A18JH-JC Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The A18JH-JC is an active production toggle switch manufactured by NKK Switches, configured as a single-pole double-throw (SPDT) momentary-off-momentary switch with 0.4VA rated capacity at 28V. This through-hole, right-angle mounted component features a standard round actuator with red cap and operates across -30°C to 85°C. Substitute parts are identified when equivalent electrical performance, circuit configuration, and mechanical mounting compatibility can be maintained within specified operational parameters.

Substiute Parts

A18JH-JC

NKK SwitchesIn Stock: 1034A18JH-JC Datasheet

Current PartRFQ

ET05MD1ABE

C&KIn Stock: 1193ET05MD1ABE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A18JH-JC are qualified based on the following critical parameters:

• Circuit Type: SPDT configuration required for functional equivalence
• Switch Function: Mom-Off-Mom operation mandatory
• Current Rating: 0.4VA (AC/DC) minimum requirement
• Voltage Rating: Minimum 28V AC and DC to support primary application voltage
• Mounting: Through-hole, right-angle configuration for mechanical compatibility
• Termination: PC pin termination for PCB integration
• Operating Temperature: -30°C to 85°C range support
• Compliance: ROHS3 compliance required

The ET05MD1ABE from C&K qualifies as a substitute based on matching 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), and RoHS3 compliance. Voltage rating variance (20V vs. 28V) represents a derating condition acceptable for applications operating below 20V nominal.

Parameter Comparison

Engineering Selection Recommendations

Both the A18JH-JC and ET05MD1ABE maintain active production status with ROHS3 compliance and REACH regulatory alignment appropriate for industrial and commercial applications. Selection between these parts depends on application voltage requirements: the A18JH-JC supports 28V operation, while the ET05MD1ABE is rated to 20V maximum. For applications operating at or below 20V nominal, the ET05MD1ABE provides equivalent electrical performance with enhanced ingress protection (IP57). The A18JH-JC is required for applications exceeding 20V operation. Electrical life cycle differences (50,000 vs. 30,000 cycles) should be evaluated against application duty cycle requirements.

Frequently Asked Questions (FAQ)

Q: Can ET05MD1ABE replace A18JH-JC in a 28V circuit?

A: No. The ET05MD1ABE is rated to 20V maximum (AC/DC). Use only in applications operating at or below 20V nominal voltage. The A18JH-JC is required for 28V operation.

Q: Are the actuator dimensions interchangeable?

A: Actuator lengths differ slightly (A18JH-JC: 6.30mm vs. ET05MD1ABE: 6.10mm). Verify panel cutout and mechanical clearance compatibility in your specific application before substitution.

Q: Does the ET05MD1ABE provide better environmental protection?

A: Yes. The ET05MD1ABE includes IP57 ingress protection (dust protected, waterproof), while the A18JH-JC does not specify ingress protection. For applications requiring environmental sealing, the ET05MD1ABE is preferred.

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

A: The A18JH-JC is rated for 50,000 electrical cycles, while the ET05MD1ABE is rated for 30,000 cycles. For high-cycle applications, the A18JH-JC provides extended operational life.

Q: Are both parts RoHS3 compliant?

A: Yes. Both A18JH-JC and ET05MD1ABE are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: Can these parts be used interchangeably in through-hole PCB designs?

A: Both parts feature through-hole, right-angle mounting with PC pin termination. Mechanical compatibility is confirmed for PCB integration. Verify voltage and cycle life requirements before substitution.