PTS645VL31 Equivalent & Substitute Parts

Part Overview

The PTS645VL31 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, right-angle mounted switch features side actuation and is designed for applications requiring momentary contact switching. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing production support and design continuity.

Substiute Parts

PTS645VL31

C&KIn Stock: 1034PTS645VL31 Datasheet

Current PartRFQ

PTS645VL31-2 LFS

C&KIn Stock: 37875PTS645VL31-2 LFS Datasheet

DirectRFQ

TL1105WF160Q

E-SwitchIn Stock: 17789TL1105WF160Q Datasheet

DirectRFQ

TL1105WF100Q

E-SwitchIn Stock: 13287TL1105WF100Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645VL31 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration: SPST-NO
• Contact rating: 0.05A @ 12VDC
• Switch function: Off-Mom (momentary)
• Mounting type: Through Hole, Right Angle
• Actuator orientation: Side Actuated
• Termination style: PC Pin
• Mechanical life: 100,000 Cycles minimum

Secondary Compatibility Parameters:

• Actuator length: 3.15mm (allows for minor dimensional variations in outline)
• Operating force: Range tolerance within application requirements
• Operating temperature: Must encompass or exceed the original specification range
• RoHS and REACH compliance status

The PTS645VL31-2 LFS qualifies as a direct substitute within the same C&K PTS645 series. The E-Switch TL1105 series parts (TL1105WF160Q and TL1105WF100Q) are classified as compatible alternatives based on matching electrical specifications and mechanical compatibility, though with variations in operating force and temperature range.

Parameter Comparison

Engineering Selection Recommendations

PTS645VL31-2 LFS (Direct Substitute)

The PTS645VL31-2 LFS is the primary recommended substitute. As a member of the same C&K PTS645 series, it maintains identical electrical and mechanical specifications to the original part. The key advantage is its active product status, ensuring ongoing availability and supply chain continuity. The extended operating temperature range (-40°C ~ 85°C) provides broader environmental compatibility compared to the original specification (-10°C ~ 60°C). Both parts carry equivalent compliance certifications: RoHS compliance, MSL 1 rating, and REACH Unaffected status. The transition from RoHS to ROHS3 compliance reflects current regulatory standards.

TL1105WF160Q (Compatible Alternative)

The TL1105WF160Q from E-Switch qualifies as a compatible alternative for applications where the operating force specification can accommodate 160gf (compared to the original 130gf). All critical electrical parameters match: SPST-NO circuit, 0.05A @ 12VDC contact rating, and momentary switch function. The through-hole, right-angle mounting with side actuation and 3.15mm actuator length ensure mechanical compatibility. Outline dimensions vary slightly (7.10mm x 6.55mm versus 7.00mm x 7.00mm), requiring PCB layout verification. The operating temperature range (-20°C ~ 70°C) is narrower than the PTS645VL31-2 LFS but suitable for standard industrial applications. ROHS3 compliance and MSL 1 rating are maintained.

TL1105WF100Q (Compatible Alternative)

The TL1105WF100Q is suitable for applications where lower operating force (100gf) is acceptable or preferred. This part shares identical electrical specifications and mounting characteristics with the TL1105WF160Q. The reduced actuator force may improve tactile response in low-force applications. The same dimensional and compliance considerations apply as noted for the TL1105WF160Q.

Frequently Asked Questions (FAQ)

Q: Can the PTS645VL31-2 LFS be used as a direct replacement for the PTS645VL31?

A: Yes. The PTS645VL31-2 LFS maintains identical electrical ratings (0.05A @ 12VDC, SPST-NO), mechanical configuration (through-hole, right-angle, side-actuated), and actuator specifications (3.15mm length, 130gf operating force). The primary difference is product status (active versus obsolete) and an extended operating temperature range. No design modifications are required.

Q: What are the key differences between the C&K PTS645VL31-2 LFS and the E-Switch TL1105 series?

A: Both maintain identical electrical specifications and mounting types. The primary differences are: (1) Outline dimensions vary slightly (7.00mm x 7.00mm for C&K versus 7.10mm x 6.55mm for E-Switch), requiring PCB layout verification; (2) Operating force differs (130gf for PTS645VL31-2 LFS, 160gf for TL1105WF160Q, 100gf for TL1105WF100Q); (3) Operating temperature ranges differ (C&K: -40°C ~ 85°C, E-Switch: -20°C ~ 70°C); (4) Manufacturer and series designation differ.

Q: Are there any compliance or certification differences between these parts?

A: All substitute parts carry equivalent compliance status: ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity level, and REACH Unaffected designation. The original PTS645VL31 carries RoHS Compliant status, while all active substitutes carry ROHS3 Compliant status, reflecting current regulatory requirements.

Q: Which substitute should be selected for applications with strict temperature requirements?

A: The PTS645VL31-2 LFS provides the widest operating temperature range (-40°C ~ 85°C), making it the optimal choice for applications requiring extended temperature performance. The E-Switch TL1105 series is limited to -20°C ~ 70°C.

Q: Do the outline dimension differences between C&K and E-Switch parts affect PCB compatibility?

A: PCB layout verification is required when substituting C&K parts (7.00mm x 7.00mm) with E-Switch TL1105 series parts (7.10mm x 6.55mm). While the difference is minor, existing PCB footprints must be evaluated to ensure adequate clearance and mounting hole alignment. Through-hole and PC pin termination remain consistent across all parts.

Q: Can the TL1105WF100Q and TL1105WF160Q be used interchangeably?

A: Both parts share identical electrical specifications, mounting configuration, and compliance certifications. The primary difference is operating force: 100gf versus 160gf. Selection depends on application requirements for actuator force. They are mechanically and electrically interchangeable but may produce different tactile feedback characteristics.