A12HP Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The A12HP is an NKK Switches toggle switch featuring SPDT (Single Pole Double Throw) circuitry with On-On switching function. Rated for 0.4VA at 28V AC/DC, this through-hole mounted component is designed for applications requiring reliable switching in industrial and commercial environments. The part maintains Active product status with 708 units in current inventory. Alternative models may be required due to design constraints, application-specific requirements, or supply chain considerations.

Substiute Parts

A12HP

NKK SwitchesIn Stock: 768A12HP Datasheet

Current PartRFQ

ET01MD1CBE

C&KIn Stock: 3621ET01MD1CBE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The ET01MD1CBE from C&K qualifies as a functional substitute based on the following critical parameters:

Matching Parameters:

• Circuit configuration: SPDT
• Switch function: On-On
• Current rating: 0.4VA (AC/DC)
• Mounting type: Through Hole
• Termination style: PC Pin
• Operating temperature range: -30°C to 85°C
• RoHS3 compliance
• Product status: Active

Voltage Consideration: The ET01MD1CBE operates at 20V AC/DC, which is lower than the A12HP's 28V rating. This part is suitable for applications operating at or below 20V. Applications requiring the full 28V rating of the A12HP must verify voltage compatibility before substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the A12HP and ET01MD1CBE maintain Active product status and ROHS3 compliance, supporting long-term availability and regulatory requirements. The ET01MD1CBE offers enhanced ingress protection (IP57) and extended electrical life (60,000 cycles versus 50,000 cycles), making it suitable for applications in harsh or high-cycle environments where moisture resistance is required.

Selection between these parts depends on voltage requirements. The A12HP supports the full 28V specification, while the ET01MD1CBE is limited to 20V operation. Physical differences in actuator design (flatted versus standard round) and length (6.30mm versus 6.10mm) may affect panel mounting and user interface considerations.

Frequently Asked Questions (FAQ)

Q: Can ET01MD1CBE replace A12HP in all applications? A: No. The ET01MD1CBE is rated for 20V maximum, while the A12HP supports 28V. Substitution is valid only for applications operating at 20V or below.

Q: What are the key compatibility criteria for these switches? A: Both parts share SPDT circuit configuration, On-On switching function, 0.4VA current rating, through-hole mounting, PC pin termination, and identical operating temperature range. These parameters define functional equivalence.

Q: Does the ET01MD1CBE's IP57 rating affect compatibility? A: The IP57 ingress protection is an additional feature of the ET01MD1CBE. It does not prevent substitution but indicates enhanced environmental sealing suitable for applications exposed to dust or moisture.

Q: Are there physical mounting differences? A: Yes. The A12HP features a flatted actuator at 6.30mm length, while the ET01MD1CBE has a standard round actuator at 6.10mm length. Panel cutout dimensions and actuator engagement may differ, requiring mechanical verification.

Q: What is the difference in electrical life between these parts? A: The A12HP is rated for 50,000 cycles, while the ET01MD1CBE is rated for 60,000 cycles. Both ratings support typical industrial switching applications.

Q: Are both parts RoHS compliant? A: Yes. Both the A12HP and ET01MD1CBE are ROHS3 compliant, meeting current environmental and regulatory standards.