KT11B2JM Equivalent & Substitute Parts

Part Overview

The KT11B2JM 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 component features top actuation, sealed construction with IP57 ingress protection, and is designed for applications requiring reliable momentary switching in dust and moisture-prone environments. The KT11B2JM is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

KT11B2JM

C&KIn Stock: 732KT11B2JM Datasheet

Current PartRFQ

KT11B2JM34 LFS

C&KIn Stock: 4023KT11B2JM34 LFS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KT11B2JM is determined by strict alignment with the following critical parameters:

• Circuit configuration must remain SPST-NO
• Switch function must be Off-Mom (momentary operation)
• Mounting type must be Surface Mount
• Actuator orientation must be Top Actuated
• Outline dimensions must be 6.38mm x 6.22mm
• Termination style must be J Lead
• Ingress protection must maintain IP57 rating
• Operating temperature range must encompass -40°C ~ 90°C
• Mechanical life must meet or exceed 100,000 cycles
• Actuator material must be Rubber
• Non-illuminated configuration required

The contact rating voltage may vary within acceptable operational limits for the application. The KT11B2JM34 LFS meets all these criteria and is classified as an active product, making it a direct substitute for obsolete unit replacement.

Parameter Comparison

Engineering Selection Recommendations

The KT11B2JM34 LFS is the designated substitute for the obsolete KT11B2JM. Selection of this substitute is supported by the following engineering factors:

Product Status: The KT11B2JM is obsolete, while the KT11B2JM34 LFS maintains active product status with confirmed inventory availability (4002 units in stock versus 696 units for the original part).

Regulatory Compliance: The KT11B2JM34 LFS achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 ECCN classification.

Electrical Compatibility: The substitute operates at 1VA @ 32VAC/DC, compared to the original 1VA @ 50VAC/DC. This represents a reduced voltage rating; applications operating at or below 32V are fully compatible. Applications requiring the full 50V rating of the original part require circuit voltage verification before substitution.

Mechanical and Physical Compatibility: All critical mechanical parameters are identical: surface mount configuration, 5.24mm actuator height, 6.38mm x 6.22mm outline, J Lead termination, IP57 ingress protection, -40°C to 90°C operating range, 100,000 cycle mechanical life, and rubber actuator material.

Packaging Consideration: The substitute is supplied in Tape & Reel (TR) format, suitable for automated assembly processes, whereas the original part was supplied in bulk packaging.

Frequently Asked Questions (FAQ)

Q: Can the KT11B2JM34 LFS be used as a direct replacement for the KT11B2JM in all applications?

A: The KT11B2JM34 LFS is mechanically and functionally compatible with the KT11B2JM for all applications operating at circuit voltages of 32V or below. Applications requiring the full 50V contact rating of the original part must be evaluated for voltage compatibility before substitution.

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

A: The primary difference is the contact rating voltage: the original KT11B2JM is rated at 50VAC/DC, while the substitute KT11B2JM34 LFS is rated at 32VAC/DC. All other electrical, mechanical, and environmental specifications are identical.

Q: Does the KT11B2JM34 LFS meet current regulatory requirements?

A: Yes. The KT11B2JM34 LFS is ROHS3 compliant, whereas the original KT11B2JM is RoHS non-compliant. Both parts are REACH Unaffected.

Q: Are the physical dimensions and mounting characteristics identical?

A: Yes. Both parts share identical surface mount configuration, actuator height (5.24mm), outline dimensions (6.38mm x 6.22mm), J Lead termination, and IP57 ingress protection rating.

Q: What is the operating force specification for the substitute part?

A: The KT11B2JM34 LFS specifies an operating force of 300gf. The original KT11B2JM does not provide an operating force specification in the available documentation.

Q: How does packaging differ between these parts?

A: The original KT11B2JM is supplied in bulk packaging, while the KT11B2JM34 LFS is supplied in Tape & Reel (TR) format, which is standard for automated surface mount assembly processes.

Q: Is the KT11B2JM34 LFS currently available?

A: Yes. The KT11B2JM34 LFS is an active product with 4002 units in stock, compared to the obsolete KT11B2JM with limited remaining inventory of 696 units.