C&K 7103SY9CLE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7103SY9CLE is a toggle switch with Single Pole Double Throw (SPDT) configuration rated for 5A at 120V AC and 28V DC. This component features a through-hole mounting design with PC pin termination and epoxy sealed terminals. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

7103SY9CLE

C&KIn Stock: 11697103SY9CLE Datasheet

Current PartRFQ

7103SY9CRE

C&KIn Stock: 8617103SY9CRE Datasheet

DirectRFQ

34ASP31B2M2RT

Grayhill Inc.In Stock: 111634ASP31B2M2RT Datasheet

SimilarRFQ

34ASP33B4M2RT

Grayhill Inc.In Stock: 107134ASP33B4M2RT Datasheet

SimilarRFQ

A121S1D9CQ

ElectroswitchIn Stock: 1242A121S1D9CQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7103SY9CLE is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPDT
• Mounting type: Through Hole
• Termination style: PC Pin
• Actuator type: Standard Round
• Bushing thread: Unthreaded

Electrical Performance Criteria:

• Current rating must meet or exceed 5A (AC/DC)
• Voltage rating - AC must meet or exceed 120V
• Voltage rating - DC must meet or exceed 28V
• Operating temperature range must encompass -30°C to 85°C

Mechanical Compatibility Criteria:

• Actuator length tolerance within application requirements
• Actuator material: Brass, Chrome Plated

Substitute parts are classified into two categories: direct equivalents (same manufacturer, active status) and similar alternatives (different manufacturers, electrical or mechanical variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent - Recommended for Obsolete Part Replacement:

The C&K 7103SY9CRE is the primary substitute for the 7103SY9CLE. Both parts share identical electrical ratings (5A at 120V AC / 28V DC), mechanical configuration, and operating temperature range. The 7103SY9CRE is active in production status, ensuring long-term availability. Both parts are RoHS compliant and carry the same ECCN and HTSUS classifications. This part requires no design modification and provides direct functional equivalence.

Similar Alternatives - Application-Dependent Substitution:

The Grayhill Inc. 34ASP31B2M2RT and 34ASP33B4M2RT are not suitable substitutes for the 7103SY9CLE due to insufficient electrical ratings. Both parts are rated for 0.4VA at 20V AC/DC, which falls below the 5A at 120V AC requirement of the main part. These parts are appropriate only for low-power applications with reduced voltage and current demands.

The Electroswitch A121S1D9CQ provides higher electrical performance (6A at 125V AC / 28V DC) and extended electrical life (60,000 cycles versus 40,000 cycles). However, the switch function differs: the A121S1D9CQ is configured as On-On rather than On-Off-On. This functional difference may affect circuit behavior in applications requiring a center-off position. The A121S1D9CQ is suitable only when the On-On configuration aligns with application requirements.

Frequently Asked Questions (FAQ)

Q: Can the 7103SY9CRE directly replace the 7103SY9CLE without design changes?

A: Yes. The 7103SY9CRE is a direct equivalent with identical electrical ratings, mechanical configuration, and operating specifications. No circuit or PCB modifications are required.

Q: Why are the Grayhill 34ASP series parts listed as substitutes if they have lower electrical ratings?

A: The 34ASP series parts are listed based on the original part's substitute field data. However, their 0.4VA rating at 20V AC/DC does not meet the 5A at 120V AC requirement. These parts are suitable only for applications with significantly reduced power demands.

Q: Is the Electroswitch A121S1D9CQ a suitable replacement?

A: The A121S1D9CQ meets the electrical performance requirements (6A at 125V AC / 28V DC) and exceeds the electrical life specification. However, its On-On switch function differs from the On-Off-On configuration of the 7103SY9CLE. Substitution is valid only if the application does not require a center-off position.

Q: What are the key parameters that determine substitution compatibility?

A: Circuit configuration (SPDT), mounting type (Through Hole), termination style (PC Pin), current rating (minimum 5A AC/DC), voltage rating (minimum 120V AC / 28V DC), and operating temperature range (-30°C to 85°C minimum) are the primary criteria. Actuator type, material, and length must also match mechanical constraints.

Q: Are all substitute parts RoHS compliant?

A: The 7103SY9CRE, 34ASP31B2M2RT, and 34ASP33B4M2RT are ROHS3 compliant. The A121S1D9CQ is RoHS compliant. All parts meet applicable environmental regulations.

Q: What is the difference between the two Grayhill parts (34ASP31B2M2RT and 34ASP33B4M2RT)?

A: Both parts have identical electrical specifications (0.4VA at 20V AC/DC). The primary difference is actuator length: 34ASP31B2M2RT has a 10.41mm actuator, while 34ASP33B4M2RT has a 13.97mm actuator. Selection depends on panel thickness and mechanical clearance requirements.