NKK Switches B12KV Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The NKK Switches B12KV is an active-status toggle switch featuring SPDT (Single Pole Double Throw) circuitry with 0.4VA current rating at 28V. This through-hole, right-angle vertical mount component is designed for applications requiring reliable on-on switching functionality with epoxy sealed terminals. Substitute parts are identified to provide design flexibility when the primary part is unavailable or when alternative manufacturers' specifications align with application requirements.

Substiute Parts

B12KV

NKK SwitchesIn Stock: 663B12KV Datasheet

Current PartRFQ

A12KV

NKK SwitchesIn Stock: 806A12KV Datasheet

SimilarRFQ

34CMSP12B2M7RT

Grayhill Inc.In Stock: 78334CMSP12B2M7RT Datasheet

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34CMSP12B4M7RT

Grayhill Inc.In Stock: 112534CMSP12B4M7RT Datasheet

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T101MH9AVBE

C&KIn Stock: 1261T101MH9AVBE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the B12KV is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration: SPDT
• Switch function: On-On
• Current rating: 0.4VA (AC/DC)
• Mounting type: Through Hole, Right Angle, Vertical
• Termination style: PC Pin
• Operating temperature range: -30°C to 85°C
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity level: 1 (Unlimited)

Secondary Compatibility Factors:

• Voltage rating compatibility (application-dependent)
• Actuator length tolerance (5.00mm to 5.33mm)
• Electrical life rating (minimum 30,000 cycles)

The identified substitute parts meet all primary criteria. Voltage rating variations (28V primary vs. 20V substitutes) require application-level verification to ensure suitability for specific circuit designs.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the primary B12KV component.

NKK Switches A12KV: Identical electrical specifications and operating temperature range to the B12KV. Differs in series designation (A vs. B), bushing thread configuration (square vs. unthreaded), and actuator material (polyamide glass-filled vs. unspecified). Maintains equivalent electrical life rating at 50,000 cycles. Suitable for direct substitution where mechanical interface compatibility is confirmed.

Grayhill Inc. 34CMSP12B2M7RT and 34CMSP12B4M7RT: Both parts share identical electrical specifications with reduced voltage rating (20V vs. 28V). Electrical life is reduced to 30,000 cycles compared to the B12KV's 50,000 cycles. Actuator type differs (standard round vs. lever for cap). These parts are suitable only for applications operating at 20V or below and where the reduced electrical life cycle meets design requirements.

C&K T101MH9AVBE: Operates at 20V voltage rating with extended electrical life of 60,000 cycles. REACH status is affected, requiring compliance verification for applications subject to REACH regulations. Suitable for 20V applications where extended cycle life is beneficial and REACH compliance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the B12KV be replaced with the A12KV in any application?

A: Both parts share identical electrical ratings (0.4VA, 28V AC/DC), circuit configuration (SPDT), and operating temperature range (-30°C to 85°C). Substitution is valid from an electrical standpoint. Mechanical compatibility must be verified, specifically the bushing thread configuration (A12KV features square threading) and actuator material differences.

Q: What is the voltage limitation when using Grayhill or C&K substitutes?

A: The Grayhill 34CMSP12B2M7RT, 34CMSP12B4M7RT, and C&K T101MH9AVBE are rated for 20V maximum (AC/DC), compared to the B12KV's 28V rating. These parts are suitable only for applications operating at 20V or below. Using them in 28V circuits exceeds their voltage specification.

Q: How does electrical life affect part selection?

A: The B12KV and A12KV are rated for 50,000 electrical cycles. The Grayhill parts are rated for 30,000 cycles, while the C&K part is rated for 60,000 cycles. Selection depends on application duty cycle requirements. Lower cycle ratings may be acceptable for low-frequency switching applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts (A12KV, 34CMSP12B2M7RT, 34CMSP12B4M7RT, and T101MH9AVBE) maintain ROHS3 compliance, matching the primary B12KV component.

Q: What is the difference between the two Grayhill parts (34CMSP12B2M7RT and 34CMSP12B4M7RT)?

A: Both Grayhill parts share identical electrical specifications, voltage ratings, operating temperature, and electrical life. The difference lies in the base product number designation (34CMSP12B2M7RT vs. 34CMSP12B4M7RT), which reflects internal product line variations. From an electrical and mechanical standpoint, they are equivalent for substitution purposes.

Q: Does the C&K T101MH9AVBE have any regulatory considerations?

A: The T101MH9AVBE is REACH Affected, whereas the B12KV is REACH Unaffected. Applications subject to REACH regulations must verify compliance before substitution. The part remains ROHS3 compliant and EAR99 classified.

Q: What packaging options are available for substitute parts?

A: The B12KV is supplied in standard packaging. The A12KV is available in bulk packaging. Grayhill parts (34CMSP12B2M7RT and 34CMSP12B4M7RT) are supplied in bulk packaging. The C&K T101MH9AVBE is supplied in tray packaging. Packaging selection may affect procurement and handling procedures.