KT11B2SAM33 Equivalent & Substitute Parts

Part Overview

The KT11B2SAM33 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, right-angle actuated switch features sealed construction with IP57 ingress protection, making it suitable for applications requiring dust and water resistance. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

KT11B2SAM33

C&KIn Stock: 923KT11B2SAM33 Datasheet

Current PartRFQ

KT11B2SAM35LFG

C&KIn Stock: 47932KT11B2SAM35LFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT11B2SAM33 is based on strict equivalence across the following critical parameters:

• Manufacturer & Series: Both parts must be C&K KT series tactile switches
• Circuit & Function: SPST-NO configuration with Off-Mom (momentary) operation
• Mounting & Orientation: Surface mount, right-angle, side-actuated design with gull wing termination
• Physical Footprint: Identical outline dimensions (7.57mm x 4.38mm)
• Mechanical Characteristics: Operating force (300gf), mechanical life (100,000 cycles), and actuator material (rubber)
• Environmental Specifications: IP57 ingress protection, sealed construction, operating temperature range (-40°C ~ 90°C), and MSL 1 rating
• Voltage Tolerance: Contact rating voltage may vary within acceptable design margins

The KT11B2SAM35LFG qualifies as a direct substitute based on these parameters, with the primary difference being the reduced voltage rating (32V versus 50V) and active product status with improved RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

The KT11B2SAM35LFG is the qualified substitute for the obsolete KT11B2SAM33 based on the following engineering criteria:

Product Status & Availability: The KT11B2SAM33 is obsolete with limited inventory (824 pcs). The KT11B2SAM35LFG maintains active production status with significantly higher availability (47,847 pcs), ensuring long-term supply chain continuity.

Regulatory Compliance: The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification.

Functional Equivalence: Both parts share identical mechanical, electrical, and environmental specifications across all critical parameters. The voltage rating reduction from 50V to 32V represents the only functional difference and is acceptable for applications operating within the 32V maximum specification.

Packaging Consideration: The substitute is supplied in Tape & Reel format, which is standard for production environments and offers cost advantages over bulk packaging for high-volume assembly operations.

Frequently Asked Questions (FAQ)

Q: Can the KT11B2SAM35LFG replace the KT11B2SAM33 in existing designs?

A: Yes, provided the circuit operates at or below 32VAC/DC. The substitute maintains identical mechanical footprint, actuator characteristics, and environmental protection ratings. Verify your application voltage does not exceed 32V before implementation.

Q: What is the primary reason for substitution?

A: The KT11B2SAM33 is obsolete. The KT11B2SAM35LFG is an active equivalent that provides continued availability, improved regulatory compliance (ROHS3), and identical functional performance for applications within its voltage specification.

Q: Are the physical dimensions identical?

A: Yes. Both parts share the same outline dimensions (7.57mm x 4.38mm), gull wing termination, and surface mount right-angle configuration. PCB layout and assembly tooling require no modification.

Q: Does the voltage rating difference affect compatibility?

A: The voltage rating difference is relevant only if your application requires operation above 32V. For applications at or below 32VAC/DC, the substitute is fully compatible. Applications requiring 50V operation cannot use the substitute.

Q: What are the packaging differences?

A: The original part is supplied in bulk packaging. The substitute is supplied in Tape & Reel (TR) format, which is standard for automated assembly and provides better handling and traceability for production environments.

Q: Are both parts sealed and waterproof?

A: Yes. Both the KT11B2SAM33 and KT11B2SAM35LFG feature sealed construction with IP57 ingress protection (dust protected, waterproof), identical operating temperature range (-40°C ~ 90°C), and MSL 1 moisture sensitivity rating.