NKK Switches A19HH Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The NKK Switches A19HH is an active-status toggle switch featuring SPDT (Single Pole Double Throw) circuitry with 0.4VA rated capacity at 28V. This through-hole, right-angle mounted component is designed for On-Off-Mom switching applications and is sealed for environmental protection. Substitute parts are identified when equivalent electrical ratings, circuit configurations, and mechanical mounting specifications align within acceptable operational parameters.

Substiute Parts

A19HH

NKK SwitchesIn Stock: 1017A19HH Datasheet

Current PartRFQ

34DWMSP52B4M6RT

Grayhill Inc.In Stock: 113834DWMSP52B4M6RT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A19HH is determined by the following critical parameters:

• Circuit Type: Must be SPDT configuration
• Current Rating: Must support minimum 0.4VA (AC/DC)
• Voltage Rating: Must support minimum 28V (AC and DC)
• Mounting Configuration: Must be through-hole with right-angle orientation
• Switch Function: Must support On-Off-Mom operation
• Termination: Must use PC Pin termination
• Operating Temperature: Must cover -30°C to 85°C range
• Compliance: Must maintain ROHS3 compliance status

The Grayhill Inc. 34DWMSP52B4M6RT meets the core electrical and mechanical requirements for substitution, with the exception of voltage rating (20V vs. 28V specified), which represents a design constraint requiring engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Both components maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for equivalent component selection. The A19HH and 34DWMSP52B4M6RT share identical circuit configuration, current rating, switch function, termination style, and operating temperature specifications. Selection between these components depends on application voltage requirements: the A19HH operates at 28V (AC/DC), while the 34DWMSP52B4M6RT operates at 20V (AC/DC). The Grayhill component provides enhanced ingress protection (IP67) and sealed terminal construction, whereas the NKK component offers extended electrical life (50,000 cycles vs. 30,000 cycles). Active product status confirms ongoing manufacturer support for both options.

Frequently Asked Questions (FAQ)

Q: Can the Grayhill 34DWMSP52B4M6RT directly replace the NKK A19HH in all applications?

A: Direct substitution requires voltage compatibility verification. The 34DWMSP52B4M6RT is rated for 20V maximum, while the A19HH is rated for 28V. Applications operating at voltages exceeding 20V require the A19HH or equivalent 28V-rated component.

Q: What are the primary differences between these toggle switches?

A: Both components share SPDT circuit configuration, 0.4VA current rating, On-Off-Mom function, and PC Pin termination. Differences include voltage rating (28V vs. 20V), electrical life (50,000 vs. 30,000 cycles), actuator design (flatted vs. standard round), and ingress protection (unspecified vs. IP67).

Q: Are both components available in bulk packaging?

A: Yes. The A19HH is available with 993 pieces in stock, and the 34DWMSP52B4M6RT is available with 1,115 pieces in stock, both in bulk packaging.

Q: Do these components meet environmental compliance standards?

A: Both components are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component use.

Q: What is the significance of the IP67 rating on the Grayhill component?

A: The IP67 ingress protection rating on the 34DWMSP52B4M6RT indicates dust-tight and waterproof sealing. This specification is not provided for the A19HH, making the Grayhill component suitable for applications requiring enhanced environmental protection.