TFM-140-21-L-D Equivalent & Substitute Parts

Part Overview

The TFM-140-21-L-D is an 80-position vertical header connector from Samtec Inc.'s Tiger Eye™ TFM series, designed for through-hole board-to-board or cable applications. This shrouded 4-wall connector operates across -55°C to 125°C with a 2.9A per contact current rating and 275VAC voltage rating. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed specifications for this connector category, enabling design flexibility and supply chain alternatives.

Substiute Parts

TFM-140-21-L-D

Samtec Inc.In Stock: 1040TFM-140-21-L-D Datasheet

Current PartRFQ

TFM-140-11-L-D

Samtec Inc.In Stock: 849TFM-140-11-L-D Datasheet

SimilarRFQ

TFM-140-31-L-D

Samtec Inc.In Stock: 1215TFM-140-31-L-D Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TFM-140-21-L-D are qualified based on strict equivalence in the following critical parameters:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 80
• Number of Rows: 2
• Pitch - Mating: 0.050" (1.27mm)
• Row Spacing - Mating: 0.050" (1.27mm)
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Length - Mating: 0.139" (4.63mm)
• Contact Length - Post: 0.080" (2.03mm)
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Finish Thickness - Mating: 15.0µin (0.38µm)
• Contact Finish - Post: Tin
• Contact Material: Phosphor Bronze
• Insulation Material: Liquid Crystal Polymer (LCP)
• Operating Temperature: -55°C ~ 125°C
• Current Rating: 2.9A per Contact
• Voltage Rating: 275VAC
• Material Flammability Rating: UL94 V-0
• RoHS Status: ROHS3 Compliant

The identified substitutes TFM-140-11-L-D and TFM-140-31-L-D maintain all critical electrical and mechanical parameters. The primary difference among these parts is the Insulation Height, which varies to accommodate different application stack heights while preserving all functional and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TFM-140-21-L-D, TFM-140-11-L-D, and TFM-140-31-L-D—are Active status products from Samtec Inc. and maintain full ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts is determined by the required Insulation Height for your specific application stack height:

• TFM-140-11-L-D: 0.290" (7.37mm) insulation height for compact applications
• TFM-140-21-L-D: 0.360" (9.14mm) insulation height for standard applications
• TFM-140-31-L-D: 0.435" (11.05mm) insulation height for applications requiring greater stack height

All three parts deliver identical electrical performance, contact ratings, and environmental specifications. The choice depends solely on mechanical fit within your PCB assembly and mating connector stack configuration.

Frequently Asked Questions (FAQ)

Q: Can TFM-140-11-L-D, TFM-140-21-L-D, and TFM-140-31-L-D be used interchangeably?

A: These parts are electrically and functionally equivalent. They differ only in Insulation Height. Interchangeability depends on whether your application accommodates the specific height variant. Verify your PCB layout and mating connector clearance before substitution.

Q: What determines the choice between these three part numbers?

A: The Insulation Height is the only differentiating parameter. Select based on your application's vertical space constraints and mating connector stack height requirements. All other electrical, mechanical, and environmental specifications are identical.

Q: Are all three parts currently available?

A: All three parts maintain Active product status. Inventory availability varies: TFM-140-21-L-D (966 pcs), TFM-140-11-L-D (757 pcs), and TFM-140-31-L-D (1147 pcs).

Q: Do these parts require different PCB footprints?

A: No. All three parts share identical pitch (0.050"), row spacing (0.050"), contact dimensions, and mounting type. PCB footprints are identical; only the vertical clearance requirement differs based on Insulation Height.

Q: Are compliance certifications identical across all three parts?

A: Yes. All three parts are ROHS3 compliant, UL94 V-0 rated, and classified as EAR99 for export control purposes. HTSUS code 8536.69.4040 applies to all variants.