BP02YT DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The BP02YT is a slide-actuated DIP switch manufactured by C&K, configured as a single-pole single-throw (SPST) switch with 2 positions. It is rated for 100mA at 5VDC and features through-hole, right-angle mounting with PC pin termination. The BP02YT is classified as obsolete, making identification of functionally equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

BP02YT

C&KIn Stock: 1064BP02YT Datasheet

Current PartRFQ

BPA02B

C&KIn Stock: 4307BPA02B Datasheet

DirectRFQ

195-2MST

CTS ElectrocomponentsIn Stock: 92269195-2MST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BP02YT are identified based on the following core electrical and mechanical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Circuit configuration: SPST with 2 positions
• Mounting type: Through hole, right angle
• Termination style: PC pin
• Pitch: 0.100" (2.54mm), Full
• Washable design: Yes

Allowable Parameter Variations:

• Actuator type: Slide or piano actuators are both acceptable for SPST DIP switch applications
• Current rating: Must meet or exceed the application requirement (100mA minimum)
• Voltage rating: Must meet or exceed the application requirement (5VDC minimum)
• Operating temperature range: May extend beyond the original specification
• Contact material and finish: May differ while maintaining electrical performance
• Body material: May differ while maintaining mechanical integrity

Identified Substitutes:

1. BPA02B (C&K) – Direct manufacturer alternative with piano actuator, higher voltage and temperature rating
2. 195-2MST (CTS Electrocomponents) – Cross-manufacturer alternative with piano actuator and extended temperature range

Parameter Comparison

Engineering Selection Recommendations

BPA02B (C&K) is the primary substitute for the BP02YT. Both parts are manufactured by C&K and share identical electrical ratings (100mA, 5VDC). The BPA02B features a piano actuator instead of a slide actuator and is classified as active product status with ROHS3 compliance. The operating temperature range extends to 85°C, providing improved thermal margin. Physical dimensions are comparable, with the BPA02B measuring 0.287" in height versus the BP02YT at 0.315". This part is recommended for applications where C&K product continuity and identical electrical specifications are required.

195-2MST (CTS Electrocomponents) is a cross-manufacturer alternative suitable for applications where the current requirement does not exceed 50mA. This part operates at 24VDC and extends the operating temperature range to -40°C ~ 85°C. The 195-2MST provides enhanced electrical life (2,000 cycles) and ROHS3 compliance. This substitute is appropriate for designs that can accommodate the reduced current rating and higher voltage specification.

Both substitutes maintain the same mounting configuration (through hole, right angle), termination style (PC pin), and pitch (0.100"), ensuring mechanical compatibility with existing PCB layouts designed for the BP02YT.

Frequently Asked Questions (FAQ)

Q: Can the BPA02B directly replace the BP02YT in existing designs?

A: Yes. The BPA02B maintains identical electrical specifications (100mA, 5VDC, SPST, 2 positions) and mechanical compatibility (through hole, right angle, PC pin, 0.100" pitch). The primary difference is the actuator type (piano versus slide) and extended operating temperature range. Physical height differs by 0.028", which is typically accommodated within standard PCB clearance tolerances.

Q: Is the 195-2MST suitable for all BP02YT applications?

A: The 195-2MST is suitable only for applications where the circuit current does not exceed 50mA. The BP02YT is rated for 100mA; therefore, the 195-2MST cannot be used in designs requiring the full 100mA current capacity. Additionally, the 195-2MST operates at 24VDC, requiring verification that the application circuit supports this voltage level.

Q: What is the difference between slide and piano actuators?

A: Slide actuators (BP02YT) feature a linear sliding motion perpendicular to the switch body. Piano actuators (BPA02B, 195-2MST) feature a rocker-style motion. Both actuator types are functionally equivalent for SPST DIP switch applications; the selection depends on user interface preference and available PCB space.

Q: Are all three parts RoHS compliant?

A: The BP02YT is RoHS Compliant. The BPA02B and 195-2MST are both ROHS3 Compliant, representing a more recent revision of the RoHS directive. All three parts are REACH Unaffected and classified under ECCN EAR99.

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

A: The BP02YT uses phosphor bronze contacts with tin finish. The BPA02B uses beryllium copper contacts with gold finish. Both material combinations are suitable for low-voltage, low-current switching applications. The gold finish on the BPA02B provides enhanced corrosion resistance and contact reliability, representing an improvement over the tin finish.

Q: Can packaging differences affect substitution decisions?

A: The BP02YT is supplied in standard packaging (not specified). The BPA02B and 195-2MST are supplied in tube packaging. Tube packaging is standard for DIP switches and does not affect electrical or mechanical compatibility. Procurement and handling procedures may differ based on packaging format.