MJTP1144 Equivalent & Substitute Parts

Part Overview

The MJTP1144 is an active SPST-NO tactile switch manufactured by APEM Inc., designed for through-hole mounting applications requiring low-current switching at 12VDC. This component is specified for momentary operation with tactile feedback and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across different manufacturer offerings.

Substiute Parts

MJTP1144

APEM Inc.In Stock: 866MJTP1144 Datasheet

Current PartRFQ

PTS645TL50-2 LFS

C&KIn Stock: 4519PTS645TL50-2 LFS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MJTP1144 is determined by the following critical parameters:

• Electrical Compatibility: Circuit configuration (SPST-NO) and contact rating (0.05A @ 12VDC) must be identical
• Mechanical Interface: Through-hole mounting with PC pin termination and top-actuated orientation required
• Functional Equivalence: Momentary switch function (Off-Mom) must be maintained
• Regulatory Compliance: ROHS3 compliance and MSL Level 1 rating required
• Operational Durability: Minimum 100,000 mechanical life cycles

The PTS645TL50-2 LFS from C&K meets all critical substitution criteria, maintaining identical electrical specifications, mounting configuration, and regulatory compliance while offering extended operating temperature range and alternative actuator material composition.

Parameter Comparison

Engineering Selection Recommendations

Both the MJTP1144 and PTS645TL50-2 LFS are active products with ROHS3 compliance and REACH unaffected status, qualifying them for equivalent use in applications meeting the specified electrical and mechanical requirements. Selection between these parts should be based on:

• Actuator Height Tolerance: The MJTP1144 provides 4.30mm height; the PTS645TL50-2 LFS provides 5.00mm height. PCB clearance and enclosure design constraints determine suitability.
• Operating Force Differential: The MJTP1144 specifies 160gf actuation force; the PTS645TL50-2 LFS specifies 130gf. User interface feel and tactile response requirements drive this selection.
• Temperature Operating Range: The PTS645TL50-2 LFS extends to -40°C and +85°C versus the MJTP1144 range of -20°C to +70°C. Extended temperature applications require the C&K part.
• Footprint Dimensions: Outline differences (6.10mm vs 6.00mm) are negligible for most PCB layouts but should be verified against design constraints.

Frequently Asked Questions (FAQ)

Q: Can the PTS645TL50-2 LFS directly replace the MJTP1144 in existing designs?

A: Direct replacement is possible when actuator height and operating force differences do not conflict with mechanical design constraints. The 0.70mm height increase and 30gf lower actuation force must be evaluated against specific application requirements.

Q: Are there electrical compatibility concerns between these parts?

A: No. Both parts maintain identical SPST-NO circuit configuration and 0.05A @ 12VDC contact rating, ensuring electrical interchangeability in the specified application.

Q: What is the significance of the grounding pin feature on the PTS645TL50-2 LFS?

A: The grounding pin is a mechanical feature of the C&K design. Its presence does not affect electrical substitution eligibility but may require PCB layout consideration if the design does not accommodate this feature.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the MJTP1144 and PTS645TL50-2 LFS are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating, meeting identical regulatory compliance standards.

Q: Which part should be selected for high-temperature applications?

A: The PTS645TL50-2 LFS is specified for -40°C to +85°C operation, extending 15°C above the MJTP1144 maximum. Applications requiring operation above 70°C require the C&K part.

Q: Are there packaging or inventory considerations?

A: Both parts are supplied in bulk packaging. Inventory availability should be confirmed with the respective manufacturers or authorized distributors for project timelines.