A103SYCB Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The A103SYCB is a toggle switch manufactured by TE Connectivity ALCOSWITCH Switches, configured as a Single Pole Double Throw (SPDT) panel mount switch with On-Off-On functionality. This component is rated for 0.4VA at 20V AC/DC operation with a standard round actuator and PC pin termination. The A103SYCB is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs.

Substiute Parts

A103SYCB

TE Connectivity ALCOSWITCH SwitchesIn Stock: 906A103SYCB Datasheet

Current PartRFQ

1-1825137-5

TE Connectivity ALCOSWITCH SwitchesIn Stock: 16081-1825137-5 Datasheet

DirectRFQ

7103MHCGE

C&KIn Stock: 10277103MHCGE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A103SYCB are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is structured as follows:

Direct Equivalent Substitutes are parts that maintain identical or superior electrical ratings, mechanical form factors, and circuit configurations while offering improved product status or compliance certifications.

Similar Function Substitutes are parts that share the same circuit topology (SPDT), mounting methodology (panel mount), and physical interface dimensions but operate at different electrical ratings. These parts are suitable for applications where the original electrical specifications can be exceeded without design constraint.

Key Parameters for Substitution Eligibility:

• Circuit Configuration: SPDT (mandatory match)
• Switch Function: On-Off-On (mandatory match)
• Mounting Type: Panel Mount (mandatory match)
• Termination Style: PC Pin (mandatory match)
• Panel Cutout Dimensions: Circular - 6.35mm Dia (mandatory match)
• Bushing Thread: 1/4-40 (mandatory match)
• Current Rating: Equal to or greater than 0.4VA
• Voltage Rating - AC: Equal to or greater than 20V
• Voltage Rating - DC: Equal to or greater than 20V
• Actuator Type: Standard Round (preferred match)

Parameter Comparison

Engineering Selection Recommendations

1-1825137-5 (Direct Equivalent Substitute)

The 1-1825137-5 is the primary substitute for the A103SYCB. Both parts are manufactured by TE Connectivity ALCOSWITCH Switches and share identical electrical ratings (0.4VA at 20V AC/DC), circuit configuration (SPDT), and mechanical interfaces (panel mount with 1/4-40 bushing thread and 6.35mm circular cutout). The 1-1825137-5 maintains the same actuator length (10.41mm) and termination style (PC Pin). The substitute part offers an extended operating temperature range (-30°C to 85°C versus -20°C to 85°C) and is classified as Active product status. The 1-1825137-5 is ROHS3 compliant and REACH affected, providing improved regulatory compliance compared to the obsolete A103SYCB. This part is suitable for direct replacement in applications requiring equivalent electrical and mechanical specifications.

7103MHCGE (Similar Function Substitute)

The 7103MHCGE manufactured by C&K is a similar function substitute suitable for applications where higher electrical ratings are acceptable. This part maintains the same circuit configuration (SPDT), switch function (On-Off-On), and mechanical interfaces (panel mount with 1/4-40 bushing thread and 6.35mm circular cutout). The 7103MHCGE is rated for 5A at 120V AC and 28V DC, providing significantly higher current and voltage capacity than the A103SYCB. The actuator length is shorter (5.08mm versus 10.41mm), which may affect panel aesthetics and operator feel. The 7103MHCGE offers extended electrical life (40,000 cycles versus 6,000 cycles) and is ROHS3 compliant and REACH affected. This part is applicable for designs where the original 0.4VA specification represents a design margin and higher-rated components are acceptable.

Frequently Asked Questions (FAQ)

Q: Can the 1-1825137-5 be used as a direct replacement for the A103SYCB?

A: Yes. The 1-1825137-5 maintains identical electrical ratings (0.4VA at 20V AC/DC), circuit configuration (SPDT), and mechanical interfaces (panel mount, 1/4-40 bushing, 6.35mm cutout, PC pin termination). Both parts share the same actuator length (10.41mm). The 1-1825137-5 is the recommended substitute due to active product status and improved regulatory compliance.

Q: What are the differences between the 1-1825137-5 and 7103MHCGE?

A: The 1-1825137-5 is a direct electrical equivalent with identical 0.4VA and 20V ratings. The 7103MHCGE is a higher-rated alternative with 5A and 120V AC capability. The 7103MHCGE has a shorter actuator (5.08mm versus 10.41mm) and higher electrical life (40,000 cycles versus 6,000 cycles). Both parts share identical mechanical interfaces and circuit configuration.

Q: Can the 7103MHCGE be used in place of the A103SYCB?

A: The 7103MHCGE is mechanically and functionally compatible with the A103SYCB for panel mount applications. However, the shorter actuator length (5.08mm versus 10.41mm) may affect panel aesthetics and operator feel. The higher electrical ratings (5A at 120V AC) exceed the original specification and are suitable only if the application design permits higher-rated components.

Q: What is the significance of the actuator length difference between the A103SYCB and 7103MHCGE?

A: The A103SYCB has an actuator length of 10.41mm, while the 7103MHCGE is 5.08mm. This difference affects the physical appearance and tactile feedback of the switch when mounted in a panel. The shorter actuator of the 7103MHCGE may require panel design modifications if consistent operator feel is required across product generations.

Q: Are there compliance differences between the substitute parts?

A: Yes. The A103SYCB is RoHS non-compliant and REACH unaffected. The 1-1825137-5 and 7103MHCGE are both ROHS3 compliant and REACH affected. For applications subject to RoHS or REACH regulations, the substitute parts provide improved compliance status.

Q: What is the electrical life difference between these parts?

A: The A103SYCB and 1-1825137-5 are rated for 6,000 electrical cycles. The 7103MHCGE is rated for 40,000 electrical cycles, providing extended operational life. This difference is relevant for high-cycle applications where switch durability is a design consideration.

Q: Can these parts be used interchangeably in existing designs?

A: The 1-1825137-5 can be used interchangeably with the A103SYCB due to identical electrical and mechanical specifications. The 7103MHCGE requires design review due to the shorter actuator length and higher electrical ratings, even though mechanical interfaces are compatible.