PTS645TH43 Equivalent & Substitute Parts

Part Overview

The PTS645TH43 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 top actuation with a 6.00mm x 6.00mm outline and includes a grounding pin. The product is currently obsolete, making identification of equivalent substitute parts essential for ongoing design support, maintenance, and component sourcing in legacy systems.

Key Parameters

Parameter	Value
Manufacturer Part Number	PTS645TH43
Manufacturer	C&K
Circuit Configuration	SPST-NO
Contact Rating	0.05A @ 12VDC
Mounting Type	Through Hole
Actuator Height (Vertical)	4.30mm
Outline Dimensions	6.00mm x 6.00mm
Operating Force	200gf
Operating Temperature Range	-10°C ~ 60°C
Mechanical Life	100,000 Cycles
Product Status	Obsolete
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the PTS645TH43 is determined by strict equivalence across the following critical parameters:

Circuit Configuration: Must be SPST-NO to maintain identical electrical function
Contact Rating: Must support 0.05A @ 12VDC minimum
Mounting Type: Must be through-hole to ensure PCB compatibility
Actuator Height: Must be 4.30mm to fit within mechanical envelope constraints
Outline Dimensions: Must be 6.00mm x 6.00mm for footprint compatibility
Termination Style: Must use PC Pin termination for direct replacement
Grounding Pin Feature: Must be present for electrical integrity

The TLE1105F160Q from E-Switch meets all critical substitution criteria. While operating force (160gf vs. 200gf) and operating temperature range differ, these parameters fall within acceptable tolerance bands for equivalent functionality in the specified application context.

Parameter Comparison

Parameter	PTS645TH43 (C&K)	TLE1105F160Q (E-Switch)	Match Status
Circuit Configuration	SPST-NO	SPST-NO	Equivalent
Switch Function	Off-Mom	Off-Mom	Equivalent
Contact Rating @ Voltage	0.05A @ 12VDC	0.05A @ 12VDC	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Actuator Height (Vertical)	4.30mm	4.30mm	Equivalent
Actuator Orientation	Top Actuated	Top Actuated	Equivalent
Outline Dimensions	6.00mm x 6.00mm	6.00mm x 6.00mm	Equivalent
Termination Style	PC Pin	PC Pin	Equivalent
Illumination	Non-Illuminated	Non-Illuminated	Equivalent
Features	Grounding Pin	Grounding Pin	Equivalent
Operating Force	200gf	160gf	Variation
Operating Temperature Range	-10°C ~ 60°C	-20°C ~ 70°C	Extended Range
Mechanical Life	100,000 Cycles	100,000 Cycles	Equivalent
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent

Engineering Selection Recommendations

The TLE1105F160Q is a direct functional equivalent for the obsolete PTS645TH43. Both components share identical electrical specifications, mechanical footprints, and mounting characteristics. The TLE1105F160Q offers the additional advantage of active product status, ensuring continued availability and supply chain stability.

Compliance certifications are equivalent: both components are RoHS compliant and REACH unaffected. The TLE1105F160Q carries ROHS3 certification, representing current regulatory alignment. Both components carry ECCN EAR99 classification and identical HTSUS codes (8536.50.9031).

The operating force differential (160gf vs. 200gf) represents a 20% reduction in actuation force. The extended operating temperature range of the TLE1105F160Q (-20°C ~ 70°C versus -10°C ~ 60°C) provides broader environmental tolerance. These variations do not compromise substitution validity for standard tactile switch applications within the specified electrical parameters.

Frequently Asked Questions (FAQ)

Q: Can the TLE1105F160Q replace the PTS645TH43 in existing PCB designs?

A: Yes. Both components share identical through-hole footprints (6.00mm x 6.00mm), actuator height (4.30mm), and PC Pin termination. Direct PCB-level substitution is supported without layout modification.

Q: What is the significance of the operating force difference (200gf vs. 160gf)?

A: Operating force determines the tactile feedback and actuation pressure required. The 160gf specification of the TLE1105F160Q represents a lighter actuation force. This difference is within normal manufacturing tolerance bands for tactile switches and does not affect electrical function or contact rating performance.

Q: Are there compliance or regulatory differences between these components?

A: Both components are RoHS compliant and REACH unaffected. The TLE1105F160Q carries ROHS3 certification, representing current regulatory standards. No compliance barriers exist for substitution.

Q: Why is the PTS645TH43 listed as obsolete?

A: Obsolete status indicates the component is no longer manufactured by C&K. The TLE1105F160Q from E-Switch maintains active product status, ensuring ongoing availability and supply chain support.

Q: Does the extended temperature range of the TLE1105F160Q affect substitution suitability?

A: No. The extended operating temperature range (-20°C ~ 70°C) of the TLE1105F160Q encompasses the original specification range (-10°C ~ 60°C). This represents an enhancement rather than a limitation for substitution applications.

Q: Are packaging considerations relevant for component selection?

A: The PTS645TH43 is specified with "-" packaging notation, while the TLE1105F160Q is supplied in Bulk packaging. For through-hole components, packaging format does not affect electrical or mechanical compatibility. Packaging selection depends on procurement and assembly workflow requirements.

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