PTS645SH70 Equivalent & Substitute Parts

Part Overview

The PTS645SH70 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 a standard actuator with 7.00mm height and 6.00mm x 6.00mm outline dimensions. The product is currently obsolete, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity.

Substiute Parts

PTS645SH70

C&KIn Stock: 1250PTS645SH70 Datasheet

Current PartRFQ

PTS645SH70-2 LFS

C&KIn Stock: 51858PTS645SH70-2 LFS Datasheet

DirectRFQ

TL1105EF250Q7.3RED

E-SwitchIn Stock: 25340TL1105EF250Q7.3RED Datasheet

DirectRFQ

TL1105FF160Q

E-SwitchIn Stock: 17711TL1105FF160Q Datasheet

SimilarRFQ

TL1240BQ1JCLR

E-SwitchIn Stock: 1017TL1240BQ1JCLR Datasheet

SimilarRFQ

TL1240BQ2JBLK

E-SwitchIn Stock: 1116TL1240BQ2JBLK Datasheet

SimilarRFQ

TL59FF260Q

E-SwitchIn Stock: 10910TL59FF260Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645SH70 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO
• Contact rating: 0.05A @ 12VDC
• Mounting type: Through Hole
• Actuator orientation: Top Actuated
• Termination style: PC Pin
• Outline dimensions: 6.00mm x 6.00mm (with tolerance for minor variations)
• Mechanical life: 100,000 Cycles minimum

Secondary Compatibility Factors:

• Actuator height: 7.00mm (±0.20mm acceptable for PCB clearance)
• Operating force: 160gf to 260gf (functional range for tactile feedback)
• Operating temperature: Minimum -20°C to 70°C (covers original -10°C to 60°C range)
• RoHS3 compliance preferred for regulatory alignment

Substitute parts are grouped into two categories:

Direct Equivalent: PTS645SH70-2 LFS maintains identical electrical specifications, mechanical dimensions, and actuator characteristics while offering active product status and extended temperature range.

Compatible Alternatives: E-Switch TL1105 and TL59 series parts meet all primary electrical and mechanical criteria with minor parameter variations in operating force and actuator height that remain within functional tolerance for standard through-hole tactile switch applications.

Parameter Comparison

Engineering Selection Recommendations

First Priority: PTS645SH70-2 LFS

This C&K part is the direct equivalent replacement. It maintains identical electrical specifications (0.05A @ 12VDC, SPST-NO), mechanical dimensions (6.00mm x 6.00mm, 7.00mm height), and operating force (200gf). The primary advantage is active product status with ROHS3 compliance and extended operating temperature range (-40°C to 85°C). Inventory availability is substantial (51,790 pcs), supporting production continuity. This part requires no design modification and provides the highest compatibility assurance.

Secondary Priority: E-Switch TL1105FF160Q

This part meets all primary electrical and mechanical criteria with identical contact rating, circuit configuration, and through-hole mounting. The actuator height (7.00mm) and outline (6.00mm x 6.00mm) match the original specification. Operating force is reduced to 160gf, which remains within functional tactile switch parameters. Operating temperature range (-20°C to 70°C) covers the original specification. Active product status and ROHS3 compliance support long-term availability. Inventory (17,664 pcs) is adequate for production requirements.

Tertiary Priority: E-Switch TL1105EF250Q7.3RED

This part maintains electrical compatibility (0.05A @ 12VDC, SPST-NO) and mechanical mounting (through-hole, 6.00mm x 6.00mm outline). Operating force is increased to 250gf, and actuator height is 7.30mm, representing minor deviations from the original 200gf and 7.00mm specification. These variations remain within acceptable tolerance for standard tactile switch applications. Active product status and ROHS3 compliance are confirmed. Inventory (25,287 pcs) supports production needs.

Alternative Consideration: E-Switch TL59FF260Q

This part provides electrical equivalence (0.05A @ 12VDC, SPST-NO) and compatible through-hole mounting. Outline dimensions (6.20mm x 6.20mm) represent a minor increase from the original 6.00mm specification, requiring PCB layout verification. Operating force (260gf) and actuator height (7.00mm) are within functional tolerance. Active product status and ROHS3 compliance are confirmed. Packaging is Cut Tape (CT) format with adequate inventory (10,823 pcs).

Not Recommended: TL1240 Series (TL1240BQ1JCLR, TL1240BQ2JBLK)

These illuminated tactile switches introduce functional differences (LED illumination at 4.2VDC, square button actuator type, 8.20mm height) that exceed acceptable substitution parameters for a non-illuminated standard actuator application. While electrical contact rating is compatible, the additional illumination circuitry and mechanical differences make these parts unsuitable for direct replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can PTS645SH70-2 LFS be used as a direct replacement for PTS645SH70?

A: Yes. PTS645SH70-2 LFS is the direct equivalent with identical electrical specifications (0.05A @ 12VDC, SPST-NO), mechanical dimensions (6.00mm x 6.00mm, 7.00mm actuator height), and operating force (200gf). The part is currently active with ROHS3 compliance and extended temperature range (-40°C to 85°C). No design modification is required.

Q: What is the difference between operating force values in substitute parts?

A: Operating force (measured in grams-force, gf) determines the tactile feedback and actuation pressure required. The original PTS645SH70 specifies 200gf. Substitute parts range from 160gf to 260gf. These variations remain within functional tolerance for standard tactile switch applications, though higher force values require slightly greater finger pressure for actuation. Selection depends on specific user interface requirements.

Q: Are all substitute parts compatible with the original PCB layout?

A: Most substitute parts are compatible with minor considerations. PTS645SH70-2 LFS, TL1105FF160Q, and TL59FF260Q maintain 7.00mm actuator height matching the original specification. TL1105EF250Q7.3RED has 7.30mm height, requiring verification of PCB clearance. TL59FF260Q has 6.20mm x 6.20mm outline versus the original 6.00mm x 6.00mm, necessitating PCB layout review. All parts use identical PC Pin termination style and through-hole mounting.

Q: What is the significance of RoHS3 compliance on substitute parts?

A: ROHS3 compliance indicates adherence to current European Union Restriction of Hazardous Substances regulations. All substitute parts carry ROHS3 certification, ensuring regulatory alignment with modern manufacturing and environmental standards. The original PTS645SH70 carries RoHS Compliant status. Upgrading to ROHS3-certified substitutes supports long-term supply chain compliance and product lifecycle management.

Q: Why are TL1240 illuminated switches not recommended as substitutes?

A: TL1240 series parts are illuminated tactile switches with integrated LED functionality (4.2VDC, blue LED), square button actuators, and 8.20mm height. These features represent functional additions beyond the original non-illuminated, standard actuator design. Substitution would require circuit design modifications to support LED illumination and control logic. These parts are suitable only for applications requiring illuminated tactile feedback.

Q: What packaging formats are available for substitute parts?

A: PTS645SH70-2 LFS is supplied in Bulk packaging. E-Switch TL1105 series parts are available in Bulk format. TL59FF260Q is supplied in Cut Tape (CT) format. Packaging selection depends on production volume and assembly process requirements. Bulk packaging is standard for high-volume production; Cut Tape format supports lower-volume or prototype applications.

Q: Can substitute parts with different operating temperature ranges be used in the original application?

A: The original PTS645SH70 operates from -10°C to 60°C. All substitute parts specify -20°C to 70°C operating range, which encompasses the original specification with extended margins. This compatibility ensures reliable operation across the original temperature envelope and provides additional thermal margin for demanding environments. No temperature-related limitations apply to substitution.