ET05SF1ABE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The ET05SF1ABE is a C&K toggle switch with SPDT (Single Pole Double Throw) configuration, rated for 0.4VA at 20V AC/DC. This through-hole, right-angle mounted switch features a momentary-off-momentary (Mom-Off-Mom) function with IP57 ingress protection and an ESD conductive bushing. The part is currently obsolete, making substitute components necessary for new designs and ongoing production requirements.

Substiute Parts

ET05SF1ABE

C&KIn Stock: 1057ET05SF1ABE Datasheet

Current PartRFQ

ET05SD1ABE

C&KIn Stock: 1198ET05SD1ABE Datasheet

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34CMSP41B2M6RT

Grayhill Inc.In Stock: 95534CMSP41B2M6RT Datasheet

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A18AH

NKK SwitchesIn Stock: 1021A18AH Datasheet

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A18AH-GB

NKK SwitchesIn Stock: 821A18AH-GB Datasheet

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A18EH

NKK SwitchesIn Stock: 859A18EH Datasheet

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B18AH

NKK SwitchesIn Stock: 1098B18AH Datasheet

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B18EH

NKK SwitchesIn Stock: 1007B18EH Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ET05SF1ABE is determined by the following critical parameters:

Mandatory Matching Parameters:

• Circuit Configuration: SPDT
• Switch Function: Mom-Off-Mom
• Current Rating: 0.4VA (AC/DC)
• Mounting Type: Through Hole, Right Angle
• Termination Style: PC Pin
• Operating Temperature Range: -30°C to 85°C

Voltage Compatibility Criteria: Substitute parts must meet or exceed the 20V AC/DC rating of the main part. Parts rated at 28V AC/DC are acceptable as they provide higher voltage margin.

Acceptable Variations:

• Actuator length within ±0.76mm tolerance (9.40mm to 10.16mm range)
• Actuator type variations (Standard Round, Flatted, Standard Round with Cap)
• Electrical life rated at 30,000 cycles or higher
• Bushing thread configuration (Unthreaded or Unthreaded, Square)
• Ingress protection rating (IP57 or unspecified)
• Actuator material composition (Brass Chrome Plated, Brass Nickel Plated, Polyamide Nylon Glass Filled)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute - Same Manufacturer (C&K): ET05SD1ABE is the direct functional equivalent with identical electrical specifications and actuator dimensions. This part carries Active product status and ROHS3 compliance, making it the preferred choice for direct replacement in new designs. The transition from ESD conductive bushing to epoxy sealed terminals represents an enhancement in environmental protection.

Cross-Manufacturer Alternatives: The Grayhill Inc. 34CMSP41B2M6RT maintains identical electrical ratings and mounting configuration. Actuator length is 0.76mm shorter (9.40mm vs. 10.16mm), which may require panel cutout verification. This part is RoHS Compliant and carries Active status.

Higher Voltage Rating Substitutes (NKK Switches A and B Series): Parts A18AH, A18AH-GB, A18EH, B18AH, and B18EH are rated at 28V AC/DC, providing 40% voltage margin above the original 20V specification. All feature 50,000-cycle electrical life, exceeding the original 30,000-cycle rating. These parts carry ROHS3 compliance and Active product status. Selection among these variants depends on actuator type preference (Standard Round, Flatted, or capped) and bushing thread configuration (Unthreaded or Unthreaded, Square).

Compliance Considerations: All substitute parts meet or exceed RoHS requirements. NKK Switches variants carry ROHS3 certification. The ET05SD1ABE shows REACH Affected status, while other substitutes show REACH Unaffected status. Verify REACH compliance requirements for your specific application.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with 28V rating in a 20V circuit? A: Yes. The 28V-rated parts (NKK Switches A and B series) are fully compatible with 20V circuits. Higher voltage ratings provide additional safety margin and do not affect operation at lower voltages.

Q: What is the difference between the C&K ET05SF1ABE and ET05SD1ABE? A: Both parts share identical electrical specifications (0.4VA, 20V, SPDT, Mom-Off-Mom) and actuator dimensions (10.16mm). The primary difference is the bushing feature: ET05SF1ABE includes an ESD conductive bushing, while ET05SD1ABE features epoxy sealed terminals. ET05SD1ABE is Active status, making it the recommended replacement for the obsolete ET05SF1ABE.

Q: Are there actuator type differences among the NKK Switches substitutes? A: Yes. A18AH and B18AH feature Standard Round actuators. A18AH-GB includes a Standard Round actuator with a white cap. A18EH and B18EH feature Flatted actuators. Select based on your panel interface requirements and operator preference.

Q: Does the 9.40mm actuator length of the Grayhill part affect compatibility? A: The 0.76mm difference may require panel cutout verification. If your design specifies a 10.16mm actuator length, confirm that the shorter Grayhill actuator provides adequate engagement with your panel interface before implementation.

Q: What is the difference between NKK Switches A series and B series? A: Both series share identical electrical specifications and operating temperature ranges. The primary difference is actuator material: A series uses Polyamide (PA) Nylon Glass Filled, while B series uses Brass Nickel Plated. B series offers superior durability and conductivity characteristics.

Q: Are all substitute parts available in the same packaging as the original? A: Packaging varies. ET05SF1ABE was supplied in standard packaging. ET05SD1ABE is available in Bulk. Grayhill 34CMSP41B2M6RT packaging is unspecified. NKK Switches A18AH and B18AH/B18EH are supplied in Trays, while A18AH-GB and A18EH are supplied in Bulk. Confirm packaging requirements with your procurement process.