PTS645VL39 Equivalent & Substitute Parts

Part Overview

The PTS645VL39 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 component features side actuation, through-hole right-angle mounting, and is designed for applications requiring momentary switching functionality. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing production support and design continuity.

Substiute Parts

PTS645VL39

C&KIn Stock: 925PTS645VL39 Datasheet

Current PartRFQ

PTS645VL39-2 LFS

C&KIn Stock: 13012PTS645VL39-2 LFS Datasheet

DirectRFQ

TL1105VF160Q

E-SwitchIn Stock: 19691TL1105VF160Q Datasheet

DirectRFQ

TL1105VF100Q

E-SwitchIn Stock: 30746TL1105VF100Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645VL39 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

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

Compatible Variation Parameters:

• Actuator length: 3.85mm (exact match required for PCB layout compatibility)
• Outline dimensions: Tolerance within manufacturing standards
• Operating force: Variation acceptable within application requirements
• Operating temperature range: Extended ranges acceptable if minimum specification met
• RoHS/REACH compliance: Active product status preferred for long-term availability

The substitute parts identified below meet all mandatory parameters while maintaining functional and mechanical compatibility with the original PTS645VL39 specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PTS645VL39-2 LFS

The PTS645VL39-2 LFS is the direct successor within the C&K PTS645 series. This part maintains identical electrical and mechanical specifications to the original PTS645VL39, including circuit configuration, contact rating, actuator geometry, and operating force. The primary advantage is active product status with extended operating temperature range (-40°C ~ 85°C versus -10°C ~ 60°C), providing improved thermal margin for industrial applications. ROHS3 compliance ensures regulatory alignment with current environmental standards. Inventory availability (12,991 pieces) supports production continuity.

Secondary Recommendation: TL1105VF160Q (E-Switch)

The TL1105VF160Q from E-Switch provides cross-manufacturer compatibility with identical electrical specifications and actuator length. This part is suitable for applications where operating force tolerance of 160gf (versus 130gf) is acceptable. Operating temperature range (-20°C ~ 70°C) covers standard commercial and industrial environments. Outline dimensions vary slightly (7.10mm x 6.55mm), requiring PCB layout verification. High inventory availability (19,629 pieces) ensures supply security.

Tertiary Recommendation: TL1105VF100Q (E-Switch)

The TL1105VF100Q offers the lowest operating force (100gf) among available substitutes, suitable for applications requiring reduced actuation effort. Electrical specifications and actuator length remain compatible. This part is appropriate only when lower operating force is a design requirement rather than a constraint. Outline dimensions match TL1105VF160Q specifications. Highest inventory availability (30,711 pieces) provides maximum supply flexibility.

Frequently Asked Questions (FAQ)

Q: Can PTS645VL39-2 LFS be used as a direct replacement for PTS645VL39?

A: Yes. The PTS645VL39-2 LFS maintains identical electrical and mechanical specifications including circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), actuator length (3.85mm), outline dimensions (7.00mm x 7.00mm), and operating force (130gf). The extended operating temperature range (-40°C ~ 85°C) provides additional thermal margin. No PCB layout modifications are required.

Q: What are the key differences between C&K PTS645 and E-Switch TL1105 series substitutes?

A: Both series maintain identical electrical specifications and actuator length. Primary differences are outline dimensions (PTS645: 7.00mm x 7.00mm; TL1105: 7.10mm x 6.55mm) and operating force options. TL1105VF160Q operates at 160gf, while TL1105VF100Q operates at 100gf, compared to PTS645VL39's 130gf. PCB footprint verification is required before substitution.

Q: Are all substitute parts RoHS compliant?

A: Yes. PTS645VL39-2 LFS carries ROHS3 certification. Both E-Switch TL1105 variants (TL1105VF160Q and TL1105VF100Q) are ROHS3 compliant. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the impact of operating force variation on circuit performance?

A: Operating force affects actuation effort but does not alter electrical circuit behavior. PTS645VL39 operates at 130gf. TL1105VF160Q (160gf) requires increased finger pressure; TL1105VF100Q (100gf) requires reduced pressure. Selection depends on application ergonomics and mechanical design constraints, not electrical function.

Q: Can outline dimension differences affect PCB compatibility?

A: Yes. PTS645VL39 and PTS645VL39-2 LFS share identical 7.00mm x 7.00mm dimensions. E-Switch TL1105 variants measure 7.10mm x 6.55mm. PCB footprint and mounting hole spacing must be verified before substitution. Minor dimensional variations may require layout adjustment.

Q: What is the significance of extended temperature range in PTS645VL39-2 LFS?

A: PTS645VL39-2 LFS operates from -40°C to 85°C, compared to the original PTS645VL39 range of -10°C to 60°C. This extended range provides thermal margin for industrial, automotive, and outdoor applications. If the original design operates within -10°C to 60°C, the extended range offers no functional advantage but eliminates thermal margin concerns.

Q: Are all substitute parts available in bulk packaging?

A: Yes. PTS645VL39-2 LFS, TL1105VF160Q, and TL1105VF100Q are all supplied in bulk packaging, suitable for production assembly and reel-based pick-and-place operations.