NKK Switches S732/328 Toggle Switch DPDT 50A 125V - Equivalent & Substitute Parts

Part Overview

The NKK Switches S732/328 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 operates across a temperature range of -30°C to 70°C. The product is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations.

Substiute Parts

S732/328

NKK SwitchesIn Stock: 831S732/328 Datasheet

Current PartRFQ

S822/328

NKK SwitchesIn Stock: 1094S822/328 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the S732/328 is determined by strict alignment with the following critical parameters:

• Circuit configuration must remain DPDT
• Switch function must remain On-On
• Voltage ratings must meet or exceed: 125V AC and 30V DC
• Current rating must support the application requirement
• Mounting type must be Panel Mount
• Actuator type and length must match: Standard Round, 22.00mm
• Termination style must be Screw Terminal
• Panel cutout dimensions must be compatible: Circular 12.50mm Dia
• Bushing thread must match: M12 x 1
• Operating temperature range must encompass -30°C to 70°C
• Electrical life must meet or exceed 25,000 cycles

The NKK Switches S822/328 qualifies as a substitute based on these parameters, with the exception of current rating, which is rated at 30A instead of 50A. This represents a downgrade in current capacity and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The S822/328 is available as an active product from NKK Switches, whereas the S732/328 is obsolete. Both components maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements.

The primary distinction between these components is the current rating: the S732/328 is rated for 50A, while the S822/328 is rated for 30A. Selection between these parts must be based on the actual current requirements of the application. If the application circuit draws current within the 30A range, the S822/328 provides a direct functional substitute with the advantage of active product status and current availability. If the application requires the full 50A capacity of the S732/328, the S822/328 is not suitable as a substitute.

Both components share identical mechanical, electrical, and environmental specifications across all other parameters, including panel mount configuration, DPDT switching logic, voltage ratings, temperature range, and terminal style.

Frequently Asked Questions (FAQ)

Q: Can the S822/328 directly replace the S732/328 in all applications?

A: The S822/328 can replace the S732/328 only in applications where the circuit current does not exceed 30A. The 50A rating of the S732/328 cannot be matched by the S822/328. If your application requires 50A capacity, the S822/328 is not a suitable substitute.

Q: Are the panel cutout dimensions identical between these parts?

A: Yes. Both the S732/328 and S822/328 feature a circular panel cutout of 12.50mm diameter with M12 x 1 bushing thread, ensuring mechanical compatibility in existing panel installations.

Q: What is the difference in actuator specifications?

A: The actuator specifications are identical. Both parts feature a standard round actuator with 22.00mm length, providing the same user interface and mechanical feel.

Q: Do both parts meet current compliance standards?

A: Yes. Both the S732/328 and S822/328 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Why is the S732/328 listed as obsolete?

A: The S732/328 is classified as obsolete by the manufacturer. The S822/328, with its lower current rating, represents the active product line continuation from NKK Switches for this switch family.

Q: Are the electrical life ratings the same?

A: Yes. Both components are rated for 25,000 electrical cycles, providing identical operational longevity under normal switching conditions.

Q: What is the operating temperature range for both parts?

A: Both the S732/328 and S822/328 operate across the identical temperature range of -30°C to 70°C, ensuring compatibility in equivalent thermal environments.