KT11P4SA1M Equivalent & Substitute Parts

Part Overview

The KT11P4SA1M is a tactile switch with SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration, rated for 1VA at 50VAC/DC. This surface mount, right-angle actuated switch features sealed construction with IP57 ingress protection and operates across -40°C to 90°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing applications and new designs.

Substiute Parts

KT11P4SA1M

C&KIn Stock: 792KT11P4SA1M Datasheet

Current PartRFQ

KT11P4SA1M34LFS

C&KIn Stock: 2986KT11P4SA1M34LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KT11P4SA1M is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO
• Switch Function: Must be Off-Mom (Momentary)
• Mounting Type: Must be Surface Mount, Right Angle
• Actuator Orientation: Must be Side Actuated
• Termination Style: Must be Gull Wing
• Outline Dimensions: Must be 7.77mm x 4.38mm
• Ingress Protection: Must maintain IP57 rating
• Operating Temperature Range: Must support -40°C ~ 90°C
• Mechanical Life: Must meet or exceed 100,000 Cycles
• Actuator Material: Must be Polyamide (PA), Nylon

The substitute part KT11P4SA1M34LFS meets all mechanical and functional requirements. The voltage rating difference (32VAC/DC vs. 50VAC/DC) represents a design constraint that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The KT11P4SA1M34LFS is the direct substitute for the obsolete KT11P4SA1M. Both parts share identical mechanical form factors, circuit topology, and environmental ratings. The substitute part offers the following advantages:

• Active Product Status: KT11P4SA1M34LFS is currently in active production, ensuring long-term availability and supply chain continuity.
• RoHS3 Compliance: The substitute meets current regulatory requirements, whereas the original part is RoHS non-compliant.
• Packaging Efficiency: Available in Tape & Reel format for automated assembly processes.

The primary design consideration is the voltage rating reduction from 50VAC/DC to 32VAC/DC. This substitution is appropriate for applications operating at or below 32VAC/DC. Applications requiring the full 50VAC/DC rating must evaluate alternative sources or design modifications.

Frequently Asked Questions (FAQ)

Q: Can KT11P4SA1M34LFS be used as a direct replacement in all applications?

A: The substitute part is mechanically and functionally compatible with identical mounting, actuator orientation, and environmental specifications. However, the voltage rating is reduced from 50VAC/DC to 32VAC/DC. Substitution is valid only for applications operating within the 32VAC/DC limit.

Q: What is the difference in packaging between the main part and substitute?

A: The KT11P4SA1M is supplied in bulk packaging, while KT11P4SA1M34LFS is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated pick-and-place assembly and provides better component protection during handling and storage.

Q: Are there any compliance differences between these parts?

A: Yes. The KT11P4SA1M is RoHS non-compliant, while KT11P4SA1M34LFS is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part is the appropriate choice.

Q: What is the operating force specification for the substitute part?

A: The KT11P4SA1M34LFS has an operating force of 300gf (gram-force). The original part does not specify this parameter in available documentation.

Q: Are both parts sealed switches?

A: Yes. Both the KT11P4SA1M and KT11P4SA1M34LFS feature sealed construction with IP57 ingress protection, providing dust and waterproof performance.

Q: What is the mechanical life expectancy?

A: Both parts are rated for 100,000 mechanical cycles, providing equivalent durability for momentary switch applications.