Molex 0399900303 Terminal Block Plug - Equivalent & Substitute Parts

Part Overview

The Molex 0399900303 is a 3-position terminal block plug designed for unshrouded headers with 0.197" (5.00mm) pitch spacing and 90° wire entry. This component features screw-type rising cage clamp termination and is rated for 10A at 300V UL. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

0399900303

MolexIn Stock: 7790399900303 Datasheet

Current PartRFQ

282830-3

TE Connectivity AMP ConnectorsIn Stock: 1753282830-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TE Connectivity AMP Connectors part number 282830-3 qualifies as a direct substitute based on the following critical parameters:

• Electrical Compatibility: Both parts maintain the same pitch (0.197"/5.00mm), position count (3), and voltage rating (300V UL). The substitute supports 12A UL current, which exceeds the original 10A requirement.
• Mechanical Compatibility: Both use identical M3 screw termination with rising cage clamp design, 90° wire entry orientation, and free-hanging in-line mounting configuration.
• Wire Gauge Compatibility: The substitute accepts 12-30 AWG (0.05-2mm²), which encompasses the original 12-24 AWG range.
• Contact and Housing Materials: Both employ phosphor bronze contacts and polyamide nylon housing, ensuring equivalent electrical and mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 282830-3 is the qualified substitute for the obsolete Molex 0399900303. Selection is based on:

• Product Status: The Molex part is obsolete; the TE Connectivity substitute is active and maintains current production status with 1729 units in stock.
• Regulatory Compliance: Both parts are RoHS compliant. The substitute carries additional REACH compliance certification, meeting current environmental standards.
• Performance Margin: The substitute provides enhanced specifications (12A vs. 10A current rating, -40°C to 110°C vs. 110°C operating range) while maintaining full backward compatibility with the original design parameters.
• Mechanical Interchangeability: Identical pitch, screw size, and termination method ensure direct mechanical substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 282830-3 be used as a direct replacement for the Molex 0399900303?

A: Yes. Both parts share identical pitch (5.00mm), position count (3), wire entry angle (90°), screw termination method (M3), and voltage rating (300V). The substitute meets or exceeds all electrical and mechanical requirements of the original.

Q: What is the wire gauge compatibility between these parts?

A: The Molex part accepts 12-24 AWG. The TE Connectivity substitute accepts 12-30 AWG, providing extended compatibility. Any wire gauge within the 12-24 AWG range used with the original part will function identically with the substitute.

Q: Are there differences in current rating between these parts?

A: The Molex part is rated 10A UL; the TE Connectivity substitute is rated 12A UL. The higher rating of the substitute provides additional safety margin and does not affect compatibility with circuits designed for 10A operation.

Q: What are the packaging differences?

A: The Molex part is listed with unspecified packaging; the TE Connectivity substitute is supplied in bulk packaging. Verify bulk packaging specifications against your procurement requirements.

Q: Do both parts meet RoHS requirements?

A: The Molex part is RoHS3 compliant. The TE Connectivity substitute is RoHS compliant and additionally carries REACH certification, meeting current environmental and regulatory standards.

Q: Are there color differences between these parts?

A: Yes. The Molex part is black; the TE Connectivity substitute is green. This is a cosmetic difference and does not affect electrical or mechanical function.