PTS125SM85 Equivalent & Substitute Parts

Part Overview

The PTS125SM85 is a tactile switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.05A at 12VDC. This through-hole mounted switch features top actuation with an 8.50mm actuator height and is designed for applications requiring momentary switching functionality. The PTS125SM85 is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and component procurement.

Substiute Parts

PTS125SM85

C&KIn Stock: 833PTS125SM85 Datasheet

Current PartRFQ

PTS125SM85-2 LFS

C&KIn Stock: 11776PTS125SM85-2 LFS Datasheet

DirectRFQ

FSM101

TE Connectivity ALCOSWITCH SwitchesIn Stock: 142585FSM101 Datasheet

SimilarRFQ

TL1100EF160Q

E-SwitchIn Stock: 27739TL1100EF160Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PTS125SM85 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are: circuit configuration (SPST-NO), contact rating voltage and current, mounting type (through hole), actuator orientation (top actuated), and physical outline dimensions (12.00mm x 12.00mm). Parts meeting these core criteria are classified as direct or similar substitutes depending on secondary parameter alignment, including actuator height, operating force, temperature range, and mechanical life rating.

Direct Substitute: PTS125SM85-2 LFS maintains identical electrical specifications and physical footprint, with only minor variations in operating force (180gf vs. 160gf) and product status (active vs. obsolete).

Similar Substitutes: FSM101 and TL1100EF160Q share the same circuit configuration, mounting type, and physical outline but differ in contact rating voltage (24VDC for FSM101), actuator height, operating force, temperature range, and mechanical life, requiring design verification for voltage and thermal compatibility.

Parameter Comparison

Engineering Selection Recommendations

PTS125SM85-2 LFS is the primary recommended substitute for the obsolete PTS125SM85. Both parts are manufactured by C&K, share identical electrical specifications (0.05A @ 12VDC), physical footprint (12.00mm x 12.00mm), and actuator height (8.50mm). The PTS125SM85-2 LFS is currently in active production status with ROHS3 compliance and maintains the same mechanical life rating (200,000 cycles). The minor increase in operating force (180gf vs. 160gf) does not affect functional compatibility for standard tactile switch applications.

FSM101 (TE Connectivity ALCOSWITCH Switches) is suitable as a substitute only for applications operating at 24VDC. While it maintains the same circuit configuration, mounting type, and physical outline, the elevated contact rating voltage and reduced mechanical life (100,000 cycles vs. 200,000 cycles) require design verification. The actuator height is reduced to 7.50mm, which may impact PCB layout considerations.

TL1100EF160Q (E-Switch) is suitable as a substitute for 12VDC applications requiring extended temperature operation (-20°C ~ 70°C). This part maintains identical contact rating and operating force specifications but features reduced mechanical life (100,000 cycles) and actuator height (7.50mm). The presence of tactile feedback is an additional feature not specified in the original part.

Frequently Asked Questions (FAQ)

Q: Can PTS125SM85-2 LFS be used as a direct replacement for PTS125SM85?

A: Yes. Both parts share identical electrical specifications (0.05A @ 12VDC), circuit configuration (SPST-NO), physical footprint (12.00mm x 12.00mm), and actuator height (8.50mm). The operating force difference (180gf vs. 160gf) is within acceptable tolerance for standard tactile switch applications. PTS125SM85-2 LFS is the recommended substitute due to active production status and ROHS3 compliance.

Q: What are the key differences between PTS125SM85 and FSM101?

A: FSM101 operates at 24VDC contact rating compared to 12VDC for PTS125SM85. Additionally, FSM101 has reduced mechanical life (100,000 cycles vs. 200,000 cycles) and lower actuator height (7.50mm vs. 8.50mm). FSM101 is suitable only for 24VDC circuit designs and requires design verification for thermal and mechanical performance.

Q: Is TL1100EF160Q compatible with the original PTS125SM85 application?

A: TL1100EF160Q maintains the same 12VDC contact rating and 160gf operating force as PTS125SM85, ensuring electrical compatibility. However, the reduced mechanical life (100,000 cycles vs. 200,000 cycles) and lower actuator height (7.50mm vs. 8.50mm) require evaluation against application duty cycle and PCB layout constraints. TL1100EF160Q is suitable for applications with lower cycle requirements and extended temperature operation.

Q: What packaging options are available for substitute parts?

A: PTS125SM85-2 LFS is supplied in bag packaging. FSM101 and TL1100EF160Q are supplied in bulk packaging. Packaging selection should align with procurement and assembly requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. PTS125SM85-2 LFS, FSM101, and TL1100EF160Q all meet ROHS3 compliance standards. The original PTS125SM85 is RoHS compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.