KT11P2SA2M31 Equivalent & Substitute Parts

Part Overview

The KT11P2SA2M31 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 applications requiring IP57 ingress protection. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing production and maintenance applications.

Substiute Parts

KT11P2SA2M31

C&KIn Stock: 838KT11P2SA2M31 Datasheet

Current PartRFQ

KT11P2SA2M34LFS

C&KIn Stock: 1153KT11P2SA2M34LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT11P2SA2M31 is determined by the following critical parameters that must remain consistent:

• Circuit Configuration: SPST-NO topology must be maintained
• Switch Function: Off-Mom (momentary) operation required
• Mounting Type: Surface mount, right-angle configuration
• Actuator Orientation: Side actuated design
• Operating Force: 300gf actuation force
• Ingress Protection: IP57 sealed specification
• Operating Temperature: -40°C ~ 90°C range
• Mechanical Life: 100,000 cycles minimum
• Termination Style: Gull wing leads

The KT11P2SA2M34LFS qualifies as a direct substitute based on these parameters. While the contact voltage rating differs (32V versus 50V), this represents a downrating that is acceptable in substitution scenarios where the actual operating voltage does not exceed 32V.

Parameter Comparison

Engineering Selection Recommendations

The KT11P2SA2M34LFS is the qualified substitute for the obsolete KT11P2SA2M31 based on the following engineering criteria:

Functional Equivalence: Both parts maintain identical SPST-NO circuit topology, momentary switch function, side-actuated design, and sealed IP57 ingress protection. Operating force, temperature range, and mechanical life specifications are identical.

Voltage Consideration: The substitute operates at a maximum of 32V compared to the original 50V rating. Selection of this substitute is appropriate only when the actual circuit operating voltage does not exceed 32V. If the application requires operation above 32V, this substitute is not suitable.

Compliance Status: The KT11P2SA2M34LFS is ROHS3 compliant and currently in active production, whereas the original part is obsolete and RoHS non-compliant. This substitution aligns with current environmental and regulatory requirements.

Physical Dimensions: Outline dimensions differ slightly (7.77mm x 6.41mm versus 6.60mm x 6.60mm). PCB layout verification is required to confirm that the substitute component fits within the available mounting space and does not create clearance conflicts with adjacent components.

Packaging Format: The substitute is supplied in Tape & Reel format, which may require adjustment to procurement and assembly processes if the original was supplied in bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the KT11P2SA2M34LFS be used as a direct replacement for the KT11P2SA2M31?

A: Yes, provided that the circuit operating voltage does not exceed 32V. The substitute maintains all critical functional parameters including circuit configuration, switch function, mounting type, actuator orientation, operating force, ingress protection, and temperature range. Physical dimensions require PCB layout verification.

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

A: The main difference is the contact voltage rating: the original supports 50V, while the substitute is rated for 32V. Both parts are rated for 1VA at their respective voltage limits. If your application operates at or below 32V, this difference is not a limiting factor.

Q: Are there any mechanical compatibility issues?

A: The outline dimensions differ slightly. The original measures 6.60mm x 6.60mm, while the substitute measures 7.77mm x 6.41mm. Verify that the substitute fits within the available PCB footprint and does not interfere with adjacent components.

Q: What is the impact of the packaging change from bulk to Tape & Reel?

A: Tape & Reel packaging is standard for automated assembly processes. If your manufacturing process uses automated pick-and-place equipment, this packaging format is compatible. If manual assembly or bulk handling is required, coordinate with your supplier regarding packaging options.

Q: Why is the original part obsolete?

A: The KT11P2SA2M31 is classified as obsolete by the manufacturer. The KT11P2SA2M34LFS represents the current production equivalent within the KT series and is recommended for new designs and ongoing production requirements.

Q: Does the substitute meet current environmental standards?

A: Yes. The KT11P2SA2M34LFS is ROHS3 compliant, meeting current environmental regulations. The original part is RoHS non-compliant, making the substitute preferable for applications subject to environmental compliance requirements.