PTS635SL50 LFS Equivalent & Substitute Parts

Part Overview

The PTS635SL50 LFS 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 a rectangular button actuator with 5.00mm height and is designed for off-momentary operation. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Substiute Parts

PTS635SL50 LFS

C&KIn Stock: 902PTS635SL50 LFS Datasheet

Current PartRFQ

EVQ-PE505K

Panasonic Electronic ComponentsIn Stock: 1130EVQ-PE505K Datasheet

SimilarRFQ

FSMH

TE Connectivity ALCOSWITCH SwitchesIn Stock: 78148FSMH Datasheet

SimilarRFQ

MJTP1250

APEM Inc.In Stock: 5977MJTP1250 Datasheet

SimilarRFQ

TL1107BF130WQ

E-SwitchIn Stock: 34799TL1107BF130WQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS635SL50 LFS is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Contact Rating: Must support 0.05A at minimum voltage of 12VDC
• Mounting Type: Must be Through Hole
• Actuator Height: Must be 5.00mm
• Outline Dimensions: Must be 6.00mm x 4.60mm
• Actuator Orientation: Must be Top Actuated
• Termination Style: Must be PC Pin
• RoHS Compliance: Must be ROHS3 Compliant

The following parts meet these substitution criteria:

• EVQ-PE505K (Panasonic Electronic Components) - Active product status
• FSMH (TE Connectivity ALCOSWITCH Switches) - Active product status, higher voltage rating
• MJTP1250 (APEM Inc.) - Active product status
• TL1107BF130WQ (E-Switch) - Active product status

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are ROHS3 compliant and carry active product status, ensuring long-term availability and regulatory compliance. Selection among these alternatives should be based on specific application requirements:

EVQ-PE505K provides extended operating temperature range (-30°C to 85°C) and increased mechanical life (50,000 cycles) compared to the original part, with matching 12VDC contact rating.

FSMH offers the highest mechanical life rating (100,000 cycles) and extended temperature range (-35°C to 85°C). This part is rated for 24VDC operation, providing additional voltage margin for applications operating at 12VDC.

MJTP1250 delivers 50,000 cycle mechanical life with operating temperature range of -20°C to 70°C. This part includes tactile feedback features and is suitable for applications requiring enhanced user feedback.

TL1107BF130WQ matches the original operating force specification (130gf) and provides 50,000 cycle mechanical life with tactile feedback features. Operating temperature range is -20°C to 70°C.

Frequently Asked Questions (FAQ)

Q: Can I use FSMH as a direct replacement for PTS635SL50 LFS in a 12VDC circuit?

A: Yes. FSMH is rated for 0.05A @ 24VDC, which exceeds the 12VDC requirement of the original part. All mechanical and dimensional specifications match the PTS635SL50 LFS.

Q: What is the difference in operating force between the substitute parts?

A: Operating force varies: PTS635SL50 LFS and FSMH and TL1107BF130WQ require 130gf, EVQ-PE505K requires 160gf, and MJTP1250 requires 180gf. Higher operating force may affect user perception of switch actuation.

Q: Which substitute part has the longest mechanical life?

A: FSMH offers 100,000 cycles, compared to 50,000 cycles for EVQ-PE505K, MJTP1250, and TL1107BF130WQ, and 20,000 cycles for the original PTS635SL50 LFS.

Q: Are all substitute parts available in the same packaging as the original?

A: All substitute parts are supplied in Bulk packaging, consistent with the original part specification.

Q: Do the substitute parts maintain the same PCB footprint?

A: Yes. All substitute parts share identical outline dimensions (6.00mm x 4.60mm), actuator height (5.00mm), and through-hole PC pin termination, ensuring direct PCB compatibility.

Q: What is the temperature operating range difference between the original and substitutes?

A: The original PTS635SL50 LFS operates from -40°C to 60°C. Substitute parts offer extended ranges: EVQ-PE505K (-30°C to 85°C), FSMH (-35°C to 85°C), MJTP1250 (-20°C to 70°C), and TL1107BF130WQ (-20°C to 70°C).