HTSS-120-04-G-D-LA Equivalent & Substitute Parts

Part Overview

The HTSS-120-04-G-D-LA is a rectangular connector header manufactured by Samtec Inc., designed for through-hole, right-angle board-to-board or cable applications. This shrouded 40-position connector operates across -55°C to 125°C and features gold-plated phosphor bronze contacts with kinked pin solder termination. The part maintains Active product status with 803 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, application-specific design requirements, or manufacturing discontinuation notices.

Substiute Parts

HTSS-120-04-G-D-LA

Samtec Inc.In Stock: 893HTSS-120-04-G-D-LA Datasheet

Current PartRFQ

TST-120-04-G-D-LA

Samtec Inc.In Stock: 1108TST-120-04-G-D-LA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HTSS-120-04-G-D-LA is determined by strict equivalence across the following critical parameters:

• Connector Configuration: 40-position, 2-row header with 0.100" (2.54mm) pitch and row spacing
• Mounting and Termination: Through-hole, right-angle orientation with kinked pin solder termination
• Electrical Properties: Male pin contact type with gold-plated phosphor bronze contacts
• Mechanical Shrouding: Shrouded 4-wall design with keying slot
• Environmental Compliance: Operating temperature range -55°C to 125°C, UL94 V-0 flammability rating, ROHS3 compliance, and MSL 1 rating

The TST-120-04-G-D-LA qualifies as a substitute based on matching all critical parameters. Differences in insulation material (PBT Glass Filled versus LCP) and insulation color do not affect functional interchangeability when electrical and mechanical specifications remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both HTSS-120-04-G-D-LA and TST-120-04-G-D-LA maintain Active product status with full ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts should be based on:

• Inventory Availability: HTSS-120-04-G-D-LA has 803 units in stock; TST-120-04-G-D-LA has 1012 units in stock
• Insulation Material Requirements: HTSS uses LCP insulation; TST uses glass-filled PBT insulation. Application thermal cycling and chemical exposure profiles should determine material selection
• Current Rating Specification: TST-120-04-G-D-LA specifies 3.4A per contact; HTSS-120-04-G-D-LA does not provide this specification. For applications requiring documented current ratings, TST-120-04-G-D-LA provides explicit electrical performance data
• Series Compatibility: HTSS belongs to the Flex Stack HTSS series; TST belongs to the Flex Stack TST series. Verify mating connector compatibility with the corresponding series

Frequently Asked Questions (FAQ)

Q: Can TST-120-04-G-D-LA directly replace HTSS-120-04-G-D-LA in existing designs?

A: Yes, provided the application does not have specific insulation material requirements. Both parts share identical connector configuration, pitch, row spacing, mounting type, contact geometry, and termination method. The primary difference is insulation material composition (LCP versus glass-filled PBT).

Q: What is the significance of the insulation material difference?

A: LCP (Liquid Crystal Polymer) and glass-filled PBT (Polybutylene Terephthalate) have different thermal and chemical properties. LCP offers superior dimensional stability and lower moisture absorption. Glass-filled PBT provides enhanced mechanical strength. Application environment determines which material is appropriate.

Q: Are the contact specifications identical between these parts?

A: Yes. Both parts use phosphor bronze contacts with identical mating contact length (0.250"), post length (0.130"), and gold plating thickness (10.0µin mating, 3.0µin post). Contact shape, finish, and material are equivalent.

Q: Does the current rating difference affect substitution?

A: The TST-120-04-G-D-LA explicitly specifies 3.4A per contact, while the HTSS-120-04-G-D-LA does not provide this specification. For applications requiring documented current capacity, TST-120-04-G-D-LA provides explicit electrical performance data. Verify application current requirements against available specifications.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both parts operate across -55°C to 125°C and maintain UL94 V-0 flammability compliance across this range.

Q: What is the difference between "Board to Board or Cable" and "Board to Cable/Wire" style designations?

A: HTSS-120-04-G-D-LA is designated for board-to-board or cable applications. TST-120-04-G-D-LA is designated for board-to-cable/wire applications. Verify mating connector type compatibility with your specific application interface.