KT11P4SA3M34LFS Equivalent & Substitute Parts

Part Overview

The KT11P4SA3M34LFS 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 32VAC/DC. This surface mount, right-angle actuated switch features sealed construction with IP57 ingress protection, making it suitable for applications requiring dust and water resistance. The part is currently listed as obsolete, necessitating identification of equivalent alternatives for ongoing design support and procurement.

Substiute Parts

KT11P4SA3M34LFS

C&KIn Stock: 1164KT11P4SA3M34LFS Datasheet

Current PartRFQ

KT11B2SA3M34LFS

C&KIn Stock: 1139KT11B2SA3M34LFS Datasheet

SimilarRFQ

KT11P4SA2M34LFS

C&KIn Stock: 1662KT11P4SA2M34LFS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KT11P4SA3M34LFS is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (Momentary)
• Contact rating: 1VA @ 32VAC/DC
• Mounting type: Surface Mount, Right Angle
• Actuator orientation: Side Actuated
• Termination style: Gull Wing
• Operating force: 300gf
• Ingress protection: IP57 - Dust Protected, Waterproof
• Operating temperature range: -40°C ~ 90°C
• Mechanical life: 100,000 Cycles
• Moisture sensitivity level: MSL 1

Allowable Variations:

• Outline dimensions (within mechanical compatibility constraints)
• Actuator material composition (polyamide/nylon or rubber)
• Product status (active alternatives preferred for obsolete parts)
• RoHS and REACH compliance certifications
• Packaging format (bulk or tape & reel)

Two substitute parts meet these criteria and are identified below.

Parameter Comparison

Engineering Selection Recommendations

KT11B2SA3M34LFS is an active-status substitute with identical electrical and mechanical specifications to the KT11P4SA3M34LFS. The primary difference is actuator material composition (rubber versus polyamide/nylon). This part carries RoHS compliance certification, making it suitable for applications subject to RoHS regulatory requirements. Outline dimensions remain identical at 7.77mm x 4.61mm, ensuring direct PCB footprint compatibility.

KT11P4SA2M34LFS is an active-status substitute from the same base product family (KT11P4). It maintains identical electrical specifications and actuator material composition (polyamide/nylon). The outline dimension differs at 7.77mm x 6.41mm, representing a 1.8mm increase in one axis. This part is available in Tape & Reel packaging format and carries ROHS3 compliance certification. PCB layout verification is required to confirm mechanical clearance compatibility due to the dimensional variation.

Both substitutes maintain the sealed construction, IP57 ingress protection rating, 300gf operating force, 100,000-cycle mechanical life, and -40°C to 90°C operating temperature range of the original part.

Frequently Asked Questions (FAQ)

Q: Can KT11B2SA3M34LFS be used as a direct replacement for KT11P4SA3M34LFS?

A: Yes. Both parts share identical electrical specifications (SPST-NO, 1VA @ 32VAC/DC), mechanical characteristics (300gf operating force, 100,000-cycle life), environmental ratings (IP57, -40°C to 90°C), and physical footprint (7.77mm x 4.61mm). The actuator material differs (rubber versus polyamide/nylon), but both materials meet the specified performance requirements. KT11B2SA3M34LFS is currently in active production status.

Q: What is the key difference between KT11P4SA2M34LFS and the original part?

A: KT11P4SA2M34LFS differs in outline dimensions (7.77mm x 6.41mm versus 7.77mm x 4.61mm). All electrical and functional parameters remain identical. The dimensional increase of 1.8mm in one axis requires verification of available PCB space and mechanical clearance before implementation.

Q: Why does KT11B2SA3M34LFS use rubber actuator material instead of polyamide?

A: Both actuator materials are qualified for this switch design and meet the specified 300gf operating force and 100,000-cycle mechanical life requirements. Material selection does not affect electrical performance or environmental ratings. The rubber actuator variant is available as an active-production alternative.

Q: Are both substitute parts RoHS compliant?

A: KT11B2SA3M34LFS carries RoHS Compliant certification. KT11P4SA2M34LFS carries ROHS3 Compliant certification. The original KT11P4SA3M34LFS is listed as "Not applicable" for RoHS status due to its obsolete classification. Both substitutes meet current RoHS regulatory requirements.

Q: What packaging options are available for these substitutes?

A: KT11B2SA3M34LFS is available in bulk packaging. KT11P4SA2M34LFS is available in Tape & Reel (TR) format. Packaging selection depends on procurement volume and assembly process requirements.

Q: Do all three parts maintain the same ingress protection rating?

A: Yes. The original part and both substitutes maintain IP57 ingress protection (dust protected, waterproof) with sealed construction. Environmental performance is equivalent across all three parts.