PTS645SL43 Equivalent & Substitute Parts

Part Overview

The PTS645SL43 is a tactile switch manufactured by C&K, featuring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration with 0.05A @ 12VDC contact rating. This through-hole mounted switch is designed for applications requiring momentary actuation with a standard polyamide actuator and 130gf operating force. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Substiute Parts

PTS645SL43

C&KIn Stock: 1220PTS645SL43 Datasheet

Current PartRFQ

PTS645SL43-2 LFS

C&KIn Stock: 13289PTS645SL43-2 LFS Datasheet

DirectRFQ

TL1105F160Q

E-SwitchIn Stock: 1850TL1105F160Q Datasheet

DirectRFQ

HP0215AFKP2

NKK SwitchesIn Stock: 1719HP0215AFKP2 Datasheet

SimilarRFQ

TL1105F100Q

E-SwitchIn Stock: 11598TL1105F100Q Datasheet

SimilarRFQ

TL59NF160Q

E-SwitchIn Stock: 5866TL59NF160Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645SL43 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (momentary)
• Contact rating: 0.05A @ 12VDC
• Mounting type: Through Hole
• Actuator height: 4.30mm
• Outline dimensions: 6.00mm x 6.00mm (±0.20mm tolerance acceptable)
• Termination style: PC Pin
• Mechanical life: 100,000 Cycles minimum

Secondary Compatibility Criteria:

• Operating force: 100gf to 160gf range
• Operating temperature: Minimum -20°C to 70°C
• Actuator material: Polyamide or equivalent polymers
• RoHS3 compliance preferred for active parts

Parts are classified as follows:

Direct Substitutes: Parts meeting all primary compatibility criteria with identical or superior electrical specifications and active product status.

Similar Substitutes: Parts meeting primary mechanical and electrical criteria with minor variations in operating force, temperature range, or outline dimensions within acceptable engineering tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: PTS645SL43-2 LFS

The PTS645SL43-2 LFS is the direct successor from C&K with identical electrical and mechanical specifications to the obsolete PTS645SL43. This part maintains the same 0.05A @ 12VDC contact rating, 4.30mm actuator height, and 6.00mm x 6.00mm outline. The extended operating temperature range (-40°C ~ 85°C) provides superior thermal performance compared to the original part. Active product status ensures long-term availability. ROHS3 compliance meets current regulatory requirements.

Secondary Recommendations: TL1105F160Q and TL1105F100Q

Both E-Switch TL1105 series parts meet all primary compatibility criteria with identical electrical specifications and mechanical dimensions. The TL1105F160Q features 160gf operating force, while the TL1105F100Q provides 100gf force. Both maintain the 4.30mm actuator height and 6.00mm x 6.00mm outline. Operating temperature range of -20°C ~ 70°C covers standard industrial applications. Active product status and ROHS3 compliance support production continuity.

Alternative Consideration: TL59NF160Q

The TL59NF160Q from E-Switch meets electrical specifications with identical contact rating and actuator height. The outline dimension of 6.20mm x 6.20mm represents a 0.20mm increase in both axes, requiring PCB layout verification for footprint compatibility. This part is suitable only when outline tolerance is acceptable.

Limited Compatibility: HP0215AFKP2

The HP0215AFKP2 from NKK Switches features significantly higher contact rating (3VA @ 28VDC) and extended mechanical life (500,000 cycles). The 6.20mm x 6.20mm outline requires footprint verification. This part is suitable only for applications where higher electrical capacity and enhanced durability are required and outline tolerance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can PTS645SL43-2 LFS be used as a direct replacement for PTS645SL43?

A: Yes. Both parts share identical circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), actuator height (4.30mm), and outline dimensions (6.00mm x 6.00mm). The PTS645SL43-2 LFS is the active production equivalent with extended temperature range and current RoHS3 compliance.

Q: What is the difference between TL1105F160Q and TL1105F100Q?

A: Both parts are electrically and mechanically identical except for operating force. The TL1105F160Q requires 160gf actuation force, while the TL1105F100Q requires 100gf. The original PTS645SL43 specifies 130gf, placing it between these two options. Selection depends on application tactile feedback requirements.

Q: Does outline dimension variation affect PCB compatibility?

A: The PTS645SL43 specifies 6.00mm x 6.00mm outline. The TL59NF160Q and HP0215AFKP2 feature 6.20mm x 6.20mm outline, representing a 0.20mm increase in both axes. PCB footprint and component spacing must be verified before substitution to ensure mechanical clearance and assembly compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (PTS645SL43-2 LFS, TL1105F160Q, TL1105F100Q, TL59NF160Q, and HP0215AFKP2) carry ROHS3 compliance certification. The original PTS645SL43 carries RoHS Compliant status. Current regulatory requirements favor ROHS3 compliant parts for new designs.

Q: What packaging options are available?

A: PTS645SL43-2 LFS is supplied in Bulk packaging. TL1105F160Q and TL1105F100Q are supplied in Bulk packaging. TL59NF160Q is supplied in Cut Tape (CT) packaging. HP0215AFKP2 is supplied in Box packaging. Packaging selection affects procurement, handling, and assembly processes.

Q: Can HP0215AFKP2 be used in low-voltage applications rated for 0.05A @ 12VDC?

A: Yes. The HP0215AFKP2 is rated for 3VA @ 28VDC, which exceeds the 0.05A @ 12VDC requirement. Higher contact rating provides margin for reliability in the specified application. However, the 6.20mm x 6.20mm outline requires PCB footprint verification.

Q: What is the mechanical life difference between PTS645SL43 and HP0215AFKP2?

A: The PTS645SL43 specifies 100,000 mechanical cycles. The HP0215AFKP2 specifies 500,000 mechanical cycles, providing five times greater durability. This difference is relevant only for high-cycle applications where extended component life is required.