KT11P2SA3M33 Equivalent & Substitute Parts

Part Overview

The KT11P2SA3M33 is a tactile switch manufactured by C&K, featuring SPST-NO (Single Pole Single Throw - Normally Open) circuit configuration with a contact rating of 1VA at 50V. This surface mount, right-angle actuated switch is designed for sealed, dust-protected, and waterproof applications with an operating temperature range of -40°C to 90°C.

The KT11P2SA3M33 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

KT11P2SA3M33

C&KIn Stock: 848KT11P2SA3M33 Datasheet

Current PartRFQ

KT11P2SA3M35LFG

C&KIn Stock: 2894KT11P2SA3M35LFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT11P2SA3M33 is determined by strict equivalence across the following critical parameters:

• Circuit configuration: SPST-NO
• Mounting type: Surface Mount, Right Angle
• Actuator orientation: Side Actuated
• Outline dimensions: 7.77mm x 4.61mm
• Operating force: 300gf
• Ingress protection: IP57
• Operating temperature range: -40°C ~ 90°C
• Mechanical life: 100,000 Cycles
• Termination style: Gull Wing
• Actuator material: Polyamide (PA), Nylon

The KT11P2SA3M35LFG qualifies as a direct substitute based on matching all mechanical and functional parameters. The primary difference is the contact rating voltage specification (32VAC/DC versus 50VAC/DC) and product status (Active versus Obsolete). The substitute part operates within a lower voltage envelope while maintaining identical mechanical and environmental specifications.

Parameter Comparison

Engineering Selection Recommendations

The KT11P2SA3M35LFG is the designated substitute for the obsolete KT11P2SA3M33. Selection of this substitute is supported by the following factors:

• Active product status ensures ongoing availability and supply chain continuity
• ROHS3 compliance of the substitute part aligns with current regulatory requirements, whereas the original part is RoHS non-compliant
• Identical mechanical, environmental, and functional specifications maintain design compatibility
• Lower voltage contact rating (32VAC/DC) is suitable for applications operating within this voltage envelope
• Tape & Reel packaging of the substitute part supports automated assembly processes

Applications requiring the full 50VAC/DC contact rating of the original part must evaluate alternative solutions outside the KT series or consult with C&K for additional options.

Frequently Asked Questions (FAQ)

Q: Can the KT11P2SA3M35LFG be used as a direct replacement for the KT11P2SA3M33?

A: The KT11P2SA3M35LFG is mechanically and functionally equivalent to the KT11P2SA3M33 across all critical parameters including circuit configuration, mounting type, actuator orientation, dimensions, operating force, ingress protection, and temperature range. The substitute part is suitable for applications operating at 32VAC/DC or below. Applications requiring 50VAC/DC operation must confirm that the lower voltage rating is acceptable for the circuit design.

Q: What is the primary difference between these two parts?

A: The primary difference is the contact rating voltage specification. The KT11P2SA3M33 is rated for 1VA @ 50VAC/DC, while the KT11P2SA3M35LFG is rated for 1VA @ 32VAC/DC. Additionally, the substitute part is Active and ROHS3 compliant, whereas the original is Obsolete and RoHS non-compliant.

Q: Are the physical dimensions and mounting characteristics identical?

A: Yes. Both parts share identical outline dimensions (7.77mm x 4.61mm), mounting type (Surface Mount, Right Angle), actuator orientation (Side Actuated), termination style (Gull Wing), and all mechanical specifications including operating force (300gf) and mechanical life (100,000 Cycles).

Q: What packaging options are available?

A: The KT11P2SA3M33 packaging specification is not provided. The KT11P2SA3M35LFG is available in Tape & Reel (TR) packaging, which is standard for automated assembly processes.

Q: Are there any compliance or regulatory differences?

A: Yes. The KT11P2SA3M35LFG is ROHS3 compliant, while the KT11P2SA3M33 is RoHS non-compliant. Both parts are REACH Unaffected and classified under ECCN EAR99. The substitute part aligns with current regulatory requirements for new designs.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of -40°C to 90°C, ensuring thermal compatibility in equivalent applications.