S2B Toggle Switch SPDT 5A 125V Equivalent & Substitute Parts

Part Overview

The NKK Switches S2B is a panel-mount toggle switch with SPDT (Single Pole Double Throw) configuration, rated for 5A at 125V AC and 30V DC. This switch features a standard round actuator with solder lug termination and a circular 12.50mm panel cutout. The product is classified as obsolete, making identification of compatible alternatives essential for system maintenance, repair, and redesign applications where continued supply cannot be guaranteed.

Substiute Parts

S2B

NKK SwitchesIn Stock: 1019S2B Datasheet

Current PartRFQ

S2A

Diotec SemiconductorIn Stock: 7018S2A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The provided substitute part S2A (Diotec Semiconductor) is a diode component classified under Diodes, Rectifiers category. This part cannot serve as a functional equivalent to the S2B toggle switch due to fundamental differences in component type and electrical function:

• S2B is a mechanical switching device (SPDT toggle switch) designed for circuit control and signal routing
• S2A is a semiconductor diode designed for rectification and signal conditioning

These components operate on different physical principles and serve entirely different circuit functions. No substitution relationship exists between these parts based on the provided specifications.

Parameter Comparison

Engineering Selection Recommendations

Based on the provided data, the S2A cannot be selected as a substitute for the S2B. The component categories, electrical functions, and physical form factors are fundamentally incompatible.

For applications requiring an S2B replacement, alternative sources should be evaluated based on the following critical parameters:

• SPDT circuit configuration
• 5A current rating at 125V AC / 30V DC
• Panel mount with M12 x 1 bushing thread
• Solder lug termination
• 12.50mm circular panel cutout
• Operating temperature range -10°C ~ 70°C

The S2B's obsolete status requires proactive component qualification and supply chain planning to ensure continued system availability.

Frequently Asked Questions (FAQ)

Q: Can the S2A diode replace the S2B toggle switch?

A: No. The S2A is a semiconductor diode used for rectification, while the S2B is a mechanical toggle switch used for circuit control. These are different component categories with different electrical functions and cannot be substituted for one another.

Q: What makes a valid substitute for the S2B?

A: A valid substitute must match the SPDT circuit configuration, support 5A current at 125V AC and 30V DC, feature panel mount construction with M12 x 1 bushing thread, use solder lug termination, and accommodate a 12.50mm circular panel cutout.

Q: Why is the S2B listed as obsolete?

A: The S2B is classified as obsolete by NKK Switches, indicating it is no longer in active production. This status necessitates identification of compatible alternatives for maintenance and redesign applications.

Q: Are there compliance differences between the S2B and S2A?

A: Yes. The S2B is REACH Unaffected, while the S2A has REACH information available upon request. These represent different regulatory compliance profiles and further confirm these parts serve different applications.

Q: What is the electrical life specification for the S2B?

A: The S2B is rated for 25,000 electrical cycles, defining its operational durability under normal switching conditions.