TFM-145-12-S-D Equivalent & Substitute Parts

Part Overview

The TFM-145-12-S-D is a surface mount rectangular connector header manufactured by Samtec Inc. in the Tiger Eye™ TFM series. This 90-position, dual-row connector operates at 0.050" (1.27mm) pitch and is designed for board-to-board or cable applications with push-pull fastening. The part is Active status and ROHS3 compliant, making it suitable for current production designs. Equivalent and substitute parts are identified when identical electrical and mechanical parameters are maintained across the connector family, or when minor design enhancements such as board lock features are introduced without altering core mating characteristics.

Substiute Parts

TFM-145-12-S-D

Samtec Inc.In Stock: 891TFM-145-12-S-D Datasheet

Current PartRFQ

TFM-145-12-S-D-LC

Samtec Inc.In Stock: 1174TFM-145-12-S-D-LC Datasheet

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TFM-145-22-S-D-LC

Samtec Inc.In Stock: 649TFM-145-22-S-D-LC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution within the TFM-145 rectangular connector family is determined by strict equivalence in the following critical parameters:

• Number of positions (90)
• Number of rows (2)
• Pitch - mating (0.050" / 1.27mm)
• Row spacing - mating (0.050" / 1.27mm)
• Contact type (Male Pin)
• Mounting type (Surface Mount)
• Shrouding (Shrouded - 4 Wall)
• Fastening type (Push-Pull)
• Current rating (2.9A per Contact)
• Voltage rating (275VAC)
• Operating temperature range (-55°C ~ 125°C)
• Material flammability rating (UL94 V-0)
• RoHS compliance (ROHS3)

The TFM-145-12-S-D has two identified substitutes within the same series. Both maintain identical electrical and mechanical mating characteristics. The primary difference is the introduction of a Board Lock feature in the substitute parts, which enhances mechanical retention without affecting electrical performance or mating interface geometry.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and ROHS3 compliance, qualifying them for current production use. The TFM-145-12-S-D and TFM-145-12-S-D-LC are electrically and mechanically identical at the mating interface, with the latter offering Board Lock functionality for enhanced mechanical retention. The TFM-145-22-S-D-LC differs only in insulation height (0.360" versus 0.290"), which may affect PCB layout and stacking height considerations but does not alter electrical performance or mating characteristics. Selection between these parts depends on mechanical retention requirements and available board space for insulation height accommodation.

Frequently Asked Questions (FAQ)

Q: Can TFM-145-12-S-D-LC be used as a direct replacement for TFM-145-12-S-D?

A: Yes. Both parts maintain identical mating pitch (0.050" / 1.27mm), number of positions (90), contact type (Male Pin), current rating (2.9A per Contact), voltage rating (275VAC), and operating temperature range (-55°C ~ 125°C). The Board Lock feature in the -LC variant provides additional mechanical retention without affecting electrical or mating interface compatibility.

Q: What is the difference between TFM-145-12-S-D-LC and TFM-145-22-S-D-LC?

A: The primary difference is insulation height. TFM-145-12-S-D-LC has an insulation height of 0.290" (7.37mm), while TFM-145-22-S-D-LC has an insulation height of 0.360" (9.14mm). All other electrical and mechanical parameters remain identical. The selection depends on available PCB space and mated stacking height requirements.

Q: Are all three parts ROHS3 compliant?

A: Yes. TFM-145-12-S-D, TFM-145-12-S-D-LC, and TFM-145-22-S-D-LC are all ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What does the Board Lock feature provide?

A: Board Lock enhances mechanical retention of the connector to the PCB during mating and unmating cycles. It does not alter electrical performance, mating interface geometry, or pitch specifications.

Q: Can these connectors be used interchangeably in the same application?

A: TFM-145-12-S-D and TFM-145-12-S-D-LC are fully interchangeable. TFM-145-22-S-D-LC can be used as a substitute if the increased insulation height (0.360" versus 0.290") is accommodated in the PCB layout and does not conflict with component placement or stacking requirements.