39-00-0040 Headers by Molex – 4-Circuit PCB Connector

39-00-0040 Headers & Wire Housings by Molex – Compact 4-Circuit Connector for Versatile Applications

The Headers & Wire Housings 39-00-0040  by Molex are compact and reliable connectors from the trusted Molex KK® 254 Series. These wire-to-board connectors are engineered for a wide range of low- to mid-power signal applications, offering a consistent and secure connection in compact spaces. With gold-plated contacts and friction locks, these connectors ensure long-term electrical integrity in applications from consumer electronics to automotive systems.

In this blog, we’ll explore the product’s technical specs, key benefits, ideal applications, connection details, and how to buy or download the datasheet from Xon Electronics. If you need dependable 4-circuit connectors, Headers & Wire Housings by Molex are a top-tier choice.

Technical Specifications of 39-00-0040

• Manufacturer: Molex

• Part Number: 39-00-0040

• Type: Headers & Wire Housings

• Series: KK® 254

• Mounting Type: Through Hole

• Number of Circuits: 4

• Contact Type: Pin

• Contact Plating: Gold over Nickel

• Termination: Solder

• Pitch: 2.54 mm (0.100 in)

• Current Rating: 4.0A

• Material: Brass Contact, Nylon Housing

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

• Category: Connectors, Interconnects, Wire-to-Board

Compact and durable, this component is ideal for space-constrained applications needing secure electrical connectivity.

Key Features of 39-00-0040 Connectors

• Compact 4-Circuit Design – Saves space on crowded PCBs

• KK® 254 Series Compatibility – Trusted industry-standard footprint

• Gold Plated Contacts – Provides low contact resistance and corrosion protection

• Friction Lock Mechanism – Enhances mating retention

• Wide Operating Range – Supports demanding thermal environments

The 39-00-0040 Headers & Wire Housings by Molex deliver high performance in both everyday and industrial applications.

Applications of 39-00-0040 Headers

The versatility and reliability of this component make it perfect for:

• Consumer Electronics and Home Appliances

• Automotive Electronic Control Units

• Office Equipment and Printers

• Gaming Devices and Entertainment Systems

• Industrial Controllers and Robotics

• Embedded Systems and Prototyping

Whether you’re building a commercial device or a custom PCB, Headers & Wire Housings by Molex ensure high-quality signal transfer and system stability.

Wiring and Connection Overview

Headers & Wire Housings by Molex in the 39-00-0040 configuration are soldered directly onto a PCB with 2.54 mm pitch spacing. The wire housing connects securely over the header pins with a friction lock for stable mating.

Connection Steps:

1. Solder header to the PCB

2. Insert wires into the mating housing

3. Align and snap-lock the housing onto the header pins

This ensures safe and secure electrical performance without complex assembly.

Use Case Scenario: Automotive Control Interface

Scenario: An automotive design team needed a small, reliable header for interfacing a microcontroller to dashboard switches.

Problem: Previous connectors loosened over time due to vibration and temperature shifts.

Solution: The 39-00-0040 Headers & Wire Housings by Molex provided a friction lock system and gold-plated contacts to ensure stable, long-term performance.

Result: Increased connector lifespan, better reliability, and reduced service maintenance.

Download Datasheet for 39-00-0040

Want to access the complete specs and pin layout?

  Download 39-00-0040 Datasheet from Xon Electronics
(Link to be added once available)

Why Buy from Xon Electronics?

Shop Headers & Wire Housings by Molex at Xon Electronics and benefit from:

• 100% Genuine Molex Components
• Global Shipping – USA, India, Australia, Europe & more
• OEM & Volume Discounts
• Technical Support for Integration
• Safe, Easy, and Fast Checkout Process

Visit www.xonelec.com to get reliable wire-to-board solutions delivered worldwide.

Conclusion

The 39-00-0040 Headers & Wire Housings by Molex are compact, high-reliability connectors perfect for wire-to-board applications in consumer, automotive, and industrial sectors. With durable gold-plated pins, friction locks, and a versatile 2.54 mm pitch, these connectors are a smart choice for any precision circuit design. Order now from Xon Electronics and ensure consistent electrical performance.

FAQs – 39-00-0040 Headers & Wire Housings by Molex

Q1. What type of connector is 39-00-0040?
A 4-pin header from the Molex KK® 254 Series.

Q2. What’s the pitch size?
2.54 mm (0.100 in) pitch for standard PCB layout.

Q3. Does it support secure locking?
Yes, the housing includes a friction lock for stable mating.

Q4. What plating is used?
Gold over nickel for improved contact durability.

Q5. Can I buy it globally?
Yes, it's available at www.xonelec.com with shipping to USA, India, Australia, Europe, and more.