PTS645TL70 LFS Equivalent & Substitute Parts

Part Overview

The PTS645TL70 LFS 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 component features top actuation with a 7.00mm actuator height and is designed for applications requiring momentary switching functionality. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Substiute Parts

PTS645TL70 LFS

C&KIn Stock: 964PTS645TL70 LFS Datasheet

Current PartRFQ

1-1825955-0

TE Connectivity ALCOSWITCH SwitchesIn Stock: 11601-1825955-0 Datasheet

SimilarRFQ

MJTP1144

APEM Inc.In Stock: 866MJTP1144 Datasheet

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MJTP1144A

APEM Inc.In Stock: 1137MJTP1144A Datasheet

SimilarRFQ

MJTP1232G

APEM Inc.In Stock: 850MJTP1232G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PTS645TL70 LFS is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration (SPST-NO)
• Contact rating voltage (12VDC nominal operation)
• Contact rating current (0.05A)
• Mounting type (Through Hole)
• Actuator orientation (Top Actuated)
• Termination style (PC Pin)
• Outline dimensions (6.00mm x 6.00mm or compatible)
• Mechanical life rating (100,000 Cycles minimum)

Secondary Consideration Parameters:

• Actuator height (7.00mm preferred for PCB clearance compatibility)
• Operating force (130gf baseline)
• Operating temperature range (must encompass application requirements)
• RoHS and regulatory compliance status

The substitute parts listed below meet the primary compatibility criteria. Variations in actuator height, operating force, and temperature range are noted in the parameter comparison table to enable informed selection based on specific application constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

1-1825955-0 and MJTP1232G are the preferred substitutes for the PTS645TL70 LFS. Both maintain identical outline dimensions (6.00mm x 6.00mm) and actuator height (7.00mm), ensuring direct PCB footprint compatibility. Both parts are active products with current manufacturing support, ROHS3 compliance, and REACH unaffected status. The 1-1825955-0 operates at 24VDC, providing enhanced voltage margin in applications where 12VDC operation is specified. MJTP1232G maintains 12VDC operation identical to the original part.

Secondary Substitutes (Conditional Compatibility):

MJTP1144 and MJTP1144A are functionally equivalent but feature reduced actuator heights (4.30mm and 5.00mm respectively) compared to the original 7.00mm specification. These parts are suitable only for applications where reduced actuator height does not conflict with mechanical clearance requirements or user interface design constraints. Both are active APEM products with full compliance certifications.

Compliance and Regulatory Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence to the obsolete original part. All parts carry MSL 1 (Unlimited) moisture sensitivity ratings, indicating no special handling requirements during storage or assembly.

Temperature Range Considerations:

The original PTS645TL70 LFS operates across -40°C to 85°C. The 1-1825955-0 covers -35°C to 85°C, suitable for most industrial applications. APEM substitutes (MJTP series) operate across -20°C to 70°C, which may be limiting for applications requiring extended low-temperature operation below -20°C or sustained operation above 70°C.

Frequently Asked Questions (FAQ)

Q: Can the MJTP1144 or MJTP1144A be used as direct replacements for the PTS645TL70 LFS?

A: These parts are functionally equivalent in circuit configuration, contact rating, and electrical performance. However, their reduced actuator heights (4.30mm and 5.00mm versus 7.00mm) may affect PCB layout compatibility and user interface ergonomics. Verify mechanical clearance and actuator accessibility in your specific application before substitution.

Q: What is the key difference between the 1-1825955-0 and the MJTP1232G?

A: Both parts match the original outline and actuator height specifications. The primary difference is manufacturer: 1-1825955-0 is manufactured by TE Connectivity ALCOSWITCH and operates at 24VDC, while MJTP1232G is manufactured by APEM and operates at 12VDC. The 1-1825955-0 provides higher voltage rating and broader temperature range (-35°C to 85°C versus -20°C to 70°C).

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original PTS645TL70 LFS.

Q: Does operating force variation affect substitutability?

A: The original part specifies 130gf operating force, while all substitutes specify 160gf. This 30gf increase represents approximately 23% higher actuation force. For applications sensitive to tactile feedback or requiring minimal actuation force, this difference should be evaluated against user interface requirements and mechanical design constraints.

Q: What is the impact of different switch travel specifications?

A: The original part does not specify switch travel. Substitute parts specify 0.10mm (1-1825955-0) or 0.25mm (APEM MJTP series). Shorter travel distances may provide faster response characteristics, while longer travel distances may offer improved tactile feedback. Verify compatibility with your application's mechanical and user interface design.

Q: Can I use these substitutes in applications operating below -20°C?

A: The APEM MJTP series substitutes (MJTP1144, MJTP1144A, MJTP1232G) are rated only to -20°C minimum. For applications requiring operation below -20°C, use the 1-1825955-0 (rated to -35°C) or verify that the APEM parts meet your specific low-temperature requirements through additional testing or manufacturer consultation.

Q: Are packaging differences significant for these substitutes?

A: All substitute parts are supplied in bulk packaging, matching the original part's through-hole configuration. No special handling or packaging considerations apply beyond standard MSL 1 (Unlimited) moisture sensitivity requirements.