BPA09K DIP Switch SPST 9 Position Piano Actuator Equivalent & Substitute Parts

Part Overview

The BPA09K is a through-hole DIP switch manufactured by C&K, featuring a 9-position SPST configuration with piano actuator and 100mA/5VDC electrical rating. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The BPA09K remains available in inventory (965 pcs), but obsolete status indicates limited future availability and potential supply chain constraints.

Substiute Parts

BPA09K

C&KIn Stock: 1013BPA09K Datasheet

Current PartRFQ

BPA09B

C&KIn Stock: 1233BPA09B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BPA09K is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPST)
• Number of positions (9)
• Current and voltage ratings (100mA/5VDC minimum)
• Actuator type and mechanical profile (piano, raised level)
• Mounting configuration (through hole, right angle)
• Pitch and height specifications (0.100" pitch, 0.287" height)
• Termination style (PC pin)
• Operating temperature range (-20°C to 85°C)
• Mechanical and electrical life cycles (1,000 cycles)

The BPA09B qualifies as a direct substitute based on identical electrical specifications, mechanical dimensions, and functional performance characteristics. Differences in contact material (Beryllium Copper vs. Phosphor Bronze) and contact finish (Gold vs. Tin) do not affect functional compatibility within the specified electrical parameters. The BPA09B offers improved product status (Active vs. Obsolete) and enhanced compliance profile (RoHS3 Compliant vs. RoHS non-compliant).

Parameter Comparison

Engineering Selection Recommendations

The BPA09B is the qualified substitute for the BPA09K based on functional equivalence and superior product lifecycle status. Selection of BPA09B is supported by:

• Identical electrical performance within specified 100mA/5VDC parameters
• Mechanical compatibility with existing PCB layouts and mounting requirements
• Active product status ensuring continued availability and supply chain stability
• RoHS3 compliance, addressing regulatory requirements not met by the obsolete BPA09K
• Beryllium Copper contact material with gold finish provides enhanced contact reliability and corrosion resistance compared to phosphor bronze with tin finish

For applications requiring long-term production support or regulatory compliance, BPA09B is the appropriate selection. The BPA09K remains suitable for existing inventory applications where compliance requirements are not mandated and supply constraints are not a concern.

Frequently Asked Questions (FAQ)

Q: Can BPA09B be used as a direct replacement for BPA09K in existing designs?

A: Yes. The BPA09B meets all functional and mechanical requirements of the BPA09K. Electrical specifications, circuit configuration, physical dimensions, and mounting characteristics are identical. No PCB redesign or layout modification is required.

Q: What are the differences between BPA09K and BPA09B?

A: The primary differences are contact material (Phosphor Bronze vs. Beryllium Copper), contact finish (Tin vs. Gold), product status (Obsolete vs. Active), and RoHS compliance (non-compliant vs. RoHS3 compliant). These differences do not affect functional compatibility within the specified electrical parameters.

Q: Why is the BPA09K classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. This classification typically reflects market demand shifts or product line consolidation. The BPA09B represents the active equivalent within the BPA series.

Q: Does packaging differ between BPA09K and BPA09B?

A: Yes. BPA09K packaging is listed as standard, while BPA09B is supplied in tube packaging. Tube packaging is standard for active production components and does not affect component functionality or performance.

Q: Are there compliance or certification differences?

A: Yes. BPA09B is RoHS3 compliant, while BPA09K is RoHS non-compliant. Both components are REACH unaffected and classified under ECCN EAR99. For applications subject to RoHS requirements, BPA09B is the required selection.

Q: What is the impact of different contact materials on performance?

A: Beryllium Copper (BPA09B) provides superior contact reliability, lower contact resistance, and enhanced corrosion resistance compared to Phosphor Bronze (BPA09K). Gold finish further improves contact durability. These characteristics support extended operational life within the specified 1,000-cycle mechanical and electrical life ratings.