C&K 7401SYCLE Toggle Switch 4PDT 5A 120V Equivalent & Substitute Parts

Part Overview

The C&K 7401SYCLE is a panel-mount toggle switch with 4PDT (four-pole double-throw) configuration rated for 5A at 120V AC and 28V DC. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The switch features epoxy-sealed PC pin terminals, a circular 6.35mm panel cutout, and operates across -30°C to 85°C. Direct replacements and functionally equivalent alternatives are available from C&K and other manufacturers.

Substiute Parts

7401SYCLE

C&KIn Stock: 7127401SYCLE Datasheet

Current PartRFQ

7401SYCRE

C&KIn Stock: 7437401SYCRE Datasheet

DirectRFQ

A423S1HCQ

ElectroswitchIn Stock: 902A423S1HCQ Datasheet

SimilarRFQ

A423S1YCQ

ElectroswitchIn Stock: 709A423S1YCQ Datasheet

SimilarRFQ

MTA406NPC

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1032MTA406NPC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters: circuit configuration (4PDT), switch function (On-On), mounting type (panel mount), termination style (PC pin), bushing thread (1/4-40), and mechanical compatibility (actuator type and panel cutout dimensions). Current and voltage ratings establish the upper operational limits; substitute parts must meet or exceed the main part's electrical specifications. Operating temperature range, electrical life, and compliance certifications (RoHS, REACH, ECCN) are secondary factors that influence suitability for specific applications.

The substitute parts are grouped into two categories: direct manufacturer equivalents from C&K and functionally equivalent alternatives from other manufacturers. Direct equivalents maintain identical mechanical and electrical specifications with updated product status. Functionally equivalent alternatives provide the same circuit configuration and mounting interface but may have variations in current rating, voltage rating, actuator length, operating temperature, or electrical life.

Parameter Comparison

Engineering Selection Recommendations

The C&K 7401SYCRE is the primary direct replacement for the obsolete 7401SYCLE. Both parts are manufactured by C&K, share identical electrical and mechanical specifications, and maintain the same 100,000-cycle electrical life rating. The 7401SYCRE is currently in active production status and carries RoHS compliance certification, making it the preferred choice for direct substitution in existing designs.

The Electroswitch A423S1HCQ and A423S1YCQ are functionally equivalent alternatives that provide higher current ratings (6A versus 5A) and slightly elevated voltage ratings (125V AC versus 120V AC). These parts are suitable for applications where the increased electrical capacity provides design margin. Both Electroswitch alternatives are RoHS compliant and active in production. The reduced electrical life specification (60,000 cycles versus 100,000 cycles) should be evaluated against application duty cycle requirements.

The TE Connectivity MTA406NPC offers 6A AC current rating with 4A DC rating and operates across -20°C to 80°C. This part is ROHS3 compliant and REACH affected. The narrower operating temperature range and unspecified electrical life require assessment against application environmental conditions. The MTA406NPC is suitable for applications where the TE Connectivity ecosystem integration provides additional value.

All substitute parts maintain the critical 4PDT circuit configuration, On-On switch function, panel mount interface, PC pin termination, and 1/4-40 bushing thread required for mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 7401SYCRE directly replace the obsolete 7401SYCLE without circuit modification?

A: Yes. The 7401SYCRE is a direct equivalent with identical circuit configuration (4PDT), electrical ratings (5A, 120V AC, 28V DC), and mechanical specifications. No circuit or panel modifications are required.

Q: Are the Electroswitch A423S1HCQ and A423S1YCQ suitable for applications requiring 5A at 120V?

A: Yes. Both Electroswitch parts are rated for 6A at 125V AC, which exceeds the 5A at 120V AC requirement of the main part. The higher ratings provide operational margin. However, the reduced electrical life (60,000 cycles versus 100,000 cycles) must be evaluated against application cycling requirements.

Q: What is the impact of the 0.26mm difference in actuator length between the main part and substitute parts?

A: The main part has a 10.67mm actuator length, while Electroswitch alternatives have 10.41mm and TE Connectivity has 10.49mm. These variations are within typical manufacturing tolerances for panel-mount toggle switches and do not affect mechanical compatibility with standard panel cutouts. Panel clearance should be verified for applications with tight spatial constraints.

Q: Are all substitute parts RoHS compliant?

A: Yes. The C&K 7401SYCRE is RoHS compliant. The Electroswitch A423S1HCQ and A423S1YCQ are RoHS compliant. The TE Connectivity MTA406NPC is ROHS3 compliant. All parts meet RoHS requirements for new designs.

Q: What is the difference between the C&K 7401SYCRE and the Electroswitch alternatives in terms of REACH status?

A: The C&K 7401SYCRE is REACH affected, indicating it contains substances of concern. The Electroswitch A423S1HCQ and A423S1YCQ have vendor-undefined REACH status. Applications subject to REACH regulations should confirm compliance status with the respective manufacturers.

Q: Can the TE Connectivity MTA406NPC be used in applications requiring continuous operation at -30°C?

A: No. The MTA406NPC operates across -20°C to 80°C, which does not meet the -30°C lower temperature limit of the main part. The C&K 7401SYCRE or Electroswitch alternatives, which operate to -30°C, are required for low-temperature applications.

Q: What is the significance of the 100,000-cycle electrical life rating of the main part compared to the 60,000-cycle rating of Electroswitch alternatives?

A: The main part and C&K 7401SYCRE are rated for 100,000 electrical cycles, while Electroswitch alternatives are rated for 60,000 cycles. For applications with high switching frequency or long service life requirements, the higher cycle rating of C&K parts provides extended operational life. Applications with lower duty cycles may accept the reduced rating of Electroswitch alternatives.