TSS-120-04-F-D-RA Equivalent & Substitute Parts

Part Overview

The TSS-120-04-F-D-RA is a rectangular connector header manufactured by Samtec Inc., part of the Flex Stack TSS series. This through-hole, right-angle header connector features 40 positions across 2 rows with 0.100" (2.54mm) pitch spacing. The connector is actively produced and stocked with 881 pieces available in new original condition. Alternative models become necessary when specific application requirements demand different connector styles, material compositions, or fastening mechanisms while maintaining core electrical and mechanical compatibility.

Substiute Parts

TSS-120-04-F-D-RA

Samtec Inc.In Stock: 929TSS-120-04-F-D-RA Datasheet

Current PartRFQ

TST-120-04-S-D-RA-20

Samtec Inc.In Stock: 1188TST-120-04-S-D-RA-20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TSS-120-04-F-D-RA is determined by strict alignment of the following parameters:

• Connector Position Count: 40 positions required
• Row Configuration: 2 rows mandatory
• Pitch Specification: 0.100" (2.54mm) mating pitch and row spacing
• Mounting Orientation: Through hole, right-angle mounting
• Shrouding Configuration: Shrouded - 4 wall design
• Contact Material & Finish: Phosphor bronze with gold mating surface and tin post finish
• Insulation Material: Polybutylene terephthalate (PBT)
• Operating Temperature: -55°C ~ 125°C range
• Compliance: ROHS3 compliant, UL94 V-0 flammability rating

The substitute part TST-120-04-S-D-RA-20 meets all critical substitution criteria within these parameters.

Parameter Comparison

Engineering Selection Recommendations

Both the TSS-120-04-F-D-RA and TST-120-04-S-D-RA-20 are active products manufactured by Samtec Inc. and maintain full ROHS3 compliance with UL94 V-0 flammability certification. The connectors are electrically and mechanically interchangeable across all critical mating and mounting parameters.

The primary distinction between these parts lies in series designation (TSS versus TST) and application style classification. The TST-120-04-S-D-RA-20 explicitly specifies a current rating of 3.4A per contact and identifies board-to-cable/wire connectivity as its primary application, whereas the TSS-120-04-F-D-RA is designated for board-to-board or cable applications without a specified current rating.

The TST-120-04-S-D-RA-20 incorporates glass-filled polybutylene terephthalate insulation material, which provides enhanced mechanical and thermal properties compared to standard PBT. This material enhancement maintains full compatibility with the original part's electrical and thermal specifications.

Selection between these parts should be based on application requirements: choose the TST-120-04-S-D-RA-20 when cable/wire connectivity is the primary interface and when the 3.4A per contact rating aligns with system current requirements.

Frequently Asked Questions (FAQ)

Q: Are TSS-120-04-F-D-RA and TST-120-04-S-D-RA-20 directly interchangeable?

A: Yes. Both connectors share identical mating pitch (0.100"), position count (40), row configuration (2 rows), mounting type (through-hole right-angle), shrouding design (4-wall), contact geometry, and operating temperature range (-55°C ~ 125°C). All critical electrical and mechanical parameters align for direct substitution.

Q: What is the difference between the TSS and TST series designations?

A: The TSS and TST series are both part of Samtec's Flex Stack connector family. The primary distinction is application classification: TSS is designated for board-to-board or cable applications, while TST is optimized for board-to-cable/wire connectivity. Both series maintain identical physical and electrical specifications for the 40-position, 2-row, 2.54mm pitch configuration.

Q: Does the glass-filled PBT insulation in the TST-120-04-S-D-RA-20 affect compatibility?

A: No. Glass-filled polybutylene terephthalate is a material enhancement that provides superior mechanical strength and thermal stability while maintaining full electrical compatibility. The glass-filled variant meets all operating temperature and flammability requirements of the original part.

Q: What does the 3.4A per contact rating on the TST-120-04-S-D-RA-20 indicate?

A: This specifies the maximum continuous current each individual contact can safely carry. The TSS-120-04-F-D-RA does not provide a published current rating. If your application requires current handling specifications, the TST-120-04-S-D-RA-20 provides explicit electrical performance data.

Q: Are both parts RoHS compliant?

A: Yes. Both TSS-120-04-F-D-RA and TST-120-04-S-D-RA-20 are ROHS3 compliant and carry UL94 V-0 flammability certification, meeting current environmental and safety standards.

Q: Which part should I select for new designs?

A: Selection depends on your specific application interface. For board-to-cable/wire connections with defined current requirements, the TST-120-04-S-D-RA-20 is the appropriate choice. For general board-to-board or cable applications without specific current specifications, either part is suitable. Both are active products with established supply availability.