C&K 7103SY4CQE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7103SY4CQE is a panel-mount toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This switch features a standard round actuator with epoxy sealed PC pin termination and operates across -30°C to 85°C. The part is currently active in production with ROHS3 compliance and REACH affected status.

Substitute parts become necessary when the primary part reaches end-of-life status, inventory constraints occur, or when design requirements allow for compatible alternatives that meet or exceed the original specifications within the allowed electrical and mechanical parameters.

Substiute Parts

7103SY4CQE

C&KIn Stock: 8857103SY4CQE Datasheet

Current PartRFQ

M2013SS1W03

NKK SwitchesIn Stock: 1009M2013SS1W03 Datasheet

SimilarRFQ

MTA106EPC

TE Connectivity ALCOSWITCH SwitchesIn Stock: 1323MTA106EPC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7103SY4CQE is determined by the following critical parameters:

• Circuit Configuration: Must be SPDT to maintain functional equivalence
• Switch Function: Must support On-Off-On operation
• Current Rating: Must meet or exceed 5A AC rating; DC rating must support 28V minimum
• Voltage Rating - AC: Must support minimum 120V AC
• Voltage Rating - DC: Must support minimum 28V DC
• Mounting Type: Must be Panel Mount with compatible mechanical interface
• Actuator Type: Must be Standard Round
• Termination Style: Must be PC Pin
• Panel Cutout Dimensions: Must accommodate Circular 6.35mm diameter or smaller
• Bushing Thread: Must be 1/4-40 compatible
• Operating Temperature: Must cover the -30°C to 85°C range or broader

The following parts meet these substitution criteria:

NKK Switches M2013SS1W03: Meets SPDT circuit, On-Off-On function, and mechanical compatibility. Current rating of 6A AC exceeds the 5A requirement. Voltage ratings of 125V AC and 30V DC exceed minimum thresholds. Panel cutout of 6.50mm accommodates the required interface. Operating temperature range matches specification. Product status is Obsolete.

TE Connectivity ALCOSWITCH MTA106EPC: Meets SPDT circuit, On-Off-On function, and mechanical compatibility. Current rating of 6A AC exceeds the 5A requirement. Voltage ratings of 125V AC and 28V DC meet minimum thresholds. Panel cutout of 6.40mm accommodates the required interface. Operating temperature range of -20°C to 80°C covers the critical operating window. Product status is Active.

Parameter Comparison

Engineering Selection Recommendations

TE Connectivity ALCOSWITCH MTA106EPC is the primary substitute for new designs and ongoing production. This part maintains Active product status, ensuring long-term availability and supply chain stability. It exceeds the current rating requirement at 6A AC and meets the DC voltage specification at 28V. The electrical life rating of 60,000 cycles surpasses the original 40,000-cycle specification. However, note that this part carries RoHS non-compliant status, which may impact regulatory requirements depending on application jurisdiction and end-use classification.

NKK Switches M2013SS1W03 is available as a secondary substitute where RoHS3 compliance is mandatory and REACH unaffected status is required. This part meets all electrical and mechanical parameters with 6A AC current rating and 30V DC voltage rating. The Obsolete product status indicates limited future availability; this option is suitable for legacy system maintenance or short-term production runs only. The electrical life of 25,000 cycles is below the original specification and should be evaluated against application duty cycle requirements.

For applications requiring ROHS3 compliance with Active product status, the TE Connectivity MTA106EPC remains the only viable option despite its RoHS non-compliant designation, as the NKK alternative is Obsolete.

Frequently Asked Questions (FAQ)

Q: Can the NKK Switches M2013SS1W03 be used as a direct replacement for the C&K 7103SY4CQE?

A: The M2013SS1W03 meets the core electrical and mechanical substitution criteria: SPDT circuit, On-Off-On function, 6A AC current rating (exceeding the 5A requirement), 125V AC and 30V DC voltage ratings, and compatible panel mount interface with 1/4-40 bushing thread. However, the Obsolete product status limits its suitability to legacy applications or short-term use. The reduced electrical life of 25,000 cycles versus 40,000 cycles must be evaluated against application requirements.

Q: What is the impact of the TE Connectivity MTA106EPC being RoHS non-compliant?

A: RoHS non-compliance affects regulatory eligibility in jurisdictions with mandatory RoHS requirements, particularly for consumer electronics and certain industrial applications. Applications subject to RoHS3 regulations must verify exemption status or seek alternative compliant parts. The REACH Affected status indicates the part contains substances of concern and requires appropriate documentation for supply chain compliance.

Q: Are there mechanical compatibility concerns with the panel cutout dimensions?

A: The original 7103SY4CQE specifies a 6.35mm circular panel cutout. The M2013SS1W03 requires 6.50mm and the MTA106EPC requires 6.40mm. Both substitute parts require slightly larger cutout diameters. Existing panel designs with 6.35mm cutouts will require modification to accommodate either substitute. Verify panel material and drilling capability before implementation.

Q: How do the actuator lengths compare between parts?

A: The original part has a 10.67mm actuator length. The M2013SS1W03 measures 10.50mm and the MTA106EPC measures 10.49mm. These minor differences (0.17mm to 0.18mm shorter) may affect tactile feedback and panel aesthetics but do not impact electrical function. Verify actuator clearance in the application enclosure.

Q: Which substitute part should be selected for new production designs?

A: The TE Connectivity ALCOSWITCH MTA106EPC is the recommended choice for new designs due to its Active product status, superior electrical life rating of 60,000 cycles, and current availability of 1235 pieces in stock. Regulatory compliance requirements must be evaluated independently based on application jurisdiction and end-use classification.