KMC9BPD-4P(71) Equivalent & Substitute Parts

Part Overview

The KMC9BPD-4P(71) is a 4-position circular connector plug with male pins and solder cup termination manufactured by Hirose Electric Co Ltd. This connector is designed for free-hanging, in-line applications requiring bayonet lock fastening and water-resistant ingress protection. The part is currently obsolete, necessitating identification of equivalent substitute components for ongoing system support and new designs.

Substiute Parts

KMC9BPD-4P(71)

Hirose Electric Co LtdIn Stock: 779KMC9BPD-4P(71) Datasheet

Current PartRFQ

KMC9BPD-4P(31)

Hirose Electric Co LtdIn Stock: 996KMC9BPD-4P(31) Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KMC9BPD-4P(71) is based on strict equivalence of the following critical parameters:

• Connector Type & Gender: Plug with male pins
• Position Count: 4 positions
• Shell Size: Size 9 insert
• Termination Method: Solder cup
• Fastening Mechanism: Bayonet lock
• Electrical Ratings: 1A current, 100VAC/140VDC voltage
• Environmental Protection: Water resistant classification
• Operating Temperature Range: -25°C to 85°C
• Contact Material & Finish: Brass with gold mating surface (78.7µin/2.00µm thickness)

The substitute part KMC9BPD-4P(31) maintains all these critical parameters, ensuring functional and mechanical compatibility with applications originally designed for the KMC9BPD-4P(71).

Parameter Comparison

Engineering Selection Recommendations

The KMC9BPD-4P(31) is the direct substitute for the obsolete KMC9BPD-4P(71). Both connectors are manufactured by Hirose Electric Co Ltd and share identical electrical, mechanical, and environmental specifications. The KMC9BPD-4P(31) carries Last Time Buy status and is RoHS compliant, making it suitable for new designs and legacy system support. The substitute maintains the same base product number (KMC9BPD) and is available in bulk packaging with 915 units in current inventory.

Frequently Asked Questions (FAQ)

Q: Are KMC9BPD-4P(71) and KMC9BPD-4P(31) mechanically interchangeable?

A: Yes. Both connectors feature identical shell size (9), bayonet lock fastening, and free-hanging mounting configuration. They are direct mechanical equivalents.

Q: Do the electrical ratings differ between these parts?

A: No. Both parts are rated for 1A current and 100VAC/140VDC voltage with identical operating temperature ranges (-25°C to 85°C).

Q: What is the significance of the packaging difference?

A: The KMC9BPD-4P(71) is listed with unspecified packaging, while the KMC9BPD-4P(31) is supplied in bulk packaging. This affects order quantities and handling but does not impact connector performance or compatibility.

Q: Is the KMC9BPD-4P(31) suitable for new product designs?

A: Yes. The KMC9BPD-4P(31) is RoHS compliant and carries Last Time Buy status, making it appropriate for new designs requiring this connector type. However, designers should plan for long-term component availability given the Last Time Buy designation.

Q: Are there differences in insert material composition?

A: The KMC9BPD-4P(71) specifies polyacetal insert material, while the KMC9BPD-4P(31) specifies polyacetal with glass filling. Both materials are compatible with the connector's electrical and mechanical requirements.