The Molex 39-01-2020 is a Mini-Fit Jr. Series 5557 receptacle housing designed for power and signal connections in wire-to-wire and wire-to-board applications. It is commonly found in power supplies, industrial equipment, automotive electronics, and other high-current systems.
Key Features
- Part Number: 39-01-2020
- Series: Mini-Fit Jr. 5557
- Connector Type: Receptacle Housing (Female)
- Positions/Circuits: 2
- Rows: 2 (dual-row configuration)
- Pitch: 4.20 mm
- Mounting Style: Free-hanging / cable mount
- Termination: Crimp contacts (sold separately)
- Housing Material: Nylon (PA66)
- Colour: Natural (off-white)
- Operating Temperature: -40°C to +105°C
Physical Description
The housing is a compact, rectangular nylon connector body with:
- Two female contact cavities arranged in a dual-row layout.
- A positive locking latch on top that securely mates with compatible Mini-Fit Jr. plugs or headers.
- Polarized geometry, preventing incorrect insertion.
- Scoop-proof design to protect terminals during mating.
Common Applications
- PC power supplies (similar connector family to ATX power connectors)
- Industrial control equipment
- Automotive electronics
- Medical devices
- Telecommunications and networking equipment
Compatible Contacts
This housing is designed to accept Mini-Fit Jr. female crimp terminals, such as the Molex 5556 and related Mini-Fit Plus contacts.
In simple terms, the 39-01-2020 is a 2-way female Mini-Fit Jr. connector housing that provides a secure, locking connection for medium-to-high current power applications.
