NKK Switches A29JH Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The NKK Switches A29JH is an active-status toggle switch featuring DPDT (Double Pole Double Throw) circuitry with 0.4VA current rating at 28V. This through-hole, right-angle mounted component is designed for On-Off-Mom switching applications and is sealed for environmental protection. Alternative equivalent parts may be required due to inventory constraints, application-specific requirements, or regional availability considerations.

Substiute Parts

A29JH

NKK SwitchesIn Stock: 933A29JH Datasheet

Current PartRFQ

34DWMDP52B4M6RT

Grayhill Inc.In Stock: 81734DWMDP52B4M6RT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A29JH is determined by the following critical parameters:

• Circuit Configuration: Must be DPDT to maintain functional equivalence
• Current Rating: Must support minimum 0.4VA (AC/DC)
• Voltage Rating: Must support minimum 28V (AC and DC)
• Mounting Type: Must be Through Hole, Right Angle to ensure PCB compatibility
• Switch Function: Must support On-Off-Mom operation
• Operating Temperature: Must cover -30°C to 85°C range
• Compliance: Must maintain ROHS3 and REACH compliance status

The Grayhill Inc. 34DWMDP52B4M6RT meets the core functional requirements of DPDT circuit configuration, 0.4VA current rating, and through-hole right-angle mounting. However, voltage rating differences and electrical life variations exist and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

NKK Switches A29JH is the primary specification component with active product status and full compliance certifications (ROHS3, REACH Unaffected). This part is suitable for applications requiring 28V operation and 50,000-cycle electrical life.

Grayhill Inc. 34DWMDP52B4M6RT is functionally equivalent for DPDT switching applications with identical current rating and mounting configuration. This substitute maintains ROHS3 and REACH compliance. Selection of this substitute requires confirmation that the application voltage requirement does not exceed 20V (AC/DC), as this represents a voltage derating from the primary specification. The reduced electrical life rating of 30,000 cycles versus 50,000 cycles must be evaluated against application duty cycle requirements.

Both parts maintain identical operating temperature ranges and termination styles, supporting direct PCB integration compatibility.

Frequently Asked Questions (FAQ)

Q: Can the Grayhill 34DWMDP52B4M6RT be used in place of the NKK A29JH in all applications?

A: No. The Grayhill substitute has a maximum voltage rating of 20V (AC/DC) compared to the NKK part's 28V rating. Use the Grayhill part only in applications where circuit voltage does not exceed 20V.

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

A: The NKK A29JH is rated for 50,000 electrical cycles, while the Grayhill 34DWMDP52B4M6RT is rated for 30,000 cycles. Applications with high switching frequency or extended operational life requirements should use the NKK part.

Q: Are both parts compatible with the same PCB footprint?

A: Yes. Both parts feature Through Hole, Right Angle mounting with PC Pin termination style, supporting identical PCB integration.

Q: Do both parts meet environmental compliance requirements?

A: Yes. Both the NKK A29JH and Grayhill 34DWMDP52B4M6RT are ROHS3 Compliant and REACH Unaffected.

Q: What is the actuator length difference between these parts?

A: The NKK A29JH has an actuator length of 6.30mm, while the Grayhill 34DWMDP52B4M6RT has an actuator length of 6.10mm. This 0.20mm difference may affect panel clearance in space-constrained applications.

Q: Are there sealing differences between these parts?

A: Yes. The NKK A29JH features Process Sealed design, while the Grayhill 34DWMDP52B4M6RT features Epoxy Sealed Terminals with IP67 rating (Dust Tight, Waterproof). The Grayhill part offers enhanced environmental protection.