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

Part Overview

The HTST-120-04-F-D-RA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-cable/wire applications. This shrouded 40-position connector operates across -55°C to 125°C and is currently in active production status. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when inventory constraints require component flexibility within equivalent electrical and mechanical specifications.

Substiute Parts

HTST-120-04-F-D-RA

Samtec Inc.In Stock: 1158HTST-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 HTST-120-04-F-D-RA is determined by strict equivalence across the following critical parameters:

• Number of Positions: 40
• Number of Rows: 2
• Pitch - Mating: 0.100" (2.54mm)
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole, Right Angle
• Shrouding: Shrouded - 4 Wall
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Type: Male Pin
• Contact Length - Mating: 0.250" (6.35mm)
• Contact Length - Post: 0.130" (3.30mm)
• Insulation Height: 0.365" (9.27mm)
• Contact Shape: Square
• Contact Finish - Mating: Gold
• Contact Finish - Post: Tin
• Contact Material: Phosphor Bronze
• Current Rating: 3.4A per Contact
• Operating Temperature: -55°C ~ 125°C
• Material Flammability Rating: UL94 V-0
• RoHS Status: ROHS3 Compliant

The identified substitute TST-120-04-S-D-RA-20 meets all critical electrical and mechanical parameters. Variations in insulation material composition and color do not affect functional compatibility within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Both the HTST-120-04-F-D-RA and TST-120-04-S-D-RA-20 are active production components from Samtec Inc. with identical electrical and mechanical specifications across all critical parameters. Both parts are ROHS3 compliant and carry UL94 V-0 material flammability certification, meeting regulatory requirements for industrial and commercial applications.

The TST-120-04-S-D-RA-20 serves as a direct functional equivalent. The difference in insulation material composition (LCP versus glass-filled PBT) and insulation color (natural versus black) does not affect electrical performance, thermal characteristics, or mechanical compatibility within the specified operating temperature range of -55°C to 125°C.

Selection between these parts should be based on availability, lead time, and any design-specific requirements related to insulation material properties or visual identification needs.

Frequently Asked Questions (FAQ)

Q: Can TST-120-04-S-D-RA-20 be used as a direct replacement for HTST-120-04-F-D-RA in existing designs?

A: Yes. Both connectors share identical electrical and mechanical specifications, including pitch, position count, contact materials, current rating, and operating temperature range. The parts are mechanically and electrically interchangeable.

Q: What is the difference between the insulation materials used in these connectors?

A: HTST-120-04-F-D-RA uses Liquid Crystal Polymer (LCP), while TST-120-04-S-D-RA-20 uses Polybutylene Terephthalate (PBT) with glass filler. Both materials meet UL94 V-0 flammability requirements and operate identically across the specified temperature range.

Q: Does the insulation color difference affect connector performance?

A: No. Insulation color is a visual identifier only and does not affect electrical performance, mechanical fit, or thermal characteristics.

Q: Are both parts RoHS compliant?

A: Yes. Both HTST-120-04-F-D-RA and TST-120-04-S-D-RA-20 are ROHS3 compliant.

Q: What is the current rating per contact for these connectors?

A: Both connectors are rated for 3.4A per contact.

Q: What is the operating temperature range for these parts?

A: Both connectors operate across -55°C to 125°C.

Q: Are these connectors suitable for through-hole PCB assembly?

A: Yes. Both parts are designed for through-hole, right-angle mounting with solder termination.