TFM-105-21-L-D Equivalent & Substitute Parts

Part Overview

The TFM-105-21-L-D is an active Samtec Tiger Eye™ TFM series rectangular connector header designed for through-hole board-to-board or cable applications. This shrouded 4-wall header accommodates 10 positions arranged in 2 rows with 0.050" (1.27mm) pitch spacing. The connector features gold-plated mating contacts and tin-plated posts with solder termination, operating across -55°C to 125°C with a 2.9A per contact current rating. Substitute parts are identified to support inventory management, supply chain continuity, and design flexibility while maintaining electrical and mechanical compatibility.

Substiute Parts

TFM-105-21-L-D

Samtec Inc.In Stock: 1031TFM-105-21-L-D Datasheet

Current PartRFQ

TFM-105-31-L-D

Samtec Inc.In Stock: 786TFM-105-31-L-D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TFM-105-21-L-D and TFM-105-31-L-D are functionally equivalent within the Tiger Eye™ TFM series based on the following critical parameters:

• Identical connector type, contact type, and position configuration (10-position, 2-row header)
• Matching pitch spacing (0.050" mating pitch and row spacing)
• Identical electrical ratings (2.9A per contact, 275VAC)
• Identical operating temperature range (-55°C ~ 125°C)
• Identical contact materials, finishes, and termination method
• Both shrouded 4-wall through-hole solder-terminated headers
• Both ROHS3 compliant with UL94 V-0 flammability rating

The primary difference between these parts is insulation height: TFM-105-21-L-D features 0.360" (9.14mm) insulation height, while TFM-105-31-L-D features 0.435" (11.05mm) insulation height. This dimensional variation allows selection based on specific board layout and clearance requirements.

Parameter Comparison

Engineering Selection Recommendations

Both TFM-105-21-L-D and TFM-105-31-L-D are active products with identical electrical performance, compliance certifications, and regulatory status. Selection between these parts is determined by board layout constraints and available vertical clearance. The TFM-105-21-L-D with 0.360" insulation height is suitable for compact designs with limited vertical space. The TFM-105-31-L-D with 0.435" insulation height accommodates applications requiring greater standoff distance from the PCB surface. Both parts maintain full ROHS3 compliance and UL94 V-0 flammability certification, supporting equivalent design qualification and manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Are TFM-105-21-L-D and TFM-105-31-L-D electrically interchangeable?

A: Yes. Both parts share identical electrical specifications including 2.9A per contact current rating, 275VAC voltage rating, contact materials, finishes, and operating temperature range. Electrical performance is equivalent across all rated conditions.

Q: What is the primary difference between these two part numbers?

A: The insulation height differs. TFM-105-21-L-D has 0.360" (9.14mm) insulation height, while TFM-105-31-L-D has 0.435" (11.05mm) insulation height. This affects the vertical profile of the assembled connector on the PCB.

Q: Can I substitute TFM-105-31-L-D for TFM-105-21-L-D in an existing design?

A: Substitution is possible only if the PCB layout and enclosure design accommodate the increased 0.435" insulation height. Verify clearance above the connector before implementing this substitution.

Q: Can I substitute TFM-105-21-L-D for TFM-105-31-L-D in an existing design?

A: Substitution is possible only if the design does not require the additional standoff height provided by the 0.435" insulation. Verify that the reduced 0.360" height meets mechanical and electrical clearance requirements.

Q: Are both parts available in the same packaging?

A: Yes. Both TFM-105-21-L-D and TFM-105-31-L-D are supplied in tube packaging.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant, UL94 V-0 rated, and carry EAR99 ECCN classification with identical HTSUS coding.