SB25-BA Equivalent & Substitute Parts

Part Overview

The SB25-BA 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 functionally equivalent alternatives necessary for ongoing maintenance, repair, and system support applications.

Substiute Parts

SB25-BA

NKK SwitchesIn Stock: 888SB25-BA 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

The substitute parts JPL26B and JPL26P are functionally related to the SB25-BA based on the following allowed parameters:

Matching Parameters:

• Manufacturer: NKK Switches (same manufacturer ensures design consistency and reliability)
• Voltage Rating: 125V AC (identical electrical specification)
• Operating Temperature Range: -10°C to 70°C (identical thermal operating envelope)
• Termination Style: Solder Lug (identical connection method)
• RoHS Status: ROHS3 Compliant (equivalent compliance certification)
• Mounting Type: Panel Mount (same general mounting category)

Differing Parameters:

• Circuit Configuration: JPL26B and JPL26P are DPST (Double Pole Single Throw), whereas SB25-BA is DPDT (Double Pole Double Throw)
• Switch Function: JPL26B and JPL26P are Off-On, whereas SB25-BA is On-On
• Current Rating: JPL26B and JPL26P are rated 16A (AC), exceeding the SB25-BA rating of 15A (AC)
• Mechanical Life: JPL26B and JPL26P offer 25,000 cycles versus SB25-BA's 30,000 cycles
• Electrical Life: JPL26B and JPL26P offer 25,000 cycles versus SB25-BA's 10,000 cycles
• Mounting Subtype: JPL26B and JPL26P use Snap-In mounting versus SB25-BA's Rear mounting
• Actuator Type: JPL26B features rectangular button; JPL26P features plunger for cap; SB25-BA features round button

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SB25-BA is obsolete, while JPL26B and JPL26P are active products. Active product status ensures ongoing manufacturer support, availability, and compliance maintenance.

Compliance and Certification: All three parts maintain ROHS3 compliance and REACH unaffected status, confirming equivalent environmental and regulatory standing.

Electrical Compatibility: JPL26B and JPL26P both operate at 125V AC with current ratings of 16A, which exceeds the SB25-BA specification of 15A. This provides margin for electrical compatibility in applications where the SB25-BA was previously used.

Mechanical and Electrical Life: JPL26B and JPL26P offer superior electrical life (25,000 cycles versus 10,000 cycles), providing extended operational reliability. Mechanical life is slightly lower (25,000 cycles versus 30,000 cycles), representing a minor trade-off.

Mounting and Physical Differences: The transition from rear panel mount to snap-in panel mount requires mechanical redesign of the panel interface. The change from DPDT to DPST circuit configuration and from On-On to Off-On switch function requires circuit-level evaluation to confirm functional equivalence in the target application.

Frequently Asked Questions (FAQ)

Q: Can JPL26B or JPL26P directly replace SB25-BA without circuit modification?

A: Direct replacement requires verification that the application circuit supports DPST Off-On functionality instead of DPDT On-On functionality. The circuit configurations differ fundamentally and must be evaluated against application requirements.

Q: What is the difference between JPL26B and JPL26P?

A: JPL26B and JPL26P are electrically and mechanically identical. The primary difference is packaging: JPL26B is supplied in Tray packaging, while JPL26P is supplied in Bulk packaging. Both feature identical electrical specifications, current ratings, voltage ratings, and operating characteristics.

Q: Are the current ratings compatible?

A: Yes. JPL26B and JPL26P are rated for 16A (AC), which exceeds the SB25-BA rating of 15A (AC). Applications designed for 15A operation are within the electrical capability of the substitute parts.

Q: What mounting changes are required?

A: The SB25-BA uses rear panel mount termination, while JPL26B and JPL26P use snap-in panel mount. Panel cutout dimensions differ: SB25-BA requires a circular 12.50mm diameter cutout, while JPL26B and JPL26P require a rectangular 28.00mm x 21.20mm cutout. Physical panel modification is necessary.

Q: Are there any compliance differences?

A: No. All three parts maintain ROHS3 compliance and REACH unaffected status, confirming equivalent regulatory standing.

Q: Which substitute part should be selected for new designs?

A: JPL26B and JPL26P are functionally equivalent. Selection between them depends on procurement and inventory requirements: JPL26B for tray packaging or JPL26P for bulk packaging. Both are active products with ongoing manufacturer support.