphics cards, this 12-pin Molex connector is the industry standard for compact power and signal connections.

Easy to Use & Versatile

Designed with a simple dual-row 2×6 configuration and a 4.2mm pitch, this Molex Mini-Fit Jr. receptacle housing ensures easy installation and strong, reliable engagement. With friction lock and built-in polarization features, you get extra protection against accidental unpluggingeven in high-vibration environments.

Compatible with standard Molex Mini-Fit Jr. female crimp terminals, this housing is perfect for power delivery, consumer electronics, embedded systems, or control panels. For best results, pair with Molex 0.165″ female pins and see our extraction hand tool for easy pin removal.

Key Features & Benefits

• Fits 12 pins in a flexible 2×6 dual-row layout
• 4.2mm (0.165″) pitch for compatibility with common male headers or plugs
• Durable housing of UL 94V-0 rated thermoplastic withstands temperature extremes (-40C to +105C)
• Locking mechanism prevents accidental disconnection
• Excellent dielectric strength for safe and stable connections
• Widely used in desktop PCs, modular power supplies, PCI-Express power, and embedded electronics

Technical Specifications

What’s Included

One Molex 39-01-2125 Mini-Fit Jr. 12-Pin (2×6) Receptacle Housing per pack. Pins not included find female pins here.