PTS645SL50 Tactile Switch SPST-NO Equivalent & Substitute Parts

Part Overview

The PTS645SL50 is a tactile switch manufactured by C&K, configured as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 0.05A at 12VDC. This component features top actuation, through-hole mounting, and a 6.00mm x 6.00mm outline with 5.00mm actuator height. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and production requirements.

Substiute Parts

PTS645SL50

C&KIn Stock: 997PTS645SL50 Datasheet

Current PartRFQ

PTS645SL50-2 LFS

C&KIn Stock: 32013PTS645SL50-2 LFS Datasheet

DirectRFQ

TL1105AF160Q

E-SwitchIn Stock: 20688TL1105AF160Q Datasheet

DirectRFQ

TL1105AF100Q

E-SwitchIn Stock: 1971TL1105AF100Q Datasheet

SimilarRFQ

TL59AF160Q

E-SwitchIn Stock: 8212TL59AF160Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645SL50 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Contact rating: 0.05A @ 12VDC
• Mounting type: Through Hole
• Actuator orientation: Top Actuated
• Termination style: PC Pin
• Mechanical life: 100,000 Cycles
• Moisture sensitivity level: 1 (Unlimited)

Allowable Variation Parameters:

• Actuator height: ±0.20mm tolerance acceptable for PCB layout compatibility
• Outline dimensions: ±0.20mm tolerance acceptable
• Operating force: ±30gf variance acceptable within application requirements
• Operating temperature range: Extended ranges acceptable if minimum specification met
• Product status: Active products acceptable as replacements for obsolete parts
• Packaging format: Bulk or Cut Tape acceptable based on procurement requirements

Substitute parts must maintain electrical equivalence (circuit type, contact rating, voltage) and mechanical compatibility (mounting footprint, actuator interface) with the original PTS645SL50.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PTS645SL50-2 LFS

The PTS645SL50-2 LFS is the direct successor from C&K, maintaining identical electrical and mechanical specifications while offering active product status. This part provides the highest compatibility with existing designs and procurement processes. The extended operating temperature range (-40°C ~ 85°C) exceeds the original specification, providing enhanced thermal margin. ROHS3 compliance supersedes the original RoHS compliance status.

Secondary Substitutes: TL1105AF160Q and TL1105AF100Q (E-Switch)

Both E-Switch TL1105 series parts maintain full electrical equivalence and mechanical compatibility. The TL1105AF160Q matches the original 130gf operating force specification within acceptable tolerance (160gf). The TL1105AF100Q provides a lower actuation force (100gf) suitable for applications requiring reduced operating force. Both parts feature extended operating temperature ranges and active product status with ROHS3 compliance.

Tertiary Substitute: TL59AF160Q (E-Switch)

The TL59AF160Q provides electrical equivalence with a minor outline dimension variance (6.20mm x 6.20mm versus 6.00mm x 6.00mm). This 0.20mm increase falls within acceptable PCB layout tolerance for most applications. The part is available in Cut Tape packaging and maintains all other critical specifications. Verify PCB footprint clearance before implementation.

Selection Criteria:

• For direct replacement with maximum compatibility: PTS645SL50-2 LFS
• For alternative sourcing with identical specifications: TL1105AF160Q
• For applications requiring lower actuation force: TL1105AF100Q
• For cost-optimized procurement with minor footprint variance: TL59AF160Q

All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the PTS645SL50-2 LFS be used as a direct replacement for the obsolete PTS645SL50?

A: Yes. The PTS645SL50-2 LFS maintains identical electrical ratings (0.05A @ 12VDC), mechanical configuration (5.00mm height, 6.00mm x 6.00mm outline), and operating force (130gf). The extended operating temperature range and ROHS3 compliance provide enhanced specifications. No design modifications are required.

Q: What is the difference between the TL1105AF160Q and TL1105AF100Q?

A: Both parts are electrically and mechanically equivalent to the PTS645SL50. The primary difference is operating force: TL1105AF160Q requires 160gf actuation force, while TL1105AF100Q requires 100gf. Select based on application tactile feedback requirements. The original PTS645SL50 specifies 130gf, placing the TL1105AF160Q within acceptable tolerance.

Q: Is the TL59AF160Q compatible with existing PCB layouts designed for the PTS645SL50?

A: The TL59AF160Q outline is 6.20mm x 6.20mm compared to the original 6.00mm x 6.00mm specification. This 0.20mm increase in each dimension falls within standard PCB layout tolerance. Verify that the PCB footprint provides adequate clearance before implementation. All other mechanical and electrical parameters are equivalent.

Q: What packaging options are available for these substitute parts?

A: PTS645SL50-2 LFS, TL1105AF160Q, and TL1105AF100Q are available in Bulk packaging. TL59AF160Q is available in Cut Tape (CT) packaging. Select packaging based on procurement volume and assembly process requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, which supersedes the original RoHS compliance status of the PTS645SL50. All parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Can these parts be used in applications with extended temperature requirements?

A: The original PTS645SL50 operates from -10°C to 60°C. All substitute parts extend this range: PTS645SL50-2 LFS (-40°C ~ 85°C), TL1105 series (-20°C ~ 70°C), and TL59AF160Q (-20°C ~ 70°C). Select based on specific application temperature requirements. The PTS645SL50-2 LFS provides the widest operating range.