KB25SKW01B-A Equivalent & Substitute Parts

Part Overview

The KB25SKW01B-A 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-facing installation. The product is currently classified as obsolete, making identification of suitable substitute parts essential for ongoing maintenance, repair, and new design implementations where equivalent functionality is required.

Substiute Parts

KB25SKW01B-A

NKK SwitchesIn Stock: 865KB25SKW01B-A Datasheet

Current PartRFQ

YB25WSKW01-FB

NKK SwitchesIn Stock: 1051YB25WSKW01-FB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the KB25SKW01B-A 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
• Operating Temperature Range: -25°C to 70°C
• RoHS Status: ROHS3 Compliant

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
• Actuator Type: Square, Button (consistent)
• Termination Style: May differ if electrical compatibility is maintained
• Panel Cutout Dimensions: May vary within mechanical design constraints

The substitute part YB25WSKW01-FB meets all mandatory matching parameters while providing enhanced performance specifications in current rating, mechanical life, and electrical life ratings.

Parameter Comparison

Engineering Selection Recommendations

The YB25WSKW01-FB is a direct functional substitute for the obsolete KB25SKW01B-A. Both components are manufactured by NKK Switches and maintain identical electrical specifications for voltage and switching function. The substitute part carries active product status, ensuring ongoing availability and supply chain continuity.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), meeting current environmental and reliability standards. The YB25WSKW01-FB provides enhanced performance characteristics with higher current capacity (3A versus 1A), extended mechanical life (1,000,000 versus 100,000 cycles), and improved electrical life (100,000 versus 50,000 cycles).

Mechanical design considerations include panel cutout dimension differences: the main part requires a 12.30mm circular cutout, while the substitute requires a 16.00mm circular cutout. Termination style differs between solder lug (main part) and solder with quick connect 0.110" options (substitute part), requiring verification of circuit board layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can YB25WSKW01-FB directly replace KB25SKW01B-A in existing designs?

A: Electrical substitution is valid. The YB25WSKW01-FB maintains identical voltage ratings, circuit configuration, and switching function. However, mechanical integration requires verification of panel cutout dimensions (12.30mm versus 16.00mm) and termination style compatibility with existing circuit board layouts.

Q: What are the key differences between these two parts?

A: The primary differences are current rating (1A to 3A), mechanical life (100,000 to 1,000,000 cycles), electrical life (50,000 to 100,000 cycles), panel cutout diameter (12.30mm to 16.00mm), and termination options (solder lug versus solder with quick connect). All electrical parameters for voltage and switching function remain identical.

Q: Why is the KB25SKW01B-A classified as obsolete?

A: The KB25SKW01B-A is no longer in active production. The YB25WSKW01-FB represents the current active equivalent from NKK Switches, offering improved performance specifications and continued manufacturing support.

Q: Are both parts RoHS compliant?

A: Yes, both KB25SKW01B-A and YB25WSKW01-FB are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1).

Q: What packaging differences exist between these parts?

A: The KB25SKW01B-A is supplied without specified packaging notation, while YB25WSKW01-FB is supplied in tray packaging. Verify packaging requirements for your procurement and assembly processes.