STMM-112-02-S-D-SM Equivalent & Substitute Parts

Part Overview

The STMM-112-02-S-D-SM is a rectangular connector header manufactured by Samtec Inc., designed for surface mount applications. This connector features 24 positions arranged in 2 rows with a 0.079" (2.00mm) pitch, utilizing shrouded 4-wall construction with push-pull fastening. The part is actively produced and ROHS3 compliant, making it suitable for applications requiring board-to-cable/wire connectivity with solder termination.

Identifying equivalent and substitute parts is necessary when addressing inventory constraints, supply chain disruptions, or design flexibility requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

STMM-112-02-S-D-SM

Samtec Inc.In Stock: 937STMM-112-02-S-D-SM Datasheet

Current PartRFQ

LTMM-112-02-S-D-SM

Samtec Inc.In Stock: 1127LTMM-112-02-S-D-SM Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STMM-112-02-S-D-SM is determined by strict alignment of the following critical parameters:

• Connector positioning and pitch: 24 positions, 2 rows, 0.079" (2.00mm) mating pitch, and 0.079" (2.00mm) row spacing
• Physical form factor: Surface mount construction with shrouded 4-wall design
• Electrical interface: Male pin contact type with gold-plated mating surface
• Termination method: Solder termination with push-pull fastening
• Material composition: Liquid Crystal Polymer insulation with phosphor bronze contacts
• Environmental compliance: ROHS3 compliance and MSL 1 rating

The LTMM-112-02-S-D-SM qualifies as a substitute based on matching all critical positioning, electrical, and mechanical parameters. Differences in application context (board-to-board versus board-to-cable/wire) and operating temperature range do not preclude substitution when the mating interface and electrical characteristics remain compatible.

Parameter Comparison

Engineering Selection Recommendations

Both the STMM-112-02-S-D-SM and LTMM-112-02-S-D-SM are active products manufactured by Samtec Inc. with ROHS3 compliance and MSL 1 ratings, ensuring regulatory alignment and moisture handling compatibility.

The primary distinction between these parts is the operating temperature range: the STMM-112-02-S-D-SM supports -55°C to 125°C, while the LTMM-112-02-S-D-SM supports -55°C to 105°C. Selection should be based on the specific thermal requirements of the application. For applications operating within the -55°C to 105°C envelope, either part is suitable. For applications requiring operation above 105°C, the STMM-112-02-S-D-SM is the appropriate choice.

Both parts share identical electrical characteristics, mechanical dimensions, contact configurations, and termination methods, ensuring functional interchangeability within their respective temperature specifications.

Frequently Asked Questions (FAQ)

Q: Can the LTMM-112-02-S-D-SM replace the STMM-112-02-S-D-SM in all applications?

A: The LTMM-112-02-S-D-SM can replace the STMM-112-02-S-D-SM provided the application does not require operation above 105°C. Both connectors share identical mating pitch, position count, contact configuration, and electrical ratings. The operating temperature range is the only parameter that differs between the two parts.

Q: What are the critical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: 24-position configuration in 2 rows, 0.079" (2.00mm) mating pitch, 0.079" (2.00mm) row spacing, surface mount construction, shrouded 4-wall design, male pin contacts, gold-plated mating surfaces, push-pull fastening, solder termination, and Liquid Crystal Polymer insulation.

Q: Are there any mechanical or electrical differences between these connectors?

A: No mechanical or electrical differences exist between the STMM-112-02-S-D-SM and LTMM-112-02-S-D-SM. Both connectors feature identical contact length, insulation height, contact shape, contact finish specifications, and current rating. The operating temperature range is the sole parameter that differs.

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the STMM-112-02-S-D-SM and LTMM-112-02-S-D-SM are ROHS3 compliant, carry MSL 1 ratings, and share identical ECCN and HTSUS classifications, ensuring equivalent regulatory standing.

Q: What is the significance of the series designation difference (STMM versus LTMM)?

A: The series designation reflects the product line within Samtec's Flex Stack connector family. The STMM series is optimized for board-to-cable/wire applications, while the LTMM series is optimized for board-to-board applications. Despite this application context difference, both series share identical connector geometry and electrical specifications at the mating interface.