TFC-110-21-L-D Equivalent & Substitute Parts

Part Overview

The TFC-110-21-L-D is a Samtec Tiger Eye™ TFC series rectangular connector header designed for through-hole board-to-board or cable applications. This 20-position, 2-row shrouded header operates across -55°C to 125°C and carries a 3.1A per contact current rating at 275VAC. The part is Active status and ROHS3 compliant with UL94 V-0 flammability rating. Substitute parts are identified to support inventory management, design flexibility, and supply chain continuity while maintaining electrical and mechanical compatibility.

Substiute Parts

TFC-110-21-L-D

Samtec Inc.In Stock: 1224TFC-110-21-L-D Datasheet

Current PartRFQ

TFC-110-31-L-D-A

Samtec Inc.In Stock: 1048TFC-110-31-L-D-A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TFC-110-21-L-D is determined by strict equivalence across the following critical parameters:

• Connector type, contact type, and mating interface (Header, Male Pin, Board to Board or Cable)
• Position count and row configuration (20 positions, 2 rows)
• Pitch specifications (0.050" mating pitch, 0.050" row spacing)
• Electrical ratings (3.1A per contact, 275VAC)
• Operating temperature range (-55°C ~ 125°C)
• Contact materials and finishes (Phosphor Bronze, Gold mating finish, Tin post finish)
• Insulation material (Liquid Crystal Polymer)
• Compliance certifications (ROHS3, UL94 V-0)
• Mounting method (Through Hole, Solder termination, Push-Pull fastening)

The substitute part TFC-110-31-L-D-A maintains all critical electrical and mechanical parameters while introducing a mechanical variation: increased insulation height (0.435" vs. 0.290") and the addition of a board guide feature. These differences do not affect electrical compatibility or current/voltage performance.

Parameter Comparison

Engineering Selection Recommendations

Both TFC-110-21-L-D and TFC-110-31-L-D-A are Active status products manufactured by Samtec Inc. within the Tiger Eye™ TFC series. Both maintain full ROHS3 compliance and UL94 V-0 flammability certification, meeting regulatory requirements for industrial and commercial applications.

The primary distinction is mechanical: TFC-110-31-L-D-A provides increased insulation height (0.435" versus 0.290") and incorporates a board guide feature. This variation does not alter electrical performance, current capacity, voltage rating, or temperature operating range. Selection between these parts depends on PCB layout requirements and mechanical clearance specifications. The board guide feature in TFC-110-31-L-D-A provides enhanced alignment during mating operations.

Both parts are suitable for applications requiring 20-position, 0.050" pitch through-hole headers with gold-plated mating contacts and tin-plated posts. Inventory availability should be considered: TFC-110-21-L-D has 1119 pieces in stock; TFC-110-31-L-D-A has 940 pieces in stock.

Frequently Asked Questions (FAQ)

Q: Can TFC-110-31-L-D-A be used as a direct replacement for TFC-110-21-L-D?

A: Yes, from an electrical and functional standpoint. Both parts share identical contact configurations, pitch, current and voltage ratings, and operating temperature ranges. The primary difference is the increased insulation height (0.435" vs. 0.290") and board guide feature in the substitute part. PCB layout and mechanical clearance must accommodate the taller insulation profile.

Q: What is the significance of the board guide feature in TFC-110-31-L-D-A?

A: The board guide is a mechanical feature that aids in connector alignment during mating. It does not affect electrical performance or contact integrity. Its inclusion is a design enhancement for assembly operations.

Q: Are both parts RoHS compliant?

A: Yes. Both TFC-110-21-L-D and TFC-110-31-L-D-A are ROHS3 compliant and carry UL94 V-0 flammability certification.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without special moisture control measures.

Q: Do these connectors support the same current and voltage ratings?

A: Yes. Both parts are rated for 3.1A per contact and 275VAC, with identical operating temperature ranges of -55°C to 125°C.

Q: What contact materials are used in these headers?

A: Both parts use phosphor bronze contacts with gold plating (10.0µin thickness) on the mating surface and tin plating on the post. Insulation is Liquid Crystal Polymer (LCP).

Q: Are there any differences in packaging or availability?

A: Both parts are supplied in tube packaging. Current inventory shows 1119 pieces for TFC-110-21-L-D and 940 pieces for TFC-110-31-L-D-A.