39-01-2021 Wire Housing by Molex – 2-Circuit Connector

39-01-2021 Headers & Wire Housings by Molex – Reliable Connectivity for PCB Assemblies

The Headers & Wire Housings 39-01-2021 by Molex are high-quality, durable, and versatile connectors that ensure secure wire-to-board terminations in electronic and industrial applications. As part of the trusted Molex 4.20mm pitch Mini-Fit Jr. series, these connectors provide excellent current handling, mechanical reliability, and design flexibility.

In this blog, we’ll explore the technical specifications, key features, applications, wiring layout, and ordering details for this product at Xon Electronics. If you're designing robust, high-density interconnect solutions, the Headers & Wire Housings by Molex are essential.

Technical Specifications of 39-01-2021

• Manufacturer: Molex

• Series: Mini-Fit Jr.

• Part Number: 39-01-2021

• Type: Wire Housing (Receptacle)

• Positions: 2 Circuits

• Pitch: 4.20mm

• Mounting Type: Free Hanging (In-Line)

• Contact Gender: Female

• Material: Nylon, UL 94V-2 rated

• Operating Temperature: -40°C to +105°C

• Category: Connectors, Headers & Wire Housings by Molex

This housing ensures strong mechanical integrity and supports up to 9A of current per contact when mated with appropriate terminals.

Key Features of 39-01-2021 Housing

• Mini-Fit Jr. Series – Designed for high-current wire-to-board and wire-to-wire configurations

• Polarized Design – Prevents mismating during assembly

• UL 94V-2 Nylon – Flame-resistant and high-temperature tolerant

• Secure Latching Mechanism – Ensures consistent and reliable connections

• RoHS Compliant – Meets environmental safety standards

These advantages make the 39-01-2021 Headers & Wire Housings by Molex ideal for industrial, consumer, and automotive electronics.

Applications of 39-01-2021 Connectors

The Headers & Wire Housings by Molex are trusted across a wide range of use cases:

• Consumer Electronics (TVs, PCs, Audio Systems)

• Data and Communication Equipment

• Industrial Automation & Robotics

• Gaming Machines and Embedded Devices

• Automotive Power and Control Systems

Their reliable electrical performance and rugged design make them ideal for modern electronic interconnects.

Wiring and Termination Overview

Typical Wiring Instructions for 39-01-2021:

1. Crimp terminals (sold separately) to wires

2. Insert crimped wires into the housing until they click into place

3. Mate with corresponding Mini-Fit Jr. headers for board connection

This two-position connector supports up to 18 AWG wires and integrates easily with Molex mating headers.

Use Case Scenario: Industrial Sensor Module Connector

Scenario: An industrial automation firm needed a compact 2-circuit connector to link sensors to a control board.

Problem: Previous connectors had mismating issues and poor current handling.

Solution: The 39-01-2021 Headers & Wire Housings by Molex offered keyed housing with high current capacity.

Result: Improved assembly efficiency, reduced connector failure rate, and streamlined inventory using Molex’s modular system.

This real-world use case reflects why Headers & Wire Housings by Molex are preferred by design engineers worldwide.

Download Datasheet for 39-01-2021

Need complete technical details or compliance documents?

Download 39-01-2021 Datasheet from Xon Electronics

Why Buy from Xon Electronics?

At Xon Electronics, we stock genuine 39-01-2021 Headers & Wire Housings by Molex with:

• 100% Authentic Molex Products
• Worldwide Shipping – USA, India, Australia, Europe & more
• OEM & Distributor Bulk Pricing
• Support for Connector Matching & Crimping Tools
• Fast, Secure Online Checkout

Visit www.xonelec.com and source premium Molex connectors with confidence.

Conclusion

The 39-01-2021 Headers & Wire Housings by Molex deliver reliable, high-density wire-to-board solutions that simplify design and improve system durability. With features like polarized entry, high current rating, and flame-retardant material, they are the ideal choice for engineers and manufacturers worldwide. Order now from Xon Electronics with global shipping to the USA, India, Australia, Europe, and more.

FAQs – 39-01-2021 by Molex

Q1. How many circuits does this housing support?
It has 2 circuits for wire termination.

Q2. What pitch is used in this connector?
It uses a 4.20mm pitch for Mini-Fit Jr. compatibility.

Q3. Is this housing compatible with other Molex terminals?
Yes, it supports Mini-Fit Jr. crimp terminals.

Q4. What is the rated current per contact?
Up to 9A when used with appropriate Molex terminals.

Q5. Where can I buy this globally?
Order from www.xonelec.com, shipping to USA, India, Australia, Europe, and other countries.