SB25-DB Equivalent & Substitute Parts

Part Overview

The SB25-DB 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 white round 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-DB

NKK SwitchesIn Stock: 902SB25-DB Datasheet

Current PartRFQ

JPL26B

NKK SwitchesIn Stock: 1363JPL26B Datasheet

SimilarRFQ

JPL26P

NKK SwitchesIn Stock: 940JPL26P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute parts JPL26B and JPL26P are both from the NKK Switches JP series and share the following compatibility parameters with the SB25-DB:

• Voltage Rating: 125V AC (identical)
• Termination Style: Solder Lug (identical)
• Operating Temperature Range: -10°C to 70°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• Manufacturer: NKK Switches (same manufacturer)

However, the following parameters differ and must be evaluated for application compatibility:

• Circuit Configuration: SB25-DB is DPDT; substitutes are DPST (one fewer pole)
• Current Rating: SB25-DB is 15A; substitutes are 16A (higher capacity)
• Mounting Type: SB25-DB is Panel Mount Rear; substitutes are Panel Mount Snap-In
• Switch Function: SB25-DB is On-On; substitutes are Off-On
• Actuator Type: SB25-DB is Round Button; substitutes are Rectangular Button or Plunger
• Panel Cutout Dimensions: SB25-DB is Circular 12.50mm; substitutes are Rectangular 28.00mm x 21.20mm

Parameter Comparison

Engineering Selection Recommendations

JPL26B and JPL26P are active products from NKK Switches with current manufacturing support and ROHS3 compliance. Both substitutes provide higher electrical life ratings (25,000 cycles versus 10,000 cycles for the SB25-DB) and increased current capacity (16A versus 15A).

Selection between JPL26B and JPL26P depends on packaging requirements: JPL26B is supplied in Tray packaging, while JPL26P is supplied in Bulk packaging.

Critical design considerations for substitution include: the change from DPDT to DPST circuit configuration reduces switching capability by one pole; the transition from rear panel mount to snap-in mounting requires panel cutout modification from circular 12.50mm to rectangular 28.00mm x 21.20mm; and the switch function change from On-On to Off-On alters operational behavior. These differences require circuit design review and mechanical panel redesign before implementation.

Frequently Asked Questions (FAQ)

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

A: No. The substitutes differ in circuit configuration (DPST versus DPDT), switch function (Off-On versus On-On), and mounting type (Snap-In versus Rear). Circuit redesign and panel modification are required.

Q: What is the difference between JPL26B and JPL26P?

A: Both parts are electrically and mechanically identical. The difference is packaging: JPL26B is supplied in Tray packaging, while JPL26P is supplied in Bulk packaging. Select based on procurement and inventory requirements.

Q: Are the substitute parts compliant with the same standards as SB25-DB?

A: Yes. Both JPL26B and JPL26P are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control, matching the compliance profile of SB25-DB.

Q: What are the panel cutout dimension changes required?

A: SB25-DB requires a circular cutout of 12.50mm diameter. JPL26B and JPL26P require a rectangular cutout of 28.00mm x 21.20mm. Panel redesign is necessary for mechanical compatibility.

Q: Do the substitutes provide better electrical performance?

A: Yes. JPL26B and JPL26P provide 25,000 electrical life cycles compared to 10,000 cycles for SB25-DB, and support 16A current rating versus 15A. Mechanical life is 25,000 cycles versus 30,000 cycles for the original part.