KB26SKW01-28-JC Equivalent & Substitute Parts

Part Overview

The KB26SKW01-28-JC is a DPDT pushbutton switch manufactured by NKK Switches, designed for panel-mount applications with incandescent illumination at 28 VAC. This component features a 1A current rating at 125V AC and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for system maintenance, repair, and redesign applications where continued availability cannot be guaranteed.

Substiute Parts

KB26SKW01-28-JC

NKK SwitchesIn Stock: 841KB26SKW01-28-JC Datasheet

Current PartRFQ

YB26SKW01-5C24-JC

NKK SwitchesIn Stock: 1049YB26SKW01-5C24-JC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KB26SKW01-28-JC is determined by the following critical parameters:

Mandatory Compatibility Parameters:

• Circuit configuration (DPDT)
• Switch function (On-On)
• Mounting type (Panel Mount, Front)
• Voltage rating compatibility (125V AC minimum)
• Actuator type (Square, Button)
• Operating temperature range (-25°C to 50°C)
• Termination compatibility with existing circuit board or harness

Functional Equivalence Parameters:

• Current rating must equal or exceed 1A
• Illumination color (Red)
• Panel cutout dimensions must accommodate mechanical fit

The YB26SKW01-5C24-JC qualifies as a substitute based on matching DPDT circuit configuration, On-On function, panel-mount front design, 125V AC voltage rating, square button actuator, and identical operating temperature range. The substitute part exceeds the current rating (3A vs. 1A) and mechanical/electrical life specifications, providing enhanced performance margins.

Parameter Comparison

Engineering Selection Recommendations

The YB26SKW01-5C24-JC is an active-status substitute for the obsolete KB26SKW01-28-JC. Both components are manufactured by NKK Switches and share identical DPDT circuit configuration, On-On switching function, and panel-mount front design specifications.

Key Considerations:

The substitute part provides superior performance characteristics with 3A current rating versus 1A, doubled mechanical life (200,000 vs. 100,000 cycles), and doubled electrical life (100,000 vs. 50,000 cycles). Both parts maintain the same voltage ratings (125V AC / 30V DC) and operating temperature range (-25°C to 50°C).

Design Integration Factors:

The illumination technology differs: the main part uses incandescent illumination at 28 VAC, while the substitute uses LED illumination at 1.9 VDC. This requires circuit redesign for the illumination supply. The panel cutout diameter increases from 12.30mm to 16.00mm, necessitating mechanical panel modification. Termination style changes from solder lug to solder with quick-connect options, requiring harness or PCB trace adaptation.

The substitute part's active product status ensures continued availability and supply chain reliability compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the YB26SKW01-5C24-JC directly replace the KB26SKW01-28-JC without modifications?

A: Direct replacement requires three modifications: (1) illumination supply circuit redesign from 28 VAC to 1.9 VDC for LED operation, (2) panel cutout enlargement from 12.30mm to 16.00mm diameter, and (3) termination harness or PCB trace adaptation from solder lug to quick-connect style. The electrical switching function remains compatible.

Q: What are the critical parameters for DPDT pushbutton switch substitution?

A: Circuit configuration (DPDT), switch function (On-On), voltage ratings (125V AC / 30V DC minimum), current rating (equal or greater than 1A), mounting type (panel mount, front), and operating temperature range (-25°C to 50°C) must match or exceed the original specification.

Q: Does the higher current rating of the substitute part affect circuit compatibility?

A: No. The 3A rating of the YB26SKW01-5C24-JC exceeds the 1A requirement of the original circuit, providing additional performance margin. The switch will operate correctly in circuits designed for 1A operation.

Q: What is the impact of changing from incandescent to LED illumination?

A: LED illumination operates at 1.9 VDC versus the original 28 VAC incandescent specification. This requires independent circuit redesign for the illumination supply, but does not affect the switch contact operation or electrical ratings.

Q: Are there mechanical compatibility issues with the larger panel cutout?

A: Yes. The substitute part requires a 16.00mm diameter panel cutout versus 12.30mm for the original part. Existing panel openings must be enlarged or the panel assembly must be modified.

Q: How do the lifecycle specifications compare?

A: The substitute part provides doubled mechanical life (200,000 vs. 100,000 cycles) and doubled electrical life (100,000 vs. 50,000 cycles), indicating enhanced durability and extended service intervals.