Samtec TFM-125-02-L-D Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Samtec TFM-125-02-L-D is a surface mount rectangular connector header from the Tiger Eye™ TFM series, designed for board-to-board or cable applications. This 50-position, dual-row connector operates at 2.9A per contact with a 275VAC voltage rating and maintains performance across -55°C to 125°C. The part is Active status and ROHS3 compliant, making it suitable for current production environments. Substitute parts are identified when equivalent electrical and mechanical parameters are required but alternative feature configurations or availability conditions necessitate component selection alternatives.

Substiute Parts

TFM-125-02-L-D

Samtec Inc.In Stock: 1075TFM-125-02-L-D Datasheet

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TFM-125-02-L-D-A

Samtec Inc.In Stock: 1356TFM-125-02-L-D-A Datasheet

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TFM-125-02-L-D-A-K

Samtec Inc.In Stock: 1182TFM-125-02-L-D-A-K Datasheet

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TFM-125-02-L-D-DS

Samtec Inc.In Stock: 1294TFM-125-02-L-D-DS Datasheet

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TFM-125-02-L-D-LC

Samtec Inc.In Stock: 924TFM-125-02-L-D-LC Datasheet

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TFM-125-02-L-D-WT

Samtec Inc.In Stock: 1343TFM-125-02-L-D-WT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TFM-125-02-L-D are qualified based on identical electrical and mechanical core parameters: 50-position, dual-row configuration; 0.050" (1.27mm) pitch and row spacing; surface mount solder termination; 2.9A per contact current rating; 275VAC voltage rating; -55°C to 125°C operating temperature; phosphor bronze contacts with gold mating finish; and LCP insulation material. All substitute parts maintain the same shrouded 4-wall design, push-pull fastening, and board-to-board or cable style.

Substitution differentiation is determined exclusively by feature additions, which do not alter core electrical or mechanical compatibility:

• TFM-125-02-L-D-WT: Adds solder retention feature
• TFM-125-02-L-D-DS: Adds mating flange feature
• TFM-125-02-L-D-A: Adds board guide feature
• TFM-125-02-L-D-LC: Adds board lock feature
• TFM-125-02-L-D-A-K: Adds board guide and pick-and-place features

All substitute parts are Active status, ROHS3 compliant, and manufactured by Samtec Inc. within the Tiger Eye™ TFM series.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain full electrical and mechanical equivalence to the TFM-125-02-L-D. Selection among these parts depends on application-specific mechanical requirements:

TFM-125-02-L-D-WT is selected when solder joint retention during assembly or rework operations is required, particularly in high-vibration or thermal cycling environments.

TFM-125-02-L-D-DS is selected when a mating flange is necessary for mechanical alignment or strain relief at the connector interface.

TFM-125-02-L-D-A is selected when board-level guidance during mating is required to ensure proper connector alignment without external fixtures.

TFM-125-02-L-D-LC is selected when positive mechanical locking between mated connectors is required to prevent accidental disconnection.

TFM-125-02-L-D-A-K is selected when both board guidance and automated pick-and-place assembly optimization are required in high-volume manufacturing environments.

All parts are Active status and ROHS3 compliant, supporting current production and regulatory requirements. Inventory availability varies across variants; consult current stock levels for procurement planning.

Frequently Asked Questions (FAQ)

Q: Are all substitute parts electrically interchangeable with the TFM-125-02-L-D?

A: Yes. All substitute parts maintain identical electrical specifications: 50 positions, 2 rows, 0.050" (1.27mm) pitch, 2.9A per contact current rating, and 275VAC voltage rating. Feature additions do not alter electrical performance or signal integrity.

Q: Do the feature additions affect PCB layout or footprint?

A: Feature additions such as board guides, board locks, and mating flanges may require minor PCB layout adjustments to accommodate mechanical structures. Consult Samtec documentation for specific dimensional requirements for each variant.

Q: Can I substitute TFM-125-02-L-D with TFM-125-02-L-D-A-K in existing designs?

A: Substitution is electrically valid. However, the board guide and pick-and-place features in the -A-K variant may require PCB layout verification to ensure clearance and proper alignment. Mechanical compatibility must be confirmed before design implementation.

Q: What is the difference between board guide and board lock features?

A: Board guide (TFM-125-02-L-D-A) provides passive alignment assistance during connector mating. Board lock (TFM-125-02-L-D-LC) provides positive mechanical retention after mating to prevent accidental disconnection. These features serve different mechanical requirements and are not interchangeable.

Q: Are all variants available in the same packaging and MSL rating?

A: Yes. All substitute parts are supplied in tube packaging with MSL 1 (Unlimited) rating, supporting standard storage and handling conditions without moisture bake-out requirements.

Q: Which variant should I select for high-vibration applications?

A: TFM-125-02-L-D-WT (solder retention) is recommended for high-vibration environments to ensure solder joint integrity. For mechanical retention after mating, TFM-125-02-L-D-LC (board lock) provides positive locking to prevent connector separation.