Samtec TFC-125-22-LM-D-A Equivalent & Substitute Parts

Part Overview

The Samtec TFC-125-22-LM-D-A is a rectangular connector header from the Tiger Eye™ TFC series, designed for surface mount board-to-board or cable applications. This 50-position connector operates at 0.050" (1.27mm) pitch with dual-row configuration and shrouded 4-wall design. The part is currently active in production with full inventory availability. Substitute parts are identified to provide alternative options for applications requiring different insulation heights while maintaining core electrical and mechanical compatibility.

Substiute Parts

TFC-125-22-LM-D-A

Samtec Inc.In Stock: 1208TFC-125-22-LM-D-A Datasheet

Current PartRFQ

TFC-125-12-L-D-A

Samtec Inc.In Stock: 970TFC-125-12-L-D-A Datasheet

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TFC-125-32-L-D-A

Samtec Inc.In Stock: 917TFC-125-32-L-D-A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TFC-125-22-LM-D-A is determined by the following invariant parameters that must remain constant across all substitute parts:

• Manufacturer: Samtec Inc.
• Series: Tiger Eye™ TFC
• Base Product Number: TFC-125
• Number of Positions: 50
• Number of Rows: 2
• Pitch - Mating: 0.050" (1.27mm)
• Row Spacing - Mating: 0.050" (1.27mm)
• Connector Type: Header
• Contact Type: Male Pin
• Mounting Type: Surface Mount
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Length - Mating: 0.139" (4.63mm)
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Material: Phosphor Bronze
• Insulation Material: Liquid Crystal Polymer (LCP)
• Current Rating: 3.1A per Contact
• Voltage Rating: 275VAC
• Operating Temperature: -55°C ~ 125°C
• Material Flammability Rating: UL94 V-0

The primary variable parameter distinguishing substitute parts is insulation height, which accommodates different PCB stack-up requirements while preserving all electrical and mechanical interface specifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TFC-125-22-LM-D-A, TFC-125-12-L-D-A, and TFC-125-32-L-D-A—are active production items with ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts is determined solely by PCB stack-up requirements and available board space for the connector header.

The TFC-125-12-L-D-A features the lowest insulation height at 0.296" (7.52mm), suitable for compact designs with minimal vertical clearance. The TFC-125-22-LM-D-A provides a mid-range insulation height of 0.366" (9.30mm) for standard applications. The TFC-125-32-L-D-A offers the highest insulation height at 0.441" (11.20mm) for applications requiring additional board-to-board spacing or accommodating thicker PCB assemblies.

All substitute parts maintain identical electrical performance, contact ratings, temperature range, and mechanical interface specifications. Part selection is a mechanical accommodation decision based on available vertical space in the assembly.

Frequently Asked Questions (FAQ)

Q: Can TFC-125-12-L-D-A be used as a direct replacement for TFC-125-22-LM-D-A?

A: Yes, provided the PCB design accommodates the reduced insulation height of 0.296" (7.52mm) versus 0.366" (9.30mm). All electrical and mating interface parameters are identical. Verify available clearance above the connector header in your assembly.

Q: What is the primary difference between these three connector variants?

A: The insulation height is the only differing parameter. TFC-125-12-L-D-A measures 0.296" (7.52mm), TFC-125-22-LM-D-A measures 0.366" (9.30mm), and TFC-125-32-L-D-A measures 0.441" (11.20mm). All other specifications—pitch, contact count, current rating, voltage rating, and operating temperature—are identical.

Q: Are all three parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and carry UL94 V-0 flammability certification.

Q: Does insulation height affect electrical performance?

A: No. Insulation height is a mechanical dimension that does not impact electrical characteristics. Current rating, voltage rating, contact resistance, and operating temperature range remain constant across all three variants.

Q: Which part should I select for a new design?

A: Select based on available vertical space in your PCB assembly. If space is constrained, use TFC-125-12-L-D-A. For standard applications, TFC-125-22-LM-D-A is appropriate. For applications requiring maximum board-to-board separation, use TFC-125-32-L-D-A.

Q: Are these parts interchangeable at the mating interface?

A: Yes. The mating interface—pitch, contact count, contact length, and contact geometry—is identical across all three parts. Mating connectors designed for one variant will mate with any of the three.