PTS645SH43-2 LFS Equivalent & Substitute Parts

Part Overview

The PTS645SH43-2 LFS is an active SPST-NO tactile switch manufactured by C&K, designed for through-hole mounting applications requiring 0.05A at 12VDC contact rating. This component is stocked in bulk packaging with 867 pieces available. Alternative equivalent parts are necessary to address supply chain flexibility, lead time optimization, and inventory management across multiple manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

PTS645SH43-2 LFS

C&KIn Stock: 935PTS645SH43-2 LFS Datasheet

Current PartRFQ

MJTP1230

APEM Inc.In Stock: 42662MJTP1230 Datasheet

SimilarRFQ

MJTP1230A

APEM Inc.In Stock: 9666MJTP1230A Datasheet

SimilarRFQ

TL59NF160Q

E-SwitchIn Stock: 5866TL59NF160Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645SH43-2 LFS is determined by strict alignment of the following critical parameters:

• Electrical Compatibility: Circuit configuration (SPST-NO), contact rating (0.05A @ 12VDC), and switch function (Off-Mom) must be identical
• Mechanical Compatibility: Mounting type (Through Hole), actuator orientation (Top Actuated), and termination style (PC Pin) must match
• Physical Footprint: Outline dimensions and actuator height determine PCB layout compatibility
• Environmental Compliance: RoHS3 compliance and MSL rating must be maintained
• Operational Durability: Mechanical life rating of 100,000 cycles is required

The three substitute parts listed—MJTP1230, MJTP1230A, and TL59NF160Q—meet all mandatory electrical and mechanical criteria. Variations in operating force, actuator material, and temperature range are secondary parameters that do not prevent substitution when primary criteria are satisfied.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain active product status and full ROHS3 compliance with MSL 1 rating, ensuring regulatory and environmental compatibility with the PTS645SH43-2 LFS.

MJTP1230 (APEM Inc.) provides direct mechanical and electrical equivalence with identical outline dimensions (6.00mm x 6.00mm) and actuator height (4.30mm). Operating temperature range is reduced to -20°C ~ 70°C compared to the primary part's -40°C ~ 85°C specification.

MJTP1230A (APEM Inc.) maintains all electrical specifications and outline dimensions but features an increased actuator height of 5.00mm, resulting in a 0.70mm vertical offset from the primary part. This dimension difference requires PCB layout verification before selection.

TL59NF160Q (E-Switch) offers electrical equivalence with a slightly larger outline footprint (6.20mm x 6.20mm) and identical actuator height (4.30mm). Packaging is supplied in Cut Tape format rather than bulk, affecting procurement and handling procedures.

Selection should prioritize inventory availability, packaging requirements, and thermal operating range constraints specific to the application environment.

Frequently Asked Questions (FAQ)

Q: Can MJTP1230 be used as a direct replacement for PTS645SH43-2 LFS?

A: MJTP1230 meets all mandatory electrical and mechanical criteria: SPST-NO circuit, 0.05A @ 12VDC contact rating, through-hole mounting, top actuated orientation, and identical 6.00mm x 6.00mm outline with 4.30mm actuator height. The reduced operating temperature range (-20°C ~ 70°C versus -40°C ~ 85°C) must be evaluated against application requirements.

Q: What is the key difference between MJTP1230 and MJTP1230A?

A: Both parts are electrically identical SPST-NO switches with 0.05A @ 12VDC rating and 6.00mm x 6.00mm outline. The primary distinction is actuator height: MJTP1230 measures 4.30mm while MJTP1230A measures 5.00mm. This 0.70mm difference affects PCB clearance and enclosure fit.

Q: Why does TL59NF160Q have different outline dimensions?

A: TL59NF160Q maintains electrical equivalence (SPST-NO, 0.05A @ 12VDC) and identical actuator height (4.30mm) but features a 6.20mm x 6.20mm outline compared to the 6.00mm x 6.00mm standard. PCB footprint design must accommodate this 0.20mm dimensional increase in both X and Y axes.

Q: Are all substitute parts RoHS3 compliant?

A: All three substitute parts—MJTP1230, MJTP1230A, and TL59NF160Q—are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the primary part's environmental and regulatory status.

Q: What packaging differences exist among these parts?

A: PTS645SH43-2 LFS, MJTP1230, and MJTP1230A are supplied in bulk packaging. TL59NF160Q is supplied in Cut Tape (CT) format, affecting handling, storage, and automated assembly compatibility.

Q: Do all substitute parts have the same mechanical life rating?

A: All four parts—the primary PTS645SH43-2 LFS and the three substitutes MJTP1230, MJTP1230A, and TL59NF160Q—are rated for 100,000 mechanical cycles, ensuring equivalent durability performance.