KB25SKW01B Equivalent & Substitute Parts

Part Overview

The KB25SKW01B is a pushbutton switch manufactured by NKK Switches, featuring DPDT (Double Pole Double Throw) circuitry with a 1A current rating at 125V AC. This component is designed for standard panel mount applications with front actuation using a plunger-type actuator and solder lug termination. The product is currently obsolete, making identification of suitable substitute components essential for ongoing maintenance, repair, and new design implementations where equivalent functionality is required.

Substiute Parts

KB25SKW01B

NKK SwitchesIn Stock: 862KB25SKW01B Datasheet

Current PartRFQ

YB25SKW01

NKK SwitchesIn Stock: 827YB25SKW01 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KB25SKW01B is determined by the following critical parameters:

Mandatory Matching Parameters:

• Circuit Configuration: DPDT
• Switch Function: On-Mom (Momentary)
• Voltage Rating - AC: 125V
• Voltage Rating - DC: 30V
• Mounting Type: Panel Mount, Front
• Actuator Type: Plunger for Cap
• Operating Temperature Range: -25°C to 70°C

Allowable Variation Parameters:

• Current Rating: May be equal to or greater than 1A
• Mechanical Life: May be equal to or greater than 100,000 cycles
• Electrical Life: May be equal to or greater than 50,000 cycles
• Termination Style: Alternative termination methods acceptable if panel mount compatibility maintained
• Panel Cutout Dimensions: May differ if mechanical integration is feasible

The YB25SKW01 qualifies as a substitute because it maintains all mandatory matching parameters while exceeding performance specifications in current rating (3A vs. 1A), mechanical life (1,000,000 vs. 100,000 cycles), and electrical life (100,000 vs. 50,000 cycles).

Parameter Comparison

Engineering Selection Recommendations

The YB25SKW01 is an active product with current manufacturing support, whereas the KB25SKW01B is obsolete. Both components maintain ROHS3 compliance and REACH unaffected status. The YB25SKW01 provides superior performance characteristics with higher current capacity (3A vs. 1A), extended mechanical life (1,000,000 vs. 100,000 cycles), and doubled electrical life (100,000 vs. 50,000 cycles). The primary design consideration is the panel cutout dimension increase from 12.30mm to 16.00mm diameter, which requires mechanical integration verification. Termination style differs between solder lug and quick connect options; circuit integration must accommodate the alternative termination method.

Frequently Asked Questions (FAQ)

Q: Can YB25SKW01 directly replace KB25SKW01B in existing designs?

A: Functional substitution is possible because both components share identical circuit configuration (DPDT), switch function (On-Mom), voltage ratings (125V AC / 30V DC), and operating temperature range. However, panel cutout dimensions differ (12.30mm vs. 16.00mm), requiring mechanical redesign of the mounting interface. Termination style also differs; circuit integration must accommodate quick connect terminals instead of solder lugs.

Q: What are the key compatibility criteria for KB25SKW01B substitutes?

A: Substitute components must maintain DPDT circuit configuration, On-Mom switch function, 125V AC and 30V DC voltage ratings, panel mount front actuation, plunger actuator type, and -25°C to 70°C operating temperature range. Current rating may equal or exceed 1A. Mechanical and electrical life specifications may exceed the original values.

Q: Why is the panel cutout dimension different between these parts?

A: The YB25SKW01 features a larger 16.00mm diameter cutout compared to the KB25SKW01B's 12.30mm diameter. This reflects design differences between the obsolete KB series and the active YB series. Panel integration requires verification that the larger cutout can be accommodated or that mechanical adapters are feasible.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both KB25SKW01B and YB25SKW01 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the higher current rating in YB25SKW01?

A: The YB25SKW01 supports 3A current capacity compared to 1A in the KB25SKW01B. This provides design margin for applications requiring higher switching current and reduces thermal stress during operation. The substitute is suitable for applications originally designed for 1A operation.