Molex 2039550301 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 2039550301 is a 30-position surface mount rectangular connector receptacle with outer shroud contacts and gold plating, part of the SlimStack FSB5 203955 series. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing production and design continuity. The connector features solder retention and is designed for high-density interconnect applications requiring reliable surface mount assembly.

Substiute Parts

2039550301

MolexIn Stock: 9572039550301 Datasheet

Current PartRFQ

2039550303

MolexIn Stock: 187902039550303 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Molex 2039550303 qualifies as a parametric equivalent to the 2039550301 based on the following critical substitution criteria:

Matching Parameters:

• Identical connector type: Receptacle with outer shroud contacts
• Identical position count: 30 positions
• Identical pitch: 0.016" (0.40mm)
• Identical row configuration: 2 rows
• Identical mounting method: Surface mount
• Identical contact finish: Gold plating
• Identical mated stacking height: 5mm
• Identical height above board: 0.114" (2.90mm)
• Identical series designation: SlimStack FSB5 203955
• Identical base product number: 203955
• Identical RoHS compliance: ROHS3 Compliant
• Identical MSL rating: 1 (Unlimited)

Differentiating Factor: The primary distinction is product status: the 2039550301 is obsolete, while the 2039550303 is active. The packaging differs (2039550303 is supplied in Tape & Reel format), and inventory availability is substantially higher for the active part.

Parameter Comparison

Engineering Selection Recommendations

The Molex 2039550303 is the direct active equivalent for the obsolete 2039550301. Both parts maintain identical electrical and mechanical specifications within the SlimStack FSB5 203955 series, ensuring functional interchangeability in surface mount applications.

Selection of the 2039550303 is supported by:

• Active product status with ongoing manufacturer support
• Full ROHS3 compliance matching the original part
• Identical connector geometry and contact configuration
• Substantially higher inventory availability (18,780 units versus 896 units)
• Tape & Reel packaging suitable for automated assembly processes
• Identical MSL rating and environmental specifications

No additional design modifications or PCB layout changes are required when transitioning from the 2039550301 to the 2039550303.

Frequently Asked Questions (FAQ)

Q: Are the 2039550301 and 2039550303 mechanically interchangeable?

A: Yes. Both parts share identical dimensions, pitch, row configuration, and mounting footprint. PCB layout and mating connector specifications require no modification.

Q: What is the primary reason for substitution?

A: The 2039550301 is obsolete. The 2039550303 is the active equivalent part from Molex, maintaining all electrical and mechanical parameters.

Q: Does packaging format affect electrical performance?

A: No. The Tape & Reel packaging of the 2039550303 is a supply format only and does not alter connector specifications or performance characteristics.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant with identical Moisture Sensitivity Level ratings of 1 (Unlimited).

Q: Can the 2039550303 be used in existing designs specified for the 2039550301?

A: Yes, without design revision. All functional and dimensional parameters are identical.

Q: What are the contact finish specifications?

A: Both parts feature gold plating on contacts, providing equivalent electrical conductivity and corrosion resistance.