SMM-125-02-SM-D Equivalent & Substitute Parts

Part Overview

The SMM-125-02-SM-D is a 50-position receptacle connector from Samtec Inc.'s Tiger Eye™ SMM series, designed for surface mount board-to-board or cable applications. This connector features 0.079" (2.00mm) pitch mating with gold-plated female socket contacts rated for 3.2A per contact at 350VAC. The part is Active status and ROHS3 compliant with UL94 V-0 flammability rating. Equivalent and substitute parts within this series provide alternative configurations while maintaining core electrical and mechanical compatibility for applications requiring different mounting features or assembly options.

Substiute Parts

SMM-125-02-SM-D

Samtec Inc.In Stock: 735SMM-125-02-SM-D Datasheet

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SMM-125-02-S-D-K

Samtec Inc.In Stock: 1027SMM-125-02-S-D-K Datasheet

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SMM-125-02-S-D-LC

Samtec Inc.In Stock: 1021SMM-125-02-S-D-LC Datasheet

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SMM-125-02-S-D-LC-K

Samtec Inc.In Stock: 649SMM-125-02-S-D-LC-K Datasheet

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SMM-125-02-S-D-LC-P

Samtec Inc.In Stock: 792SMM-125-02-S-D-LC-P Datasheet

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SMM-125-02-S-D-P

Samtec Inc.In Stock: 643SMM-125-02-S-D-P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMM-125-02-SM-D are selected based on identical core electrical and mechanical parameters: 50-position receptacle configuration, 0.079" (2.00mm) pitch, surface mount solder termination, 3.2A per contact current rating, 350VAC voltage rating, and -55°C to 125°C operating temperature range. All substitute parts maintain the same contact material (Beryllium Copper), contact finish (Gold mating / Tin post), insulation material (LCP), and flammability rating (UL94 V-0).

Substitution logic is determined by the following key parameters:

• Connector type, contact type, and position count (50-position female socket receptacle)
• Pitch and row spacing (0.079" / 2.00mm)
• Electrical ratings (3.2A, 350VAC)
• Mounting and termination method (Surface Mount, Solder)
• Environmental specifications (Temperature range, RoHS3, MSL 1)

Variations among substitute parts are limited to optional assembly features: Board Lock capability and Pick and Place compatibility. These features do not affect electrical or mechanical substitutability.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain Active product status and full ROHS3 compliance with identical electrical and mechanical specifications. Selection between the SMM-125-02-SM-D and its substitutes depends on assembly process requirements:

• SMM-125-02-SM-D: Base configuration without optional features. Suitable for standard assembly processes.
• SMM-125-02-S-D-K and SMM-125-02-S-D-P: Include Pick and Place feature for automated assembly compatibility.
• SMM-125-02-S-D-LC: Includes Board Lock feature for enhanced mechanical retention.
• SMM-125-02-S-D-LC-K and SMM-125-02-S-D-LC-P: Combine Board Lock and Pick and Place features for applications requiring both mechanical security and automated assembly.

All parts carry UL94 V-0 flammability certification, MSL 1 rating, and identical electrical performance. Part selection should be based on specific assembly equipment capabilities and mechanical retention requirements for the application.

Frequently Asked Questions (FAQ)

Q: Are all substitute parts electrically interchangeable with the SMM-125-02-SM-D?

A: Yes. All substitute parts maintain identical electrical ratings (3.2A per contact, 350VAC), operating temperature range (-55°C to 125°C), contact materials, and finishes. Electrical performance is equivalent across all listed parts.

Q: What is the difference between parts with and without Board Lock?

A: Board Lock is a mechanical retention feature. Parts designated with "LC" in the part number (SMM-125-02-S-D-LC, SMM-125-02-S-D-LC-K, SMM-125-02-S-D-LC-P) include this feature for enhanced mechanical security. Parts without this designation (SMM-125-02-SM-D, SMM-125-02-S-D-K, SMM-125-02-S-D-P) do not include Board Lock.

Q: What does the Pick and Place feature indicate?

A: Pick and Place compatibility indicates the connector is designed for automated assembly equipment. Parts with "K" or "P" designations (SMM-125-02-S-D-K, SMM-125-02-S-D-LC-K, SMM-125-02-S-D-LC-P, SMM-125-02-S-D-P) support automated placement processes.

Q: Can I substitute a part with Board Lock for one without Board Lock?

A: Yes, mechanically and electrically. However, the connector footprint and mounting requirements may differ due to the Board Lock mechanism. PCB layout and assembly process compatibility must be confirmed.

Q: Are all parts RoHS3 compliant?

A: Yes. All listed parts are ROHS3 compliant with UL94 V-0 flammability rating and MSL 1 moisture sensitivity level.

Q: What is the pitch specification for these connectors?

A: All parts feature 0.079" (2.00mm) mating pitch with 2-row configuration and 0.079" (2.00mm) row spacing. This specification is identical across all substitute parts.

Q: Do substitute parts have different current or voltage ratings?

A: No. All substitute parts are rated for 3.2A per contact and 350VAC. Electrical performance specifications are identical.