HTST-120-01-S-DV Equivalent & Substitute Parts

Part Overview

The HTST-120-01-S-DV is a surface mount rectangular connector header manufactured by Samtec Inc. in the Flex Stack series. This 40-position, 2-row connector with 0.100" (2.54mm) pitch is designed for board-to-cable/wire applications with push-pull fastening and shrouded 4-wall construction. The part is active in production with 887 units in current inventory. Equivalent parts are identified when design requirements permit substitution based on matching electrical and mechanical parameters within acceptable tolerances.

Substiute Parts

HTST-120-01-S-DV

Samtec Inc.In Stock: 956HTST-120-01-S-DV Datasheet

Current PartRFQ

N2540-6V0C-RB-WG

3MIn Stock: 4734N2540-6V0C-RB-WG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The N2540-6V0C-RB-WG manufactured by 3M qualifies as an equivalent substitute based on the following matching parameters:

Connector configuration: Both parts are 40-position, 2-row headers with 0.100" (2.54mm) pitch and row spacing, maintaining identical footprint and mating interface geometry.

Mounting and termination: Both employ surface mount technology with solder termination and push-pull fastening, ensuring compatibility with existing PCB assembly processes.

Electrical characteristics: Both feature gold-plated mating contacts with 30.0µin (0.76µm) thickness and tin-plated posts, providing equivalent contact reliability and signal integrity.

Mechanical construction: Both incorporate shrouded 4-wall design with square contact geometry and keying slot features for polarization and mechanical alignment.

Compliance and environmental: Both maintain UL94 V-0 flammability rating, RoHS compliance, MSL 1 rating, and REACH unaffected status, ensuring regulatory equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the HTST-120-01-S-DV and N2540-6V0C-RB-WG maintain active product status with full RoHS3/RoHS compliance and REACH unaffected certification, confirming regulatory equivalence for current applications.

The primary design consideration is current rating: the HTST-120-01-S-DV supports 3.4A per contact, while the N2540-6V0C-RB-WG supports 1.75A per contact. Selection must be based on actual circuit current requirements. Applications requiring the full 3.4A rating must use the HTST-120-01-S-DV.

Operating temperature range differs: HTST-120-01-S-DV operates to 125°C, while N2540-6V0C-RB-WG operates to 105°C. Applications requiring sustained operation above 105°C require the HTST-120-01-S-DV.

Insulation material composition differs (LCP versus PCT glass-filled), but both achieve UL94 V-0 flammability rating. Contact material differs (Phosphor Bronze versus Copper Alloy), but both provide equivalent gold-plated mating surfaces with identical finish thickness.

Mechanical dimensions show minor variations: contact length mating differs by 0.007" (0.18mm) and insulation height differs by 0.040" (1.02mm). These variations are within typical connector tolerance ranges and do not affect standard mating interface compatibility.

Frequently Asked Questions (FAQ)

Q: Can N2540-6V0C-RB-WG directly replace HTST-120-01-S-DV in existing designs?

A: Direct replacement is possible only when circuit current requirements do not exceed 1.75A per contact and maximum operating temperature does not exceed 105°C. The identical 40-position, 2-row 0.100" pitch configuration ensures mechanical and electrical interface compatibility. Verify actual application current and temperature specifications before substitution.

Q: What are the key differences between these two connectors?

A: Current rating (3.4A versus 1.75A per contact), maximum operating temperature (125°C versus 105°C), insulation material composition (LCP versus PCT glass-filled), and contact material (Phosphor Bronze versus Copper Alloy) represent the primary differences. Mating contact geometry, pitch, row spacing, shrouding, and fastening type are identical.

Q: Are there packaging considerations for these parts?

A: HTST-120-01-S-DV is supplied in Tube packaging, while N2540-6V0C-RB-WG is supplied in Cut Tape (CT) packaging. Packaging selection depends on assembly process requirements and inventory management practices. Both maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: Do both connectors meet current compliance requirements?

A: Both parts are RoHS compliant, REACH unaffected, and maintain UL94 V-0 flammability certification. HTST-120-01-S-DV carries ROHS3 compliance, while N2540-6V0C-RB-WG carries standard RoHS compliance. Both are suitable for current regulatory environments.

Q: What is the impact of the 0.007" difference in mating contact length?

A: The contact length difference (0.250" versus 0.243") falls within standard connector tolerance ranges and does not affect mating interface performance or mechanical alignment. Both connectors maintain equivalent contact engagement depth with standard mating receptacles.