A18EB Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The A18EB is an active production toggle switch manufactured by NKK Switches, configured as a Single Pole Double Throw (SPDT) momentary-off-momentary (Mom-Off-Mom) switch. This through-hole mounted component is rated for 0.4VA at 28V AC/DC operation with a flatted polyamide actuator. The switch is designed for applications requiring reliable switching with process-sealed construction and operates across an industrial temperature range of -30°C to 85°C. Equivalent and substitute parts are identified when electrical ratings, mechanical mounting, circuit configuration, and environmental specifications align within acceptable operational parameters.

Substiute Parts

A18EB

NKK SwitchesIn Stock: 1044A18EB Datasheet

Current PartRFQ

ET05SD1V3BE

C&KIn Stock: 1232ET05SD1V3BE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The ET05SD1V3BE from C&K is identified as a substitute based on the following alignment criteria:

Matching Parameters:

• Circuit configuration: SPDT
• Switch function: Mom-Off-Mom
• Current rating: 0.4VA (AC/DC)
• Mounting type: Through Hole
• Termination style: PC Pin
• Operating temperature range: -30°C to 85°C
• RoHS3 compliance
• Actuator length: 10.16mm (within mechanical tolerance)

Differing Parameters:

• Voltage rating: 20V AC/DC (versus 28V for A18EB)
• Actuator type: Standard Round (versus Flatted)
• Electrical life: 30,000 cycles (versus 50,000 cycles)
• Ingress protection: IP57 rating (versus unspecified for A18EB)
• Bushing thread: Unthreaded (versus Unthreaded, Square)

Substitution is valid for applications where the 20V voltage rating is sufficient and the standard round actuator geometry is acceptable for the mechanical interface.

Parameter Comparison

Engineering Selection Recommendations

Both the A18EB and ET05SD1V3BE are active production components with ROHS3 compliance, ensuring regulatory alignment for current manufacturing standards. Selection between these parts depends on circuit voltage requirements and mechanical interface constraints.

The A18EB is specified for 28V operation and provides 50,000 electrical cycles with a flatted actuator geometry. This configuration is appropriate for applications requiring the higher voltage rating and extended cycle life.

The ET05SD1V3BE operates at 20V and delivers 30,000 electrical cycles with a standard round actuator and IP57 ingress protection. This substitute is suitable for applications where the lower voltage rating is compatible with system design and environmental sealing is beneficial.

Both components share identical current ratings, circuit topology, mounting methodology, and operating temperature specifications, establishing the foundation for substitution eligibility.

Frequently Asked Questions (FAQ)

Q: Can the ET05SD1V3BE replace the A18EB in all applications?

A: Substitution is valid only when the application circuit operates at 20V or lower. If the system requires 28V operation, the ET05SD1V3BE is not suitable. Additionally, the mechanical interface must accommodate the standard round actuator geometry in place of the flatted design.

Q: What is the impact of the 20,000-cycle difference in electrical life?

A: The A18EB provides 50,000 cycles versus 30,000 cycles for the ET05SD1V3BE. For applications with high switching frequency or extended service life requirements, the A18EB offers greater durability. The ET05SD1V3BE is appropriate for moderate-duty applications within its cycle rating.

Q: Are both parts available in the same packaging?

A: Both components are supplied in bulk packaging. Verify inventory availability and lead times with your supplier, as stock levels may vary.

Q: Does the IP57 rating on the ET05SD1V3BE provide an advantage?

A: The IP57 ingress protection on the ET05SD1V3BE offers dust and water resistance. If the application environment requires sealed operation, this substitute provides enhanced environmental protection. The A18EB is process-sealed but does not carry an IP rating specification.

Q: Are there any compliance differences between these parts?

A: Both parts are ROHS3 compliant and carry EAR99 ECCN classification. The ET05SD1V3BE is REACH Affected, while the A18EB is REACH Unaffected. Verify REACH compliance requirements for your specific application and supply chain.

Q: What is the actuator length tolerance consideration?

A: The A18EB actuator length is 10.00mm while the ET05SD1V3BE is 10.16mm. This 0.16mm difference is minimal but should be verified against mechanical panel cutout and actuator engagement specifications in your design.