U41SYCLE Toggle Switch 4PDT 5A 120V Equivalent & Substitute Parts

Part Overview

The C&K U41SYCLE is a 4PDT toggle switch rated for 5A at 120V AC with panel mount configuration and PC pin termination. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. The switch features epoxy sealed terminals, brass chrome-plated actuator, and operates across -30°C to 85°C. Substitute parts must maintain electrical compatibility while accommodating mechanical and operational variations.

Key Parameters

Parameter	U41SYCLE Specification
Manufacturer	C&K
Circuit Configuration	4PDT
Switch Function	On-On
Current Rating	5A (AC/DC)
Voltage Rating - AC	120V
Voltage Rating - DC	28V
Mounting Type	Panel Mount
Termination Style	PC Pin
Panel Cutout Dimensions	Circular - 6.35mm Dia
Bushing Thread	1/4-40
Actuator Type	Standard Round
Actuator Length	10.67mm
Operating Temperature	-30°C ~ 85°C
Electrical Life	100,000 Cycles
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

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

Mandatory Compatibility Parameters:

Circuit Configuration: 4PDT (four poles, double throw)
Switch Function: On-On
Mounting Type: Panel Mount
Termination Style: PC Pin
Panel Cutout Dimensions: Circular - 6.35mm Dia
Bushing Thread: 1/4-40
Operating Temperature Range: -30°C ~ 85°C (minimum requirement)

Electrical Compatibility Parameters:

Current Rating: Minimum 5A (AC/DC)
Voltage Rating - AC: Minimum 120V
Voltage Rating - DC: Minimum 28V

Mechanical Compatibility Parameters:

Actuator Material: Brass, Chrome Plated
Termination: PC Pin configuration

Substitute parts are grouped into two categories:

Direct Equivalent (Active Status): U41SYCRE from C&K maintains identical specifications with active product status and improved compliance documentation.

Functional Equivalents (Alternative Manufacturers): Parts from E-Switch, Grayhill Inc., and Electroswitch meet all mandatory electrical and mechanical parameters. Variations in actuator length, electrical life, and voltage ratings are noted where they exceed minimum requirements or fall below the original specification.

Parameter Comparison

Part Number	Manufacturer	Circuit	Current Rating	Voltage AC	Voltage DC	Actuator Type	Actuator Length (mm)	Electrical Life (Cycles)	Product Status	RoHS Status
U41SYCLE	C&K	4PDT	5A	120V	28V	Standard Round	10.67	100,000	Obsolete	ROHS3
U41SYCRE	C&K	4PDT	5A	120V	28V	Standard Round	10.67	100,000	Active	RoHS
1004P1T6B11M2QE	E-Switch	4PDT	5A	120V	28V	Flat Anti-Rotation	12.30	40,000	Active	ROHS3
1004P1T6B11M2QEH	E-Switch	4PDT	5A	120V	28V	Flat Anti-Rotation	12.30	40,000	Active	ROHS3
34A4P11B1M2GT	Grayhill Inc.	4PDT	5A	125V	28V	Standard Round	10.41	40,000	Active	ROHS3
34A4P11B1M2QT	Grayhill Inc.	4PDT	5A	125V	28V	Standard Round	10.41	40,000	Active	RoHS
34A4P11B6M2GT	Grayhill Inc.	4PDT	5A	125V	28V	Standard Round	9.90	40,000	Active	ROHS3
A423S1YCQ	Electroswitch	4PDT	6A	125V	28V	Standard Round	10.41	60,000	Active	RoHS
A423S1HCQ	Electroswitch	4PDT	6A	125V	28V	Standard Round	10.41	60,000	Active	RoHS

Engineering Selection Recommendations

Primary Recommendation: U41SYCRE (C&K)

U41SYCRE is the direct active equivalent from the original manufacturer. It maintains identical electrical specifications (5A, 120V AC, 28V DC), mechanical configuration, and actuator dimensions. The part is currently in active production status with 923 units in stock. RoHS compliance is documented, and REACH status is affected, indicating current regulatory alignment. This part eliminates any mechanical or electrical redesign requirements.

Secondary Recommendations: Grayhill Inc. 34A Series

Parts 34A4P11B1M2GT, 34A4P11B1M2QT, and 34A4P11B6M2GT meet all mandatory electrical and mechanical parameters. These parts feature 5A current rating at 125V AC (exceeding the 120V requirement), standard round actuators compatible with the original panel cutout, and identical bushing thread specifications. Electrical life is rated at 40,000 cycles compared to the original 100,000 cycles. Actuator lengths range from 9.90mm to 10.41mm, providing mechanical compatibility within typical panel mount tolerances. All parts maintain PC pin termination and -30°C to 85°C operating temperature range.

Alternative Recommendation: E-Switch 1004P1 Series

Parts 1004P1T6B11M2QE and 1004P1T6B11M2QEH provide electrical equivalence with 5A at 120V AC and 28V DC. These parts feature flat anti-rotation actuators with 12.30mm length, requiring panel cutout verification for mechanical fit. Electrical life is 40,000 cycles. Both parts are ROHS3 compliant and actively produced with high inventory availability (768 and 1114 units respectively).

Higher Current Alternative: Electroswitch A423S1 Series

Parts A423S1YCQ and A423S1HCQ exceed electrical specifications with 6A current rating at 125V AC. These parts are suitable for applications requiring higher current capacity. Electrical life is 60,000 cycles. Standard round actuators and 10.41mm length provide mechanical compatibility. RoHS compliance is documented. These parts are appropriate when design margins for current capacity are desired.

Frequently Asked Questions (FAQ)

Q: Can U41SYCLE be directly replaced with U41SYCRE?

A: Yes. U41SYCRE is the active production equivalent from C&K with identical electrical ratings (5A, 120V AC, 28V DC), circuit configuration (4PDT), and mechanical specifications. No design changes are required.

Q: What is the primary difference between U41SYCLE and E-Switch 1004P1 series parts?

A: The primary difference is actuator type and length. U41SYCLE uses a standard round actuator at 10.67mm, while 1004P1 series uses flat anti-rotation actuators at 12.30mm. Both maintain identical electrical ratings and panel cutout dimensions (6.35mm circular). Panel depth and actuator clearance must be verified for mechanical compatibility.

Q: Are Grayhill 34A4 series parts compatible with the original U41SYCLE?

A: Yes, with noted differences. Grayhill parts maintain 4PDT configuration, 5A current rating, 28V DC, and identical panel cutout and bushing specifications. AC voltage rating is 125V (exceeding the 120V requirement). Electrical life is 40,000 cycles compared to 100,000 cycles in the original. Actuator lengths range from 9.90mm to 10.41mm, requiring panel depth verification.

Q: What is the impact of reduced electrical life in substitute parts?

A: Electrical life ratings indicate switch durability under specified operating conditions. Grayhill and E-Switch parts rated at 40,000 cycles versus the original 100,000 cycles represent a 60% reduction in rated cycle life. Application duty cycle must be evaluated to determine if reduced electrical life is acceptable for the intended use.

Q: Can higher-rated parts like Electroswitch A423S1 be used as direct replacements?

A: Yes. A423S1 series parts exceed all electrical requirements with 6A current rating at 125V AC. These parts are suitable for direct replacement and provide additional design margin for current capacity. Mechanical compatibility is maintained with standard round actuators and identical panel cutout specifications.

Q: What compliance differences exist between substitute parts?

A: U41SYCRE maintains ROHS3 compliance with REACH affected status. Grayhill parts are ROHS3 or RoHS compliant with REACH unaffected status. E-Switch parts are ROHS3 compliant with REACH unaffected status. Electroswitch parts are RoHS compliant with vendor-undefined REACH status. All parts carry EAR99 ECCN classification and identical HTSUS codes.

Q: Are there packaging considerations for substitute parts?

A: U41SYCLE is listed with dash packaging (unspecified). U41SYCRE uses dash packaging. E-Switch parts are supplied in bulk packaging. Grayhill parts use bulk or dash packaging depending on part number. Electroswitch parts use bulk packaging. Procurement specifications should confirm packaging requirements for assembly and inventory management.

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