NKK Switches S732 Toggle Switch DPDT 50A 125V - Equivalent & Substitute Parts

Part Overview

The NKK Switches S732 is a panel-mount toggle switch with DPDT (Double Pole Double Throw) configuration rated for 50A at 125V AC and 30V DC. This component features a standard round actuator with screw terminal connections and is designed for on-on switching applications. The S732 is classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where equivalent functionality is required.

Substiute Parts

S732

NKK SwitchesIn Stock: 1020S732 Datasheet

Current PartRFQ

S822/CUL

NKK SwitchesIn Stock: 921S822/CUL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S732 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: DPDT
• Switch function: On-On
• Mounting type: Panel Mount
• Actuator type: Standard Round
• Actuator length: 22.00mm
• Termination style: Screw Terminal
• Panel cutout dimensions: Circular - 12.50mm Dia
• Bushing thread: M12 x 1
• Operating temperature range: -10°C to 70°C
• Electrical life: 25,000 Cycles

Allowable Parameter Variations:

• Current rating: May be equal to or greater than 50A
• Voltage rating (AC): Must be equal to or greater than 125V
• Voltage rating (DC): Must be equal to or greater than 30V
• Actuator material composition: May differ while maintaining mechanical and electrical performance
• Product status: Active status preferred for ongoing availability

The NKK Switches S822/CUL meets all mandatory matching parameters and qualifies as a direct substitute, with the exception of current rating (30A versus 50A), which represents a reduction in current capacity.

Parameter Comparison

Engineering Selection Recommendations

The S822/CUL from NKK Switches is the identified substitute for the obsolete S732. Selection of this substitute is based on the following engineering criteria:

Mechanical Compatibility: The S822/CUL maintains identical panel mount dimensions, actuator geometry, and termination configuration, enabling direct mechanical replacement without panel modification or rewiring.

Electrical Compatibility: Both parts share identical DPDT circuit configuration, on-on switching function, 125V AC and 30V DC voltage ratings, and 25,000-cycle electrical life specification.

Regulatory Compliance: Both the S732 and S822/CUL are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Current Rating Consideration: The S822/CUL is rated for 30A maximum current, compared to the S732's 50A rating. Applications requiring current levels between 30A and 50A must evaluate whether the reduced rating is acceptable for the specific circuit design.

Product Availability: The S822/CUL maintains active product status with current manufacturing and inventory availability, addressing the obsolescence of the S732.

Material Variation: The S822/CUL features chrome-plated brass actuator material versus the S732's nickel-plated brass. Both compositions provide equivalent corrosion resistance and mechanical durability within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the S822/CUL directly replace the S732 in existing installations?

A: Mechanical and electrical compatibility is confirmed for all parameters except current rating. The S822/CUL is rated for 30A maximum, while the S732 is rated for 50A. Direct replacement is appropriate only for applications where circuit current does not exceed 30A.

Q: What is the primary difference between these two parts?

A: The primary difference is current rating. The S732 is rated for 50A, while the S822/CUL is rated for 30A. All other electrical and mechanical parameters are identical.

Q: Are the panel cutout dimensions identical?

A: Yes. Both parts require a circular 12.50mm diameter cutout with M12 x 1 bushing thread, enabling direct mechanical fit without panel modification.

Q: Do both parts meet current environmental compliance standards?

A: Yes. Both the S732 and S822/CUL are ROHS3 compliant and REACH unaffected.

Q: What is the difference in actuator material between these parts?

A: The S732 features nickel-plated brass, while the S822/CUL features chrome-plated brass. Both provide equivalent performance within the specified operating temperature range of -10°C to 70°C.

Q: Is the S822/CUL currently available?

A: Yes. The S822/CUL maintains active product status with current manufacturing and inventory availability, unlike the obsolete S732.

Q: Can I use the S822/CUL in a 50A circuit?

A: No. The S822/CUL is rated for maximum 30A. Using this part in circuits exceeding 30A violates the component's electrical specifications and may result in component failure or safety hazards.