C&K 7103SYA3LE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7103SYA3LE is a toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This component features panel mount, right angle installation with a circular 6.35mm diameter cutout and 1/4-40 bushing thread. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing procurement and system maintenance.

Substiute Parts

7103SYA3LE

C&KIn Stock: 9957103SYA3LE Datasheet

Current PartRFQ

7103SYA3RE

C&KIn Stock: 11437103SYA3RE Datasheet

DirectRFQ

A121S1YAQ

ElectroswitchIn Stock: 902A121S1YAQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7103SYA3LE are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Circuit configuration (SPDT)
• Mounting type (Panel Mount, Right Angle)
• Panel cutout dimensions (Circular - 6.35mm Dia)
• Bushing thread specification (1/4-40)
• Termination style (PC Pin)
• Operating temperature range capability
• Current and voltage ratings (equal or greater)

Substitution Categories:

Direct Manufacturer Equivalent: Parts from the same manufacturer (C&K) within the same series that maintain identical mechanical and electrical specifications with active product status.

Similar Cross-Manufacturer Substitute: Parts from alternative manufacturers that meet or exceed the electrical and mechanical requirements, with compatible mounting and termination characteristics.

Parameter Comparison

Engineering Selection Recommendations

7103SYA3RE (C&K Direct Equivalent): This part is the primary recommended substitute for the obsolete 7103SYA3LE. It maintains identical electrical ratings (5A, 120V AC, 28V DC), mechanical specifications (panel mount, right angle, 6.35mm cutout, 1/4-40 bushing), and termination style (PC Pin). The part carries active product status and RoHS compliance certification. The REACH Affected status requires verification against specific application regulatory requirements.

A121S1YAQ (Electroswitch Cross-Manufacturer Substitute): This part provides functional substitution with enhanced electrical performance (6A current rating, 125V AC rating) and extended operating temperature range (-30°C to 90°C). Electrical life is rated at 60,000 cycles versus 40,000 cycles for the original part. The switch function differs (On-On versus On-Off-On), requiring functional validation against circuit design requirements. Panel cutout dimensions are not specified; mechanical compatibility must be confirmed prior to implementation. RoHS compliance is confirmed; REACH status is vendor-undefined and requires clarification.

Frequently Asked Questions (FAQ)

Q: Can the 7103SYA3RE directly replace the 7103SYA3LE without circuit modification?

A: Yes. The 7103SYA3RE maintains identical electrical ratings, circuit configuration (SPDT), mechanical mounting specifications, and termination style. No circuit modification is required for direct substitution.

Q: What is the primary difference between the 7103SYA3LE and A121S1YAQ?

A: The A121S1YAQ provides higher current capacity (6A versus 5A) and higher AC voltage rating (125V versus 120V). The switch function differs: the A121S1YAQ is configured as On-On, while the original is On-Off-On. This functional difference requires circuit design validation.

Q: Is the A121S1YAQ mechanically compatible with the original panel cutout?

A: The A121S1YAQ panel cutout dimensions are not specified in available documentation. Mechanical compatibility must be verified before implementation, particularly regarding the 6.35mm diameter circular cutout requirement.

Q: What compliance certifications apply to each substitute part?

A: The 7103SYA3RE carries RoHS compliance and REACH Affected status. The A121S1YAQ carries RoHS compliance; REACH status is vendor-undefined and requires confirmation from the manufacturer.

Q: Which substitute part is recommended for new designs?

A: The 7103SYA3RE is recommended as the primary substitute due to identical specifications and active product status. The A121S1YAQ may be considered if enhanced electrical performance and extended temperature range are required, contingent upon functional validation of the On-On switch configuration and mechanical compatibility confirmation.