KT11P2SA2M33 Equivalent & Substitute Parts

Part Overview

The KT11P2SA2M33 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, making it suitable for applications requiring dust and water resistance. The part is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

KT11P2SA2M33

C&KIn Stock: 904KT11P2SA2M33 Datasheet

Current PartRFQ

KT11P2SA2M35LFG

C&KIn Stock: 6413KT11P2SA2M35LFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT11P2SA2M33 is determined by the following critical parameters that must remain consistent:

• Circuit Configuration: SPST-NO topology must be maintained
• Mounting Type: Surface mount, right-angle orientation required
• Actuator Orientation: Side actuated configuration
• Outline Dimensions: 7.77mm x 6.41mm footprint compatibility
• Operating Force: 300gf actuation force
• Ingress Protection: IP57 sealed construction
• Operating Temperature Range: -40°C ~ 90°C
• Mechanical Life: 100,000 cycles minimum
• Termination Style: Gull wing leads

The KT11P2SA2M35LFG 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 transition from obsolete to active.

Parameter Comparison

Engineering Selection Recommendations

The KT11P2SA2M35LFG is the active equivalent for the obsolete KT11P2SA2M33. Selection of the substitute part is supported by the following factors:

• Product Status: The substitute transitions from obsolete to active status, ensuring continued availability and manufacturing support
• Compliance: The KT11P2SA2M35LFG achieves ROHS3 compliance, whereas the original part is RoHS non-compliant, meeting current regulatory requirements
• Mechanical Compatibility: Identical footprint, mounting orientation, and actuator specifications ensure direct PCB compatibility without layout modifications
• Functional Equivalence: Matching circuit topology, operating force, ingress protection, and temperature range preserve application performance
• Voltage Consideration: The substitute operates at 32VAC/DC versus the original 50VAC/DC. Applications operating at or below 32VAC/DC can use this substitute without circuit modification. Applications requiring 50VAC/DC operation must verify that the lower voltage rating is acceptable for the intended circuit design

Frequently Asked Questions (FAQ)

Q: Can the KT11P2SA2M35LFG be used as a direct replacement for the KT11P2SA2M33 on existing PCBs?

A: Yes, the substitute part shares identical mechanical dimensions (7.77mm x 6.41mm), mounting type (surface mount, right angle), and termination style (gull wing). No PCB layout modifications are required for physical installation.

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

A: The main differences are contact rating voltage (32VAC/DC for the substitute versus 50VAC/DC for the original), product status (active versus obsolete), and RoHS compliance (ROHS3 compliant versus non-compliant). All mechanical and functional parameters remain identical.

Q: Is the lower voltage rating of the substitute a limitation?

A: The 32VAC/DC rating of the KT11P2SA2M35LFG is suitable for applications operating at or below this voltage level. If your circuit requires 50VAC/DC operation, verify that the lower rating is compatible with your design specifications before substitution.

Q: What packaging options are available for the substitute part?

A: The KT11P2SA2M35LFG is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production and automated assembly processes.

Q: Are there any compliance advantages to using the substitute part?

A: Yes, the KT11P2SA2M35LFG is ROHS3 compliant, whereas the original KT11P2SA2M33 is RoHS non-compliant. This makes the substitute suitable for applications and markets with RoHS regulatory requirements.

Q: Do both parts share the same series designation?

A: Yes, both parts belong to the C&K KT series and share the same base product number (KT11P2), confirming their design family relationship and functional equivalence.