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

Part Overview

The STMM-120-02-S-D-RA is an active rectangular connector header manufactured by Samtec Inc. This through-hole, right-angle connector features 40 positions across 2 rows with 2.00mm pitch and is designed for board-to-cable/wire applications. The connector employs shrouded 4-wall construction with push-pull fastening and solder termination. Finding equivalent or substitute parts may be necessary due to inventory constraints, supply chain considerations, or application-specific requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

STMM-120-02-S-D-RA

Samtec Inc.In Stock: 970STMM-120-02-S-D-RA Datasheet

Current PartRFQ

LTMM-120-02-S-D-RA

Samtec Inc.In Stock: 794LTMM-120-02-S-D-RA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STMM-120-02-S-D-RA 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, Right Angle
• Shrouding: Shrouded - 4 Wall
• Fastening Type: Push-Pull
• Contact Shape: Square
• Contact Material: Phosphor Bronze
• Insulation Material: Liquid Crystal Polymer (LCP)
• RoHS Status: ROHS3 Compliant

The LTMM-120-02-S-D-RA qualifies as a substitute part based on matching all critical electrical and mechanical parameters. Variations in application context (board-to-cable/wire versus board-to-board) and minor differences in operating temperature range and insulation height do not preclude substitution when the primary functional and electrical characteristics align.

Parameter Comparison

Engineering Selection Recommendations

Both the STMM-120-02-S-D-RA and LTMM-120-02-S-D-RA are active products manufactured by Samtec Inc. and maintain ROHS3 compliance with identical moisture sensitivity ratings. Selection between these parts should be based on the following factors:

The STMM-120-02-S-D-RA supports an operating temperature range of -55°C to 125°C and is specified for board-to-cable/wire applications. The LTMM-120-02-S-D-RA operates within -55°C to 105°C and is specified for board-to-board applications. The insulation height difference of 0.001" (0.03mm) is negligible for most applications.

For applications requiring the full 125°C upper temperature limit, the STMM-120-02-S-D-RA is the appropriate selection. For board-to-board interconnect scenarios where the 105°C maximum is sufficient, the LTMM-120-02-S-D-RA provides equivalent electrical and mechanical performance. Both parts share identical contact geometry, pitch, shrouding, and fastening characteristics, ensuring mechanical and electrical interchangeability within their respective temperature and application specifications.

Frequently Asked Questions (FAQ)

Q: Can LTMM-120-02-S-D-RA be used as a direct replacement for STMM-120-02-S-D-RA?

A: The LTMM-120-02-S-D-RA qualifies as a substitute when the application operates within the -55°C to 105°C temperature range. Both connectors share identical contact pitch (2.00mm), position count (40), row configuration (2), shrouding (4-wall), and fastening type (push-pull). The primary distinction is the application context and maximum operating temperature.

Q: What are the key compatibility factors for these connectors?

A: Compatibility is determined by matching connector type (header), contact type (male pin), position count (40), row spacing (2.00mm), mounting style (through-hole right-angle), shrouding configuration (4-wall), and fastening mechanism (push-pull). Both parts meet these criteria.

Q: Does the 0.001" difference in insulation height affect compatibility?

A: The insulation height difference of 0.001" (0.03mm) between the STMM-120-02-S-D-RA (0.236") and LTMM-120-02-S-D-RA (0.237") is within normal manufacturing tolerance and does not affect electrical or mechanical compatibility for standard PCB applications.

Q: Are both parts RoHS compliant?

A: Yes, both the STMM-120-02-S-D-RA and LTMM-120-02-S-D-RA are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level).

Q: What is the difference between board-to-cable/wire and board-to-board applications?

A: The STMM-120-02-S-D-RA is specified for board-to-cable/wire interconnects, while the LTMM-120-02-S-D-RA is specified for board-to-board connections. The connector geometry and electrical characteristics remain functionally equivalent; the designation reflects the intended mating interface type.