Samtec TFM-140-21-S-D Equivalent & Substitute Parts

Part Overview

The Samtec TFM-140-21-S-D is an 80-position rectangular connector header from the Tiger Eye™ TFM series, designed for through-hole board-to-board or cable applications. This shrouded 4-wall header features 1.27mm (0.050") pitch mating contacts with solder termination and push-pull fastening. The part is currently active in production with 904 units in stock. Substitute parts are identified to address inventory availability, specific mechanical features, or application-specific requirements while maintaining core electrical and mechanical compatibility.

Substiute Parts

TFM-140-21-S-D

Samtec Inc.In Stock: 1006TFM-140-21-S-D Datasheet

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TFM-140-11-S-D

Samtec Inc.In Stock: 1106TFM-140-11-S-D Datasheet

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TFM-140-11-S-D-LC

Samtec Inc.In Stock: 968TFM-140-11-S-D-LC Datasheet

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TFM-140-21-S-D-LC

Samtec Inc.In Stock: 965TFM-140-21-S-D-LC Datasheet

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TFM-140-31-S-D-A

Samtec Inc.In Stock: 974TFM-140-31-S-D-A Datasheet

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TFM-140-31-S-D-LC

Samtec Inc.In Stock: 1093TFM-140-31-S-D-LC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TFM-140-21-S-D is determined by strict equivalence in the following core parameters:

• Manufacturer: Samtec Inc.
• Series: Tiger Eye™ TFM
• Number of Positions: 80
• 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: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Shrouding: Shrouded - 4 Wall
• Current Rating: 2.9A per Contact
• Voltage Rating: 275VAC
• Operating Temperature: -55°C ~ 125°C
• Contact Material: Phosphor Bronze
• Contact Finish - Mating: Gold
• Insulation Material: Liquid Crystal Polymer (LCP)
• Material Flammability Rating: UL94 V-0
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts differ only in insulation height and optional mechanical features (Board Lock or Board Guide), which do not affect electrical performance or core mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain identical electrical specifications, contact ratings, and environmental compliance with the TFM-140-21-S-D. Selection among equivalent parts is determined by mechanical form factor requirements:

TFM-140-11-S-D and TFM-140-11-S-D-LC provide reduced insulation height (0.290") for space-constrained applications. The -LC variant adds Board Lock feature for enhanced mating stability.

TFM-140-21-S-D-LC matches the original part's insulation height (0.360") while incorporating Board Lock feature for applications requiring positive mating retention.

TFM-140-31-S-D-A and TFM-140-31-S-D-LC offer increased insulation height (0.435") for applications requiring additional board clearance or mechanical support. TFM-140-31-S-D-A includes Board Guide feature; TFM-140-31-S-D-LC includes Board Lock feature.

All parts are ROHS3 compliant, active in production, and carry identical electrical ratings and operating temperature ranges. Selection should be based on PCB layout requirements and mechanical interface specifications.

Frequently Asked Questions (FAQ)

Q: Can TFM-140-11-S-D replace TFM-140-21-S-D directly?

A: Electrically and functionally, yes. The difference is insulation height: 0.290" versus 0.360". Verify PCB layout and clearance requirements before substitution.

Q: What is the difference between Board Lock and Board Guide features?

A: Board Lock (-LC suffix) provides positive mating retention through locking mechanism. Board Guide (-A suffix) provides alignment support without locking. Neither affects electrical performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts are ROHS3 compliant with identical material flammability ratings (UL94 V-0) and moisture sensitivity levels (MSL 1).

Q: Do insulation height variations affect electrical ratings?

A: No. Current rating (2.9A per Contact) and voltage rating (275VAC) remain constant across all substitute parts.

Q: Which substitute part has the highest inventory availability?

A: TFM-140-31-S-D-LC with 1063 units in stock.

Q: Can I use TFM-140-31-S-D-A in place of TFM-140-21-S-D?

A: Electrically, yes. Mechanically, verify that the increased insulation height (0.435" versus 0.360") and Board Guide feature are compatible with your PCB design and mating connector specifications.