ST27KMCB Toggle Switch SP3T Equivalent & Substitute Parts

Part Overview

The ST27KMCB is a toggle switch manufactured by APEM Inc., classified as a SP3T (single pole, three throw) panel mount switch with a rated capacity of 0.4VA at 20V. This switch features a standard round actuator with PC pin termination and is designed for On-On-Mom switching function. The product is currently obsolete, making identification of compatible substitute components essential for ongoing maintenance, repair, and new design implementations where equivalent functionality is required.

Substiute Parts

ST27KMCB

APEM Inc.In Stock: 1165ST27KMCB Datasheet

Current PartRFQ

7213SYCBE

C&KIn Stock: 11127213SYCBE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST27KMCB is determined by strict alignment of the following critical parameters:

Electrical Compatibility Parameters:

• Circuit configuration: SP3T
• Switch function: On-On-Mom
• Current rating: 0.4VA (AC/DC)
• Voltage rating: 20V AC and 20V DC

Mechanical Compatibility Parameters:

• Mounting type: Panel Mount
• Actuator type: Standard Round
• Termination style: PC Pin
• Panel cutout dimensions: Circular - 6.35mm Dia
• Bushing thread: 1/4-40

Environmental & Compliance Parameters:

• Operating temperature range: -30°C ~ 85°C
• Electrical life: 40,000 Cycles
• RoHS3 Compliance

The substitute part 7213SYCBE manufactured by C&K meets all critical electrical and mechanical parameters, enabling direct functional replacement in applications requiring SP3T toggle switch performance at the specified voltage and current ratings.

Parameter Comparison

Engineering Selection Recommendations

The 7213SYCBE manufactured by C&K is the qualified substitute for the obsolete ST27KMCB. Selection of this substitute is supported by the following engineering factors:

Electrical Equivalence: Both components share identical circuit configuration (SP3T), switching function (On-On-Mom), current rating (0.4VA AC/DC), and voltage ratings (20V AC/DC), ensuring direct functional replacement without circuit modification.

Mechanical Compatibility: Panel mount configuration, standard round actuator, PC pin termination, and identical panel cutout dimensions (6.35mm circular) and bushing thread (1/4-40) enable direct mechanical installation in existing panel layouts.

Environmental Performance: Both components operate across the identical temperature range (-30°C ~ 85°C) and maintain equivalent electrical life specifications (40,000 cycles), ensuring consistent performance in the target application environment.

Compliance Status: The 7213SYCBE maintains ROHS3 compliance equivalent to the original component. The substitute is currently in active production status, ensuring long-term availability and supply chain continuity.

Minor Dimensional Variation: The actuator length differs by 0.26mm (10.41mm vs. 10.67mm). This variation is within typical mechanical tolerances for toggle switch actuators and does not impact functional compatibility or panel mounting.

Frequently Asked Questions (FAQ)

Q: Can the 7213SYCBE directly replace the ST27KMCB without circuit modifications?

A: Yes. Both components share identical electrical specifications (SP3T, On-On-Mom, 0.4VA, 20V AC/DC) and mechanical interfaces (panel mount, PC pin termination, 6.35mm cutout, 1/4-40 bushing thread), enabling direct substitution without circuit or panel layout changes.

Q: What is the significance of the actuator length difference between the two components?

A: The ST27KMCB has an actuator length of 10.41mm, while the 7213SYCBE measures 10.67mm. This 0.26mm difference falls within standard mechanical tolerances for toggle switch actuators and does not affect functional performance or panel mounting compatibility.

Q: Why is the ST27KMCB listed as obsolete?

A: The ST27KMCB is no longer manufactured by APEM Inc. The 7213SYCBE from C&K provides equivalent functionality and is maintained in active production, making it the appropriate choice for new designs and replacement applications.

Q: Are there compliance differences between the two components?

A: Both components are ROHS3 compliant. The 7213SYCBE is subject to REACH regulations, while the ST27KMCB is listed as REACH unaffected. Both components carry the same ECCN classification (EAR99) and HTSUS code (8536.50.9065).

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

A: The 7213SYCBE is supplied in bulk packaging, whereas the original ST27KMCB was supplied with standard packaging. Confirm packaging requirements with your procurement department when ordering the substitute component.

Q: Are the electrical life specifications equivalent?

A: Yes. Both the ST27KMCB and 7213SYCBE are rated for 40,000 electrical cycles, ensuring equivalent operational longevity in switching applications.