HR31-SC-121 Equivalent & Substitute Parts

Part Overview

The HR31-SC-121 is a socket contact connector from Hirose Electric Co Ltd, designed for 18-24 AWG wire gauges with crimp termination and gold contact finish. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain supply chain continuity and ensure long-term availability for new designs and production runs.

Substiute Parts

HR31-SC-121

Hirose Electric Co LtdIn Stock: 1067HR31-SC-121 Datasheet

Current PartRFQ

HR31-SC-121(71)

Hirose Electric Co LtdIn Stock: 987HR31-SC-121(71) Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HR31-SC-121 is determined by strict equivalence across the following critical parameters:

• Series designation (HR31)
• Contact type (Socket)
• Termination method (Crimp)
• Wire gauge range (18-24 AWG)
• Contact finish (Gold)
• Moisture sensitivity level (MSL 1)

The HR31-SC-121(71) qualifies as a direct substitute based on identical electrical and mechanical specifications. The primary distinction is product status and regulatory compliance, with the substitute part being active and RoHS3 compliant.

Parameter Comparison

Engineering Selection Recommendations

The HR31-SC-121(71) is the direct equivalent for the obsolete HR31-SC-121. Selection between these parts should be based on regulatory requirements and product lifecycle stage:

• For new designs and production requiring RoHS3 compliance, the HR31-SC-121(71) is the appropriate selection.
• For legacy systems or applications where RoHS compliance is not mandated, either part meets the electrical and mechanical specifications.
• The HR31-SC-121(71) is currently active with confirmed inventory availability, ensuring supply chain reliability.

Frequently Asked Questions (FAQ)

Q: Are HR31-SC-121 and HR31-SC-121(71) electrically and mechanically interchangeable?

A: Yes. Both parts share identical wire gauge (18-24 AWG), contact termination (crimp), contact finish (gold), and moisture sensitivity specifications. They are direct substitutes within the HR31 series.

Q: What is the significance of the "(71)" designation in HR31-SC-121(71)?

A: The "(71)" suffix indicates a packaging or manufacturing variant within the same base product number HR31-SC-121. The variant is RoHS3 compliant and supplied in bulk packaging.

Q: Why is the original HR31-SC-121 listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. The HR31-SC-121(71) represents the current active equivalent from the manufacturer.

Q: Can I use HR31-SC-121(71) in applications originally designed for HR31-SC-121?

A: Yes. The electrical and mechanical parameters are identical. The primary consideration is RoHS3 compliance, which may be required depending on application and regulatory jurisdiction.

Q: What packaging is available for the substitute part?

A: The HR31-SC-121(71) is supplied in bulk packaging, as specified by the manufacturer.