C&K 7201MH3CKI Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The C&K 7201MH3CKI is a panel-mount toggle switch with DPDT (Double Pole Double Throw) configuration, rated for 0.4VA at 20V AC/DC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and new designs requiring compatible functionality.

The switch features a standard round actuator with PC pin termination, epoxy potting, and an operating temperature range of -30°C to 85°C. With 100,000 electrical cycles and ROHS3 compliance, this switch serves applications requiring reliable dual-pole switching in compact panel-mount form factors.

Substiute Parts

7201MH3CKI

C&KIn Stock: 10147201MH3CKI Datasheet

Current PartRFQ

7201MH3CPI

C&KIn Stock: 8237201MH3CPI Datasheet

DirectRFQ

100DP1T2B3M2REH

E-SwitchIn Stock: 2129100DP1T2B3M2REH Datasheet

SimilarRFQ

A223M1CWCQ

ElectroswitchIn Stock: 767A223M1CWCQ Datasheet

SimilarRFQ

A223P31DCQ

ElectroswitchIn Stock: 861A223P31DCQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7201MH3CKI is determined by strict alignment with the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: DPDT
• Switch function: On-On
• Mounting type: Panel Mount
• Termination style: PC Pin
• Bushing thread: 1/4-40
• Panel cutout dimensions: Circular 6.35mm Dia

Electrical Compatibility Criteria:

• Current rating: 0.4VA (AC/DC) minimum
• Voltage rating: 20V AC/DC minimum
• Operating temperature range: Must encompass -30°C to 85°C

Substitute parts are grouped into two categories: direct manufacturer equivalents from C&K and cross-manufacturer alternatives from E-Switch and Electroswitch. Direct equivalents maintain identical mechanical and electrical specifications with variations in product status and termination features. Cross-manufacturer alternatives provide functional equivalence with higher electrical ratings and different actuator geometries, requiring verification of mechanical fit within the panel assembly.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent (Recommended for Obsolete Part Replacement):

The C&K 7201MH3CPI is the primary substitute for the obsolete 7201MH3CKI. Both parts share identical electrical ratings (0.4VA, 20V AC/DC), mechanical dimensions (6.35mm panel cutout, 1/4-40 bushing thread), and actuator geometry (4.57mm standard round). The 7201MH3CPI maintains 100,000 electrical cycle life and operates across the same temperature range (-30°C to 85°C). The primary distinction is product status: 7201MH3CPI is active with 774 units in stock, whereas 7201MH3CKI is obsolete. The termination feature difference (epoxy sealed terminals versus epoxy potted) does not affect electrical or mechanical compatibility. This part is suitable for direct substitution in existing designs and new applications.

Cross-Manufacturer Alternatives (Higher Electrical Ratings):

The E-Switch 100DP1T2B3M2REH and Electroswitch A223M1CWCQ and A223P31DCQ provide functional DPDT switching with panel-mount configuration and 1/4-40 bushing threads. These alternatives exceed the electrical requirements of the 7201MH3CKI with current ratings of 0.4VA to 6A and voltage ratings of 20V to 125V AC. All three alternatives are active products with established supply availability.

The E-Switch 100DP1T2B3M2REH maintains the closest mechanical alignment with a 5.08mm actuator length and standard round geometry. However, electrical life is reduced to 40,000 cycles compared to the 100,000 cycles of the main part.

The Electroswitch A223M1CWCQ provides a standard round actuator at 5.08mm length with splash-proof ingress protection and 60,000 electrical cycles. The A223P31DCQ variant features a flatted actuator at 11.38mm length, requiring panel cutout verification for mechanical fit.

All cross-manufacturer alternatives are RoHS compliant and operate within the required temperature range. Selection should be based on specific application requirements for electrical capacity, actuator geometry, and mechanical fit within the panel assembly.

Frequently Asked Questions (FAQ)

Q: Can the 7201MH3CPI directly replace the obsolete 7201MH3CKI without circuit modification?

A: Yes. The 7201MH3CPI is electrically and mechanically equivalent to the 7201MH3CKI. Both parts have identical DPDT configuration, 0.4VA current rating, 20V voltage rating, 4.57mm actuator length, and 1/4-40 bushing thread. Panel cutout dimensions and PC pin termination are identical. No circuit modification is required.

Q: What is the difference between the E-Switch and Electroswitch alternatives?

A: The E-Switch 100DP1T2B3M2REH maintains the same 0.4VA current rating as the main part but reduces electrical life to 40,000 cycles. The Electroswitch alternatives (A223M1CWCQ and A223P31DCQ) provide higher electrical ratings (6A, 125V AC) and 60,000 electrical cycles. The primary difference between the two Electroswitch models is actuator type: A223M1CWCQ has a standard round actuator at 5.08mm, while A223P31DCQ has a flatted actuator at 11.38mm.

Q: Are the Electroswitch parts suitable for applications requiring 0.4VA at 20V?

A: Yes. The Electroswitch A223M1CWCQ and A223P31DCQ are rated for 6A at 125V AC and 28V DC, which exceeds the 0.4VA at 20V requirement of the main part. These parts are electrically compatible with applications designed for lower power levels. However, the flatted actuator of the A223P31DCQ requires verification of mechanical fit within the existing panel assembly.

Q: What are the mechanical fit considerations when selecting a substitute?

A: All substitute parts share the 1/4-40 bushing thread and circular 6.35mm panel cutout dimension with the main part. The primary mechanical variable is actuator length and geometry. The 7201MH3CPI and 100DP1T2B3M2REH maintain similar actuator profiles (4.57mm and 5.08mm standard round). The A223M1CWCQ has a 5.08mm standard round actuator. The A223P31DCQ has an 11.38mm flatted actuator, which may require panel cutout modification or clearance verification depending on the enclosure design.

Q: Which substitute part has the longest electrical life?

A: The C&K 7201MH3CPI maintains the same 100,000 electrical cycle life as the main part. The E-Switch 100DP1T2B3M2REH provides 40,000 cycles, while both Electroswitch alternatives provide 60,000 cycles. For applications requiring maximum cycle life, the 7201MH3CPI is the optimal choice.

Q: Are all substitute parts RoHS compliant?

A: Yes. The C&K 7201MH3CPI is RoHS compliant. The E-Switch 100DP1T2B3M2REH is ROHS3 compliant. Both Electroswitch alternatives (A223M1CWCQ and A223P31DCQ) are RoHS compliant. All parts meet current environmental compliance requirements.