KB25KKW01-FF Equivalent & Substitute Parts

Part Overview

The KB25KKW01-FF 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, snap-in applications with a square green button actuator and solder lug termination. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing maintenance, repair, and design continuity in applications where this switch was originally specified.

Substiute Parts

KB25KKW01-FF

NKK SwitchesIn Stock: 687KB25KKW01-FF Datasheet

Current PartRFQ

YB25KKW01-FB

NKK SwitchesIn Stock: 1122YB25KKW01-FB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KB25KKW01-FF is determined by strict alignment of the following critical parameters:

Mandatory Compatibility Parameters:

• Circuit configuration (DPDT)
• Switch function (On-Mom momentary operation)
• Voltage ratings (125V AC minimum, 30V DC)
• Mounting type (Panel Mount, Snap-In)
• Actuator type (Square button)
• Termination compatibility with solder lug applications

Allowable Variation Parameters:

• Current rating (substitute must meet or exceed 1A requirement)
• Mechanical and electrical life cycles (substitute may exceed original specifications)
• Panel cutout diameter (physical panel modifications may be required)
• Actuator color (functional equivalence, not performance-critical)
• Packaging format (does not affect electrical or mechanical function)

The YB25KKW01-FB meets all mandatory compatibility 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). However, termination style and panel cutout dimensions differ and require engineering evaluation.

Parameter Comparison

Engineering Selection Recommendations

The YB25KKW01-FB is a functionally equivalent substitute for the obsolete KB25KKW01-FF based on identical circuit configuration, switch function, voltage ratings, and mounting specifications. Both components maintain ROHS3 compliance and are manufactured by NKK Switches.

Selection of the YB25KKW01-FB requires consideration of two physical differences:

Termination Style: The substitute provides both solder and quick connect (0.110" / 2.8mm) termination options, whereas the original part features solder lug only. Applications using solder lug connections can utilize the solder termination option on the substitute without modification.

Panel Cutout Diameter: The substitute requires a 16.00mm diameter cutout compared to the original 12.30mm specification. Existing panel designs will require enlargement of the mounting aperture to accommodate the substitute component.

The YB25KKW01-FB's enhanced performance specifications (3A current rating, 1,000,000 mechanical life cycles, 100,000 electrical life cycles) provide additional design margin and extended component life compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can the YB25KKW01-FB directly replace the KB25KKW01-FF without any modifications?

A: Electrical and functional replacement is direct. Physical installation requires panel cutout enlargement from 12.30mm to 16.00mm diameter. Termination compatibility depends on the specific connection method used in the original application.

Q: What is the significance of the different current ratings (1A vs. 3A)?

A: The substitute's 3A rating exceeds the original 1A requirement, providing additional capacity for the same application. This does not create incompatibility; the substitute can safely handle circuits designed for 1A operation.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant and REACH unaffected. No compliance barriers exist for substitution.

Q: Why is the panel cutout diameter larger on the substitute?

A: The YB25KKW01-FB belongs to a different product series (YB vs. KB) with different mechanical packaging. The 16.00mm cutout is a physical characteristic of the YB series design.

Q: What termination options does the YB25KKW01-FB provide?

A: The substitute offers both solder and quick connect (0.110" / 2.8mm) termination. Applications originally using solder lug connections can utilize the solder termination option.

Q: Is the YB25KKW01-FB currently available?

A: Yes, the YB25KKW01-FB is listed as active product status with 1,085 pieces in stock, compared to the obsolete KB25KKW01-FF.