BPA05K Equivalent & Substitute Parts

Part Overview

The BPA05K is a DIP switch manufactured by C&K, featuring a 5-position SPST configuration with piano actuator, rated for 100mA at 5VDC. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement planning. The BPA05K utilizes phosphor bronze contacts with tin finish and is designed for through-hole, right-angle mounting applications.

Substiute Parts

BPA05K

C&KIn Stock: 1195BPA05K Datasheet

Current PartRFQ

BPA05B

C&KIn Stock: 5700BPA05B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BPA05K is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPST)
• Number of positions (5)
• Current rating (100mA)
• Voltage rating (5VDC)
• Actuator type (Piano)
• Mounting type (Through Hole, Right Angle)
• Pitch (0.100" / 2.54mm)
• Height above board (0.287" / 7.30mm)
• Operating temperature range (-20°C ~ 85°C)
• Mechanical and electrical life (1,000 Cycles)

The BPA05B qualifies as a direct substitute based on full alignment with these parameters. Variations in contact material (phosphor bronze vs. beryllium copper), contact finish (tin vs. gold), and RoHS compliance status do not affect functional equivalence for the specified electrical and mechanical requirements.

Parameter Comparison

Engineering Selection Recommendations

The BPA05B is the direct functional equivalent for the obsolete BPA05K. Selection of the BPA05B is supported by:

• Active product status, ensuring continued availability and supply chain stability
• ROHS3 compliance, meeting current regulatory requirements for new designs and procurement
• Identical electrical and mechanical specifications across all critical parameters
• Beryllium copper contacts with gold finish provide enhanced contact reliability and corrosion resistance compared to the phosphor bronze/tin configuration of the BPA05K

For applications requiring component replacement or new procurement, the BPA05B is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the BPA05B directly replace the BPA05K in existing designs?

A: Yes. The BPA05B meets all functional requirements specified for the BPA05K, including circuit configuration, current and voltage ratings, actuator type, mounting dimensions, and operating temperature range. PCB layout and mechanical mounting are identical.

Q: What is the difference between the contact materials?

A: The BPA05K uses phosphor bronze with tin finish; the BPA05B uses beryllium copper with gold finish. Both configurations meet the 100mA, 5VDC electrical specification. The beryllium copper/gold combination in the BPA05B provides superior contact resistance stability and corrosion resistance.

Q: Does the RoHS compliance difference affect compatibility?

A: No. RoHS compliance is a regulatory and procurement consideration, not a functional parameter. Both parts are electrically and mechanically equivalent. The BPA05B's ROHS3 compliance is advantageous for new designs and procurement planning.

Q: Are the packaging formats interchangeable?

A: The BPA05K is supplied in standard packaging; the BPA05B is supplied in tube packaging. Both formats contain identical components. Tube packaging is standard for active production parts and does not affect component performance or PCB assembly compatibility.

Q: What is the inventory status for each part?

A: The BPA05K (obsolete) has 1,095 pieces in stock. The BPA05B (active) has 5,623 pieces in stock, providing greater availability for ongoing procurement needs.