SET BU AU OA Equivalent & Substitute Parts

Part Overview

The SET BU AU OA is a pushbutton switch manufactured by C&K, part of the DIGITAST series. This is a Single Pole Double Throw (SPDT) keyswitch designed for through-hole mounting with a rated current of 10mA DC at 24V. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

SET BU AU OA

C&KIn Stock: 1148SET BU AU OA Datasheet

Current PartRFQ

SER BU AU OA

C&KIn Stock: 1047SER BU AU OA Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SET BU AU OA is based on strict electrical and mechanical parameter matching within the DIGITAST series. The substitute part SER BU AU OA maintains identical specifications across all critical parameters: SPDT circuit configuration, 10mA DC current rating, 24V DC voltage rating, momentary switch function, through-hole mounting, keyswitch type with square button actuator, PC pin termination, and identical operating temperature range and electrical life rating. Both parts are ROHS3 compliant with MSL 1 rating. The primary distinction is product status: SET BU AU OA is obsolete while SER BU AU OA is active, making SER BU AU OA the direct functional equivalent for new procurement and system replacement scenarios.

Parameter Comparison

Engineering Selection Recommendations

The SER BU AU OA is the direct substitute for the obsolete SET BU AU OA. Both parts are manufactured by C&K within the DIGITAST series and share identical electrical and mechanical specifications. The SER BU AU OA maintains active product status with current manufacturing availability, making it the appropriate selection for replacement applications. Both parts carry ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The identical electrical life rating of 5,000,000 cycles and matching operating temperature range of -25°C to 85°C confirm functional equivalence for all specified operating conditions.

Frequently Asked Questions (FAQ)

Q: Can SER BU AU OA directly replace SET BU AU OA in existing designs? A: Yes. The SER BU AU OA is electrically and mechanically identical to SET BU AU OA across all specified parameters, including circuit configuration, current and voltage ratings, mounting type, and operating characteristics.

Q: What is the primary reason for substitution? A: SET BU AU OA is obsolete. SER BU AU OA is the active equivalent part from the same manufacturer and series with identical specifications.

Q: Are there any compliance differences between the two parts? A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels.

Q: Do the parts have the same physical footprint? A: Yes. Both parts use through-hole mounting with PC pin termination and identical actuator configuration (square button, blue color).

Q: What is the electrical life expectancy for both parts? A: Both parts are rated for 5,000,000 cycles of electrical operation.

Q: Are there inventory considerations for substitution? A: SET BU AU OA has 1,124 pieces in stock (obsolete status). SER BU AU OA has 1,002 pieces in stock (active status). For new procurement, SER BU AU OA should be specified.