HTST-125-01-S-D Equivalent & Substitute Parts

Part Overview

The HTST-125-01-S-D is a rectangular connector header manufactured by Samtec Inc., designed for through-hole mounting applications. This 50-position, 2-row connector operates across a temperature range of -55°C to 125°C and features shrouded 4-wall construction with push-pull fastening. The part is currently active in production and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are required for design flexibility, inventory management, or supply chain continuity.

Substiute Parts

HTST-125-01-S-D

Samtec Inc.In Stock: 859HTST-125-01-S-D Datasheet

Current PartRFQ

N2550-6002-RB

3MIn Stock: 1202N2550-6002-RB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The N2550-6002-RB from 3M qualifies as a substitute based on the following critical parameters:

• Identical connector type (Header) and contact type (Male Pin)
• Matching position count (50 positions) and row configuration (2 rows)
• Identical mating pitch (0.100" / 2.54mm) and row spacing (0.100" / 2.54mm)
• Equivalent mounting method (Through Hole) and shrouding design (Shrouded - 4 Wall)
• Matching fastening type (Push-Pull) and termination method (Solder)
• Equivalent contact finish specifications (Gold mating surface, Tin post finish)
• Compliant with same flammability standard (UL94 V-0) and RoHS3 requirements

Substitution is valid within the overlapping operating temperature range of -55°C to 105°C.

Parameter Comparison

Engineering Selection Recommendations

Both the HTST-125-01-S-D and N2550-6002-RB are active production parts with ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts should be based on application-specific operating temperature requirements. The HTST-125-01-S-D supports operation up to 125°C, while the N2550-6002-RB is rated to 105°C. For applications operating within the -55°C to 105°C range, either part is functionally equivalent. For applications requiring sustained operation above 105°C, the HTST-125-01-S-D is the appropriate choice. Current rating differences (3.4A per contact for HTST-125-01-S-D versus 1.75A for N2550-6002-RB) must be evaluated against circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can N2550-6002-RB be used as a direct replacement for HTST-125-01-S-D in all applications?

A: Direct substitution is valid for applications operating within the overlapping temperature range of -55°C to 105°C. Applications requiring operation above 105°C require the HTST-125-01-S-D. Current rating specifications must also be verified against circuit requirements.

Q: Are the physical dimensions compatible between these two parts?

A: Both parts share identical mating pitch (0.100" / 2.54mm), row spacing (0.100" / 2.54mm), and 50-position, 2-row configuration. Minor variations exist in contact length and insulation height; mechanical fit verification is recommended for space-constrained designs.

Q: What are the key differences between these substitute parts?

A: The primary differences are operating temperature range (HTST-125-01-S-D: -55°C to 125°C; N2550-6002-RB: -55°C to 105°C), current rating per contact (3.4A versus 1.75A), and insulation material composition. All other electrical and mechanical specifications are equivalent.

Q: Are both parts RoHS compliant?

A: Yes, both HTST-125-01-S-D and N2550-6002-RB are ROHS3 compliant and carry UL94 V-0 flammability certification.

Q: What is the significance of the keying slot feature?

A: The keying slot provides mechanical polarization, preventing incorrect mating orientation. Both parts include this feature.