KT11P3JM Equivalent & Substitute Parts

Part Overview

The KT11P3JM is a tactile switch manufactured by C&K, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a contact rating of 1VA at 50V. This surface mount component features top actuation, sealed construction with IP57 ingress protection, and is designed for applications requiring reliable momentary switching in dust and moisture-prone environments. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications.

Substiute Parts

KT11P3JM

C&KIn Stock: 948KT11P3JM Datasheet

Current PartRFQ

KT11P3JM34LFS

C&KIn Stock: 1482KT11P3JM34LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KT11P3JM is determined by the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (momentary operation)
• Mounting type: Surface Mount
• Actuator orientation: Top Actuated
• Outline dimensions: 6.38mm x 6.22mm
• Actuator height: 4.12mm
• Termination style: J Lead
• Ingress protection: IP57
• Operating temperature range: -40°C ~ 90°C
• Mechanical life: 100,000 Cycles

Allowable Variation Parameters:

• Contact rating voltage: May be lower than 50V (50V is maximum requirement)
• Product status: Active status preferred for availability
• RoHS compliance: Upgrade to compliant versions acceptable
• Packaging format: Variation permitted (bulk to Tape & Reel conversion acceptable)

The KT11P3JM34LFS qualifies as a direct substitute based on matching all mandatory parameters while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The KT11P3JM34LFS is the qualified substitute for the obsolete KT11P3JM based on the following engineering criteria:

Functional Compatibility: All electrical and mechanical parameters match the original specification. The contact rating of 32V on the substitute is acceptable for applications originally designed for 50V operation, as the lower voltage rating represents a conservative design margin.

Product Status Advantage: The substitute part is listed as Active, ensuring continued availability and supply chain reliability compared to the obsolete status of the original part.

Compliance Enhancement: The KT11P3JM34LFS meets ROHS3 compliance requirements, addressing regulatory requirements that may apply to new production or maintenance applications. The original part's non-compliant status may restrict its use in certain jurisdictions or customer specifications.

Physical and Functional Equivalence: Identical outline dimensions, actuator height, termination style, and mounting configuration ensure direct PCB compatibility without layout modifications. The sealed IP57 construction and 100,000-cycle mechanical life are preserved.

Packaging Consideration: The substitute is supplied in Tape & Reel format, which is standard for production environments and offers advantages in automated assembly processes compared to bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can KT11P3JM34LFS be used as a direct replacement for KT11P3JM without PCB modifications?

A: Yes. Both parts share identical outline dimensions (6.38mm x 6.22mm), actuator height (4.12mm), J Lead termination, and mounting type. No PCB layout changes are required.

Q: Is the lower voltage rating (32V vs. 50V) a limitation for substitution?

A: No. The 32V contact rating on the substitute is acceptable for applications designed for 50V operation. The lower rating does not restrict functionality in circuits operating at or below 32V. For circuits requiring operation above 32V, the original specification must be maintained.

Q: What is the difference between bulk and Tape & Reel packaging?

A: Bulk packaging supplies loose components, while Tape & Reel (TR) format provides components on continuous tape suitable for automated pick-and-place assembly. Both formats contain the same component; packaging format selection depends on assembly process requirements.

Q: Why is RoHS3 compliance important for this substitution?

A: RoHS3 compliance indicates the component meets current European Union and equivalent regulatory requirements for restricted hazardous substances. This is relevant for new production, export to regulated markets, and customer specifications that mandate compliance.

Q: Are there any electrical performance differences between the main part and substitute?

A: The substitute provides an additional specification parameter (300gf operating force) not listed for the main part. All other electrical characteristics—circuit configuration, switch function, contact rating, ingress protection, and mechanical life—are identical or equivalent.

Q: What inventory status should be considered when selecting between these parts?

A: The main part (KT11P3JM) shows 921 pieces in stock but is obsolete, indicating limited future availability. The substitute (KT11P3JM34LFS) shows 1384 pieces in stock with Active status, providing superior long-term supply reliability.