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MOLEX / WALDOM 39310040 Mini-Fit Jr. Power Connector

The MOLEX / WALDOM 39-31-0040 is a Mini-Fit Jr. power connector, specifically a vertical header designed for robust wire-to-board connections. This connector features a dual-row layout with 4 circuits, a 4.20mm pitch, and tin plating for enhanced conductivity and corrosion resistance. It is engineered for applications requiring reliable power transmission, such as industrial equipment, automotive systems, and consumer electronics. The header's vertical orientation simplifies integration into PCB designs, while its robust construction ensures durability and long-term performance. It is RoHS compliant and supports a maximum current of 9.0A per contact and a maximum voltage of 600V.

Authorized Distributors
Source:Newark
Part No:39-31-0040
Stock:950
Inv Date:06-17-2026
Price: Unit price: $0.328
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Part No:39-31-0040
Stock:542
Inv Date:06-18-2026
Price: Unit price: $0.97
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Part No:39-31-0040
Stock:0
Inv Date:06-17-2026
Price: Unit price: $0.6
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Part No:39-31-0040
Stock:13024
Inv Date:06-17-2026
Price: Unit price: $0.7242
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Part No:39-31-0040
Stock:2611
Inv Date:06-17-2026
Price: Unit price: $0.6211
Buy/RFQ:
Part No:39-31-0040
Stock:13024
Inv Date:06-17-2026
Price: Unit price: $0.7242
Buy/RFQ:
Part No:39-31-0040
Stock:599
Inv Date:06-17-2026
Price: Unit price: $0.6211
Buy/RFQ:

MOLEX / WALDOM 39310040 Mini-Fit Jr. Power Connector Specifications:

  • Product Family: PCB Headers
  • Series: 5566
  • Application: Power, Wire-to-Board
  • Circuits (Loaded): 4
  • Circuits (maximum): 4
  • Color - Resin: Natural
  • Durability (mating cycles max): 30
  • Flammability: 94V-0
  • Guide to Mating Part: None
  • Lock to Mating Part: Yes
  • Material - Metal: Brass
  • Material - Plating Mating: Tin
  • Material - Plating Termination: Tin
  • Material - Resin: Nylon
  • Number of Rows: 2
  • Orientation: Vertical
  • PC Tail Length: 3.50mm
  • PCB Locator: Yes
  • PCB Retention: None
  • PCB Thickness - Recommended: 1.60mm
  • Packaging Type: Bag
  • Pitch - Mating Interface: 4.20mm
  • Pitch - Termination Interface: 4.20mm
  • Plating min - Mating: 0.889µm
  • Polarized to Mating Part: Yes
  • Polarized to PCB: Yes
  • Shrouded: Fully
  • Stackable: No
  • Surface Mount Compatible (SMC): No
  • Temperature Range - Operating: -40°C to +105°C
  • Termination Interface: Style: Through Hole
  • Current - Maximum per Contact: 9.0A
  • Voltage - Maximum: 600V
  • Duration at Max. Process Temperature (seconds): 005
  • Lead-freeProcess Capability: WAVE
  • Max. Cycles at Max. Process Temperature: 001
  • Process Temperature max. C: 260
  • Engineering Number: 5566-04B-210
  • Application Specification: AS-5557-001-001
  • Packaging Specification: PK-5566-000, PK-5566-003-001
  • Product Specification: PS-5556-001
  • Sales Drawing: SD-5566-002-000

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Frequently Asked Questions

Where can I buy MOLEX / WALDOM 39310040?

You can click on the BUY or RFQ button to purchase 39310040 from an authorized MOLEX / WALDOM distributor.

How do I troubleshoot issues or seek technical support for part 39310040?

You can download the 39310040 datasheet or visit the MOLEX / WALDOM website for support.

Who is the manufacturer of 39310040?

MOLEX / WALDOM

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