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

Part Overview

The SMM-125-02-S-D is a 50-position receptacle connector manufactured by Samtec Inc. from the Tiger Eye™ SMM series. This surface mount board-to-board connector features a 0.079" (2.00mm) pitch with gold-plated mating contacts and push-pull fastening. The part is active in production with 1059 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific requirements where electrical and mechanical parameters align with the original specification.

Substiute Parts

SMM-125-02-S-D

Samtec Inc.In Stock: 1079SMM-125-02-S-D Datasheet

Current PartRFQ

150250-2000-RB

3MIn Stock: 1052150250-2000-RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMM-125-02-S-D is determined by strict alignment of the following critical parameters:

• Connector type: Receptacle
• Contact type: Female socket
• Number of positions: 50
• Mating pitch: 0.079" (2.00mm)
• Number of rows: 2
• Row spacing: 0.079" (2.00mm)
• Mounting type: Surface mount
• Termination: Solder
• Fastening type: Push-pull
• Contact finish (mating): Gold

The identified substitute part 150250-2000-RB (3M, 1502 series) meets all critical mechanical and electrical interface requirements. Both parts are active products with current inventory availability and comply with RoHS and REACH regulations.

Parameter Comparison

Engineering Selection Recommendations

Both the SMM-125-02-S-D and 150250-2000-RB are active products with current manufacturing status and full regulatory compliance. Selection between these parts is based on application-specific electrical requirements:

The SMM-125-02-S-D supports higher current capacity (3.2A per contact) and operates across a wider temperature range (-55°C to 125°C). The 150250-2000-RB provides higher voltage rating (500VDC) with lower current capacity (1A per contact) and a reduced upper operating temperature limit (-55°C to 105°C).

Both parts carry UL94 V-0 flammability ratings, are RoHS and REACH compliant, and feature MSL 1 moisture sensitivity classification. Mechanical and mating interface parameters are identical, ensuring physical and electrical compatibility within the connector interface.

Frequently Asked Questions (FAQ)

Q: Can the 150250-2000-RB directly replace the SMM-125-02-S-D in all applications?

A: Physical and mating interface compatibility is confirmed. Electrical compatibility depends on application current and voltage requirements. The SMM-125-02-S-D supports 3.2A per contact at 350VAC, while the 150250-2000-RB supports 1A per contact at 500VDC. Applications requiring current above 1A per contact must use the SMM-125-02-S-D.

Q: What are the key mechanical compatibility factors?

A: Both connectors share identical mating pitch (0.079"), row configuration (2 rows with 0.079" spacing), position count (50), and push-pull fastening mechanism. Surface mount termination and solder attachment are identical. Insulation height differs (SMM-125-02-S-D: 0.140"; 150250-2000-RB: 0.183"), which may affect board layout clearance.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both parts are RoHS compliant, REACH unaffected, and carry UL94 V-0 flammability ratings. The SMM-125-02-S-D is ROHS3 compliant; the 150250-2000-RB is RoHS compliant. Both feature MSL 1 moisture sensitivity classification.

Q: What is the temperature operating range difference?

A: The SMM-125-02-S-D operates from -55°C to 125°C. The 150250-2000-RB operates from -55°C to 105°C. Applications requiring operation above 105°C must use the SMM-125-02-S-D.

Q: How do the contact materials differ?

A: The SMM-125-02-S-D uses beryllium copper contacts with tin post finish. The 150250-2000-RB uses copper alloy contacts with tin post finish (200.0µin thickness). Both feature gold mating contact finish at 30.0µin thickness.