BP03YT DIP Switch SPST Equivalent & Substitute Parts

Part Overview

The BP03YT is a slide-actuated DIP switch manufactured by C&K, configured as a single-pole single-throw (SPST) switch with 3 positions. This component is rated for 100mA at 5VDC and features through-hole, right-angle mounting with PC pin termination. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and component procurement.

Substiute Parts

BP03YT

C&KIn Stock: 910BP03YT Datasheet

Current PartRFQ

195-3MST

CTS ElectrocomponentsIn Stock: 913195-3MST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 195-3MST from CTS Electrocomponents is identified as a substitute for the BP03YT based on the following matching parameters:

• Circuit configuration: Both are SPST switches
• Number of positions: Both feature 3-position configuration
• Mounting type: Both use through-hole, right-angle mounting
• Pitch: Both maintain 0.100" (2.54mm) full pitch
• Termination style: Both use PC pin termination
• Washable design: Both feature epoxy sealed terminals with tape seal
• Moisture sensitivity: Both rated MSL 1 (Unlimited)
• Compliance: Both are RoHS compliant and REACH unaffected

Substitution is valid where the application voltage and current requirements do not exceed the substitute part's ratings.

Parameter Comparison

Engineering Selection Recommendations

The 195-3MST is suitable as a substitute for the BP03YT in applications where:

• Circuit voltage does not exceed 5VDC (the lower rating of the two parts)
• Circuit current does not exceed 50mA (the lower rating of the two parts)
• Operating temperature range of -20°C to 60°C is maintained
• Actuator mechanism change from slide to piano type is acceptable for the application
• Minimal height and length variations (approximately 0.004" and 0.020" respectively) do not impact PCB layout

The 195-3MST offers advantages including active product status, extended electrical life (2,000 cycles versus 1,000), and wider operating temperature range. Both parts maintain identical pitch, mounting type, and termination style, ensuring mechanical compatibility on standard DIP switch footprints.

Frequently Asked Questions (FAQ)

Q: Can the 195-3MST directly replace the BP03YT in a 5V, 100mA application?

A: No. The 195-3MST is rated for 50mA maximum, which is below the 100mA requirement. Use only in applications requiring 50mA or less at 5VDC.

Q: What is the primary difference between these two switches?

A: The actuator mechanism differs: BP03YT uses a slide actuator, while 195-3MST uses a piano actuator. Both are 3-position SPST switches with identical pitch and mounting, but user interface and actuation force characteristics differ.

Q: Are the physical dimensions compatible?

A: Yes. Both switches use 0.100" (2.54mm) pitch and through-hole, right-angle mounting. Height and length variations are minimal (less than 0.025"), and both fit standard DIP switch footprints.

Q: Why is the BP03YT obsolete?

A: The BP03YT is listed as obsolete by C&K. The 195-3MST from CTS Electrocomponents is an active product and represents a current-generation alternative.

Q: Do both parts meet RoHS requirements?

A: Yes. The BP03YT is RoHS Compliant, and the 195-3MST is ROHS3 Compliant. Both are REACH unaffected.

Q: What is the packaging difference?

A: The BP03YT packaging is listed as standard (-), while the 195-3MST is supplied in Tube packaging.