KT11P2SM Equivalent & Substitute Parts

Part Overview

The KT11P2SM 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, gull wing termination, and sealed construction with IP57 ingress protection. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing production and maintenance applications.

Substiute Parts

KT11P2SM

C&KIn Stock: 1401KT11P2SM Datasheet

Current PartRFQ

KT11P2SM34LFS

C&KIn Stock: 7245KT11P2SM34LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KT11P2SM is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPST-NO
• Switch function: Off-Mom (Momentary)
• Mounting type: Surface Mount
• Actuator orientation: Top Actuated
• Termination style: Gull Wing
• Outline dimensions: 6.38mm x 6.22mm
• Actuator height: 5.36mm
• Ingress protection: IP57
• Operating temperature range: -40°C ~ 90°C
• Mechanical life: 100,000 Cycles
• Actuator material: Polyamide (PA), Nylon

Allowable Variation Parameters:

• Contact rating voltage: May be lower than 50V (downward compatible)
• Operating force: May differ if not specified in original
• Packaging format: May differ (bulk vs. tape & reel)
• RoHS compliance: May improve from non-compliant to compliant
• Product status: Active status preferred over obsolete

The substitute KT11P2SM34LFS meets all mandatory parameters while offering improved voltage rating flexibility and active product status.

Parameter Comparison

Engineering Selection Recommendations

KT11P2SM34LFS as Direct Substitute:

The KT11P2SM34LFS is a valid substitute for the obsolete KT11P2SM based on identical mechanical and functional specifications. The substitute maintains all critical parameters including circuit configuration, mounting geometry, actuator characteristics, and environmental ratings.

Voltage Rating Consideration:

The substitute operates at 1VA @ 32VAC/DC compared to the original 50VAC/DC rating. This represents a lower voltage specification and is suitable for applications operating at or below 32V. For circuits requiring the full 50V rating of the original part, voltage compatibility must be verified against actual circuit requirements.

Compliance Advantage:

The KT11P2SM34LFS achieves ROHS3 compliance, addressing regulatory requirements that the obsolete KT11P2SM does not meet. This is particularly relevant for new designs or production runs subject to RoHS directives.

Availability and Packaging:

The substitute offers significantly higher inventory availability (7220 units vs. 1356 units) and is supplied in standard Tape & Reel packaging, facilitating automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can KT11P2SM34LFS replace KT11P2SM in all applications?

A: The substitute is mechanically and functionally compatible with identical mounting geometry, actuator height, and circuit configuration. Compatibility depends on circuit voltage requirements. Applications operating at 32V or below are fully compatible. Applications requiring the full 50V rating must be evaluated against actual operating conditions.

Q: What is the primary difference between these parts?

A: The main difference is the contact voltage rating: KT11P2SM is rated 1VA @ 50VAC/DC, while KT11P2SM34LFS is rated 1VA @ 32VAC/DC. Both parts share identical mechanical specifications, environmental protection, and lifecycle ratings.

Q: Why is the original part listed as obsolete?

A: The KT11P2SM is marked obsolete by the manufacturer. The KT11P2SM34LFS represents the active product line continuation within the same KT series, offering improved compliance and availability.

Q: Are there packaging differences between these parts?

A: Yes. The KT11P2SM is supplied in bulk packaging, while the KT11P2SM34LFS is supplied in Tape & Reel (TR) format. Tape & Reel packaging is standard for high-volume surface mount assembly operations.

Q: Does the substitute meet current regulatory requirements?

A: The KT11P2SM34LFS is ROHS3 compliant, meeting current RoHS directives. The original KT11P2SM is RoHS non-compliant. For new designs or production runs subject to RoHS regulations, the substitute is the appropriate choice.

Q: What is the operating force specification?

A: The substitute specifies 300gf operating force. The original part does not provide an operating force specification in the available documentation.