STMM-120-02-S-D Equivalent & Substitute Parts

Part Overview

The STMM-120-02-S-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This shrouded 40-position connector with 2.00mm pitch operates across a wide temperature range and is actively supported. Substitute parts may be required due to inventory constraints, application-specific packaging needs, or design revision requirements while maintaining core electrical and mechanical compatibility.

Substiute Parts

STMM-120-02-S-D

Samtec Inc.In Stock: 751STMM-120-02-S-D Datasheet

Current PartRFQ

957240-6002-AR

3MIn Stock: 5703957240-6002-AR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STMM-120-02-S-D is determined by strict alignment of the following critical parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 40
• Number of Rows: 2
• Pitch - Mating: 0.079" (2.00mm)
• Row Spacing - Mating: 0.079" (2.00mm)
• Mounting Type: Through Hole
• Shrouding: Shrouded - 4 Wall
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Finish - Post: Tin

The part 957240-6002-AR (3M) meets these core substitution criteria. Both parts share identical mechanical footprints, contact configurations, and mating interfaces. Differences in secondary parameters such as insulation material, operating temperature range, current rating, and contact finish thickness do not preclude substitution when application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the STMM-120-02-S-D and 957240-6002-AR are active products with ROHS3 compliance and unlimited moisture sensitivity ratings. Selection between these parts depends on application-specific requirements:

The STMM-120-02-S-D supports extended temperature operation (-55°C to 125°C) and higher current capacity (3A), making it suitable for demanding thermal and power environments. The 957240-6002-AR operates within a narrower temperature range (-40°C to 105°C) with reduced current rating (1A), appropriate for standard industrial and commercial applications within these limits.

Both parts feature identical mechanical interfaces, pitch specifications, and contact configurations, ensuring direct footprint compatibility on printed circuit boards. The choice between LCP and thermoplastic insulation materials does not affect electrical performance for standard applications.

Frequently Asked Questions (FAQ)

Q: Can 957240-6002-AR replace STMM-120-02-S-D in all applications?

A: Direct replacement is possible only when the application operates within the 957240-6002-AR specifications: temperature range of -40°C to 105°C and current per contact not exceeding 1A. Applications requiring extended temperature operation or higher current capacity require the STMM-120-02-S-D.

Q: Are the mechanical footprints identical?

A: Yes. Both parts share identical pitch (2.00mm), row spacing (2.00mm), 40-position configuration, and through-hole mounting requirements. PCB layouts are directly compatible.

Q: What is the difference in packaging?

A: STMM-120-02-S-D is supplied in tube packaging, while 957240-6002-AR is supplied in tray packaging. This affects handling and storage but does not impact electrical or mechanical performance.

Q: Do both parts meet RoHS compliance?

A: Yes. Both STMM-120-02-S-D and 957240-6002-AR are ROHS3 compliant and REACH unaffected.

Q: What is the significance of the different insulation materials?

A: STMM-120-02-S-D uses Liquid Crystal Polymer (LCP) while 957240-6002-AR uses thermoplastic. Both materials provide adequate insulation for standard connector applications. Material selection does not affect mating compatibility or electrical performance in typical operating conditions.