SB25 Equivalent & Substitute Parts

Part Overview

The SB25 is a pushbutton switch manufactured by NKK Switches, classified as a DPDT (Double Pole Double Throw) standard panel mount switch with rear termination. It is rated for 15A at 125V AC and features a round black button actuator with solder lug termination. The product is currently obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing in legacy applications.

Substiute Parts

SB25

NKK SwitchesIn Stock: 706SB25 Datasheet

Current PartRFQ

JPL26B

NKK SwitchesIn Stock: 1363JPL26B Datasheet

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JPL26P

NKK SwitchesIn Stock: 940JPL26P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SB25 are identified based on the following critical parameters that determine functional compatibility:

• Voltage Rating: Substitute parts must maintain 125V AC rating to ensure safe operation in the original circuit
• Current Rating: Substitute parts rated at 16A AC meet or exceed the original 15A requirement
• Termination Style: All substitutes utilize solder lug termination, maintaining electrical connection compatibility
• Operating Temperature Range: All substitutes operate within the -10°C to 70°C range specified for the original part
• RoHS Compliance: All substitutes maintain ROHS3 compliance, ensuring regulatory alignment

The identified substitutes (JPL26B and JPL26P) are both from the NKK Switches JP series. These parts differ from the SB25 in circuit configuration (DPST instead of DPDT) and mounting style (snap-in instead of rear panel mount), representing functional alternatives rather than direct pin-for-pin replacements.

Parameter Comparison

Engineering Selection Recommendations

JPL26B and JPL26P are active production alternatives from NKK Switches that maintain electrical compatibility at 125V AC and 16A current rating. Both parts are ROHS3 compliant and feature extended electrical life (25,000 cycles) compared to the SB25 (10,000 cycles).

Selection between JPL26B and JPL26P depends on packaging requirements: JPL26B is supplied in trays, while JPL26P is supplied in bulk. Both utilize snap-in panel mounting rather than rear termination, requiring mechanical redesign of the panel interface.

The circuit configuration difference (DPST versus DPDT) must be evaluated against the original application requirements. DPST configuration provides single-pole switching suitable for on-off control, while DPDT provides dual-pole switching for more complex circuit logic. Application circuit analysis is necessary to determine if DPST functionality is sufficient for the intended use.

Frequently Asked Questions (FAQ)

Q: Can JPL26B or JPL26P be used as direct replacements for SB25?

A: JPL26B and JPL26P are functional alternatives, not direct pin-for-pin replacements. They maintain the same voltage (125V AC) and current (16A) ratings, but differ in circuit configuration (DPST vs. DPDT) and mounting style (snap-in vs. rear panel mount). Panel interface modification is required.

Q: What is the difference between JPL26B and JPL26P?

A: JPL26B and JPL26P are electrically identical. The primary difference is packaging: JPL26B is supplied in trays, while JPL26P is supplied in bulk. Both feature identical electrical specifications, mechanical life, and compliance certifications.

Q: Does the DPST configuration of JPL26B/JPL26P affect compatibility?

A: The SB25 is DPDT (dual-pole), while JPL26B and JPL26P are DPST (single-pole). This circuit difference must be evaluated against the original application. If the application requires dual-pole switching, DPST alternatives may not be suitable without circuit redesign.

Q: Are JPL26B and JPL26P RoHS compliant?

A: Yes, both JPL26B and JPL26P are ROHS3 compliant, matching the compliance status of the obsolete SB25.

Q: What are the mechanical life differences?

A: The SB25 is rated for 30,000 mechanical cycles, while JPL26B and JPL26P are rated for 25,000 cycles. The electrical life of the substitutes (25,000 cycles) exceeds that of the SB25 (10,000 cycles).