SSM-128-S-DV-LC-P Equivalent & Substitute Parts

Part Overview

The SSM-128-S-DV-LC-P is a 56-position rectangular receptacle connector from Samtec Inc.'s Tiger Claw™ SSM series. This surface mount, pass-through connector features female sockets with 0.100" (2.54mm) pitch spacing and gold-plated mating contacts. The component is actively produced and widely used in board-to-board and cable interconnect applications requiring reliable high-density connections.

Identifying equivalent and substitute parts is necessary when addressing supply chain constraints, inventory optimization, or design flexibility requirements while maintaining electrical and mechanical compatibility within the same connector family.

Substiute Parts

SSM-128-S-DV-LC-P

Samtec Inc.In Stock: 858SSM-128-S-DV-LC-P Datasheet

Current PartRFQ

SSM-128-S-DV-LC-K

Samtec Inc.In Stock: 1241SSM-128-S-DV-LC-K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution within the Tiger Claw™ SSM series is determined by strict equivalence across the following critical parameters:

• Connector geometry: 56 positions, 2 rows, 0.100" (2.54mm) pitch and row spacing
• Electrical specifications: 5.2A per contact, 405VAC/572VDC voltage rating
• Mechanical interface: Surface mount, solder termination, push-pull fastening
• Contact characteristics: Female socket, gold-plated mating surface (30.0µin thickness), phosphor bronze material, square contact shape
• Environmental compliance: ROHS3 compliance, MSL 1 rating, -55°C to 125°C operating range
• Physical construction: LCP insulation, black color, 0.290" (7.37mm) insulation height

The substitute part SSM-128-S-DV-LC-K matches all these parameters identically. The difference between the two part numbers lies in the fastening mechanism designation suffix, which does not alter the core electrical or mechanical compatibility within the same connector family and base product number (SSM-128).

Parameter Comparison

Engineering Selection Recommendations

Both SSM-128-S-DV-LC-P and SSM-128-S-DV-LC-K are active products from Samtec Inc. with identical ROHS3 compliance and MSL 1 ratings. Selection between these parts should be based on:

• Supply availability: SSM-128-S-DV-LC-K currently maintains higher inventory (1163 pcs vs. 788 pcs), providing improved lead time assurance for high-volume production.
• Design documentation: Verify that your PCB layout and assembly specifications reference the correct part number suffix to ensure proper component placement and orientation during manufacturing.
• Connector mating: Both parts are fully compatible with the same plug connectors and cable assemblies within the Tiger Claw™ SSM series.

No additional testing or qualification is required when substituting between these parts, as all electrical, mechanical, and environmental parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can SSM-128-S-DV-LC-K be used as a direct replacement for SSM-128-S-DV-LC-P?

A: Yes. Both parts share identical electrical ratings (5.2A per contact, 405VAC/572VDC), mechanical dimensions (56 positions, 0.100" pitch, 2 rows), contact materials (phosphor bronze with 30.0µin gold plating), and environmental specifications (-55°C to 125°C, ROHS3 compliant, MSL 1). They are functionally equivalent within the Tiger Claw™ SSM series.

Q: What is the difference between the -P and -K suffixes?

A: The suffix designates the fastening mechanism variant within the same connector family. Both variants employ push-pull fastening and are mechanically and electrically interchangeable. The difference does not affect PCB footprint, mating interface, or electrical performance.

Q: Are the PCB footprints identical?

A: Yes. Both parts are surface mount receptacles with identical pad layouts, insulation height (0.290"), and mounting requirements. No PCB redesign is necessary when substituting between these parts.

Q: Do these connectors support pass-through mating?

A: Yes. Both SSM-128-S-DV-LC-P and SSM-128-S-DV-LC-K are pass-through receptacles, allowing signal routing from the mating plug connector through to the PCB traces without interruption.

Q: What is the current-carrying capacity per contact?

A: Both parts are rated for 5.2A per contact at the specified voltage levels (405VAC, 572VDC). Total system current capacity depends on the number of loaded positions and thermal management design.

Q: Are both parts RoHS compliant?

A: Yes. Both SSM-128-S-DV-LC-P and SSM-128-S-DV-LC-K are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), suitable for standard PCB assembly and storage conditions.