KT11B1SAM33 Equivalent & Substitute Parts

Part Overview

The KT11B1SAM33 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 to maintain design continuity and ensure supply chain availability.

Substiute Parts

KT11B1SAM33

C&KIn Stock: 954KT11B1SAM33 Datasheet

Current PartRFQ

KT11B1SAM35LFG

C&KIn Stock: 13360KT11B1SAM35LFG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT11B1SAM33 is determined by strict equivalence across the following critical parameters:

• Circuit Configuration & Function: SPST-NO with Off-Mom switching function must remain constant
• Mechanical Compatibility: Surface mount, right-angle orientation with side actuation and gull wing termination must be preserved
• Physical Dimensions: Outline of 7.57mm x 4.38mm ensures PCB layout compatibility
• Operational Characteristics: Operating force (300gf), temperature range (-40°C ~ 90°C), and mechanical life (100,000 cycles) must be maintained
• Environmental Protection: IP57 sealed construction with rubber actuator material must be retained
• Voltage Rating Consideration: The substitute part operates at 1VA @ 32VAC/DC, which represents a lower voltage rating than the original 50V specification. This substitution is valid only in applications where the circuit voltage does not exceed 32V.

The KT11B1SAM35LFG qualifies as a direct substitute based on matching all mechanical, functional, and environmental parameters, with the noted voltage rating differential.

Parameter Comparison

Engineering Selection Recommendations

The KT11B1SAM35LFG is the active equivalent for the obsolete KT11B1SAM33. Selection of this substitute is based on the following engineering criteria:

Product Status: The KT11B1SAM35LFG maintains active production status, ensuring long-term supply chain availability and component traceability compared to the obsolete KT11B1SAM33.

Regulatory Compliance: The substitute part achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current environmental and regulatory requirements for electronic component manufacturing and distribution.

Voltage Rating: The substitute operates at 1VA @ 32VAC/DC versus the original 50V rating. This substitution is valid for applications operating at or below 32V. Applications requiring operation above 32V cannot use this substitute.

Packaging Format: The substitute is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes and provides improved handling and storage characteristics compared to bulk packaging.

Mechanical and Functional Equivalence: All mechanical parameters, circuit configuration, environmental protection ratings, and operational characteristics remain identical, ensuring direct functional replacement within voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can the KT11B1SAM35LFG replace the KT11B1SAM33 in all applications?

A: The KT11B1SAM35LFG is mechanically and functionally equivalent to the KT11B1SAM33. However, the substitute operates at a maximum voltage rating of 32V compared to the original 50V. Substitution is valid only for applications where circuit voltage does not exceed 32VAC/DC.

Q: What is the primary reason for substituting the KT11B1SAM33?

A: The KT11B1SAM33 is obsolete and no longer in active production. The KT11B1SAM35LFG provides an active, readily available alternative with identical mechanical and functional characteristics.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical outline dimensions of 7.57mm x 4.38mm, identical mounting type (surface mount, right angle), and identical termination style (gull wing). PCB layout compatibility is maintained.

Q: What is the difference in RoHS compliance between these parts?

A: The KT11B1SAM33 is RoHS non-compliant, while the KT11B1SAM35LFG is ROHS3 compliant. The substitute meets current environmental regulations for restricted substances in electrical and electronic equipment.

Q: Does packaging format affect component performance?

A: No. The packaging format difference (bulk versus Tape & Reel) does not affect electrical or mechanical performance. Tape & Reel packaging is standard for automated assembly and provides improved handling characteristics.

Q: Are the operating temperature ranges the same?

A: Yes. Both parts operate across the identical temperature range of -40°C to 90°C with the same mechanical life specification of 100,000 cycles.

Q: What environmental protection rating do these switches provide?

A: Both parts provide IP57 ingress protection (dust protected and waterproof) with sealed construction and rubber actuator material, ensuring equivalent environmental performance.