MMS-121-01-LM-SH Equivalent & Substitute Parts

Part Overview

The MMS-121-01-LM-SH is a 21-position receptacle connector manufactured by Samtec Inc., designed for board-to-board or cable applications with through-hole, right-angle mounting. This connector features a 0.079" (2.00mm) pitch, gold-plated mating contacts, and tin-plated posts for solder termination. The part is currently active in production with 786 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the MMS series, allowing for component interchangeability in applications where specific design constraints permit.

Substiute Parts

MMS-121-01-LM-SH

Samtec Inc.In Stock: 871MMS-121-01-LM-SH Datasheet

Current PartRFQ

MMS-121-01-L-SH

Samtec Inc.In Stock: 698MMS-121-01-L-SH Datasheet

SimilarRFQ

MMS-121-01-L-SH

Samtec Inc.In Stock: 698MMS-121-01-L-SH Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMS-121-01-LM-SH is determined by strict equivalence across the following critical parameters:

• Series designation (MMS)
• Number of positions (21)
• Pitch specification (0.079" / 2.00mm)
• Connector type (Receptacle)
• Mounting configuration (Through Hole, Right Angle)
• Contact material and finish (Gold mating surface, Tin post finish)
• Current rating (3.9A per contact)
• Operating temperature range (-55°C ~ 125°C)
• Insulation material (Liquid Crystal Polymer)
• RoHS compliance status (ROHS3)

The identified substitute part MMS-121-01-L-SH maintains all critical electrical and mechanical parameters required for direct substitution within the MMS-121 connector family.

Parameter Comparison

Engineering Selection Recommendations

Both MMS-121-01-LM-SH and MMS-121-01-L-SH are active production components from Samtec Inc. with full ROHS3 compliance and identical electrical and mechanical specifications. Selection between these parts should be based on inventory availability and lead time requirements. The MMS-121-01-LM-SH currently maintains higher stock levels at 786 units compared to 686 units for the MMS-121-01-L-SH. Both parts satisfy identical application requirements for 21-position, 2.00mm pitch receptacle connectors with through-hole right-angle mounting and 3.9A per contact current capacity across the -55°C to 125°C operating range.

Frequently Asked Questions (FAQ)

Q: Can MMS-121-01-L-SH be used as a direct replacement for MMS-121-01-LM-SH?

A: Yes. Both parts maintain identical electrical and mechanical parameters including connector type, position count, pitch, mounting configuration, contact materials, finishes, current rating, and operating temperature range. Both are ROHS3 compliant active production parts.

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

A: Substitution is valid when the following parameters remain constant: series designation (MMS), position count (21), mating pitch (0.079" / 2.00mm), connector type (receptacle), mounting type (through-hole right angle), contact finish specifications (gold mating / tin post), current rating (3.9A per contact), operating temperature range (-55°C to 125°C), and insulation material (LCP).

Q: Are there differences in packaging or handling between these parts?

A: Both parts are supplied in tube packaging. The MMS-121-01-L-SH carries a Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), while the MMS-121-01-LM-SH does not specify an MSL rating. This indicates the substitute part has no moisture sensitivity restrictions during storage and handling.

Q: What compliance certifications apply to both parts?

A: Both MMS-121-01-LM-SH and MMS-121-01-L-SH are ROHS3 compliant and classified under ECCN EAR99 with HTSUS code 8536.69.4040.