KB25SKW01-6B-JB Equivalent & Substitute Parts

Part Overview

The KB25SKW01-6B-JB is a pushbutton switch manufactured by NKK Switches, featuring DPDT (Double Pole Double Throw) circuit configuration with illuminated panel mount design. This component operates at 1A AC/DC with 125V AC and 30V DC voltage ratings, utilizing LED white illumination at 3.3VDC nominal. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where this series is no longer available.

Key Parameters

Parameter	Value
Manufacturer	NKK Switches
Circuit Configuration	DPDT
Switch Function	On-Mom
Current Rating	1A (AC/DC)
Voltage Rating - AC	125V
Voltage Rating - DC	30V
Mounting Type	Panel Mount, Front
Illumination Type	LED, White
Illumination Voltage	3.3VDC
Panel Cutout Diameter	12.30mm
Termination Style	Solder Lug
Operating Temperature Range	-25°C to 50°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The YB25SKW01-6B-JB qualifies as a functional substitute based on the following alignment of critical parameters:

Matching Parameters:

Identical circuit configuration (DPDT)
Identical switch function (On-Mom)
Identical voltage ratings (125V AC / 30V DC)
Identical mounting type (Panel Mount, Front)
Identical illumination specification (LED, White at 3.3VDC)
Identical actuator type (Square, Button)
Identical operating temperature range (-25°C to 50°C)
Identical RoHS3 compliance and REACH unaffected status

Differing Parameters Affecting Substitution:

Current rating increased from 1A to 3A
Panel cutout diameter increased from 12.30mm to 16.00mm
Termination style changed from Solder Lug to Solder/Quick Connect
Mechanical life upgraded from 100,000 to 1,000,000 cycles
Electrical life upgraded from 50,000 to 100,000 cycles
Product status changed from Obsolete to Active

The YB25SKW01-6B-JB represents an enhanced variant within the NKK Switches illuminated pushbutton portfolio, maintaining core electrical specifications while providing superior current handling capacity and operational longevity.

Parameter Comparison

Parameter	KB25SKW01-6B-JB (Main)	YB25SKW01-6B-JB (Substitute)
Manufacturer	NKK Switches	NKK Switches
Series	KB	YB
Product Status	Obsolete	Active
Circuit Configuration	DPDT	DPDT
Switch Function	On-Mom	On-Mom
Current Rating (AC/DC)	1A	3A
Voltage Rating - AC	125V	125V
Voltage Rating - DC	30V	30V
Mounting Type	Panel Mount, Front	Panel Mount, Front
Actuator Type	Square, Button	Square, Button
Illumination Type, Color	LED, White	LED, White
Illumination Voltage (Nominal)	3.3VDC	3.3VDC
Termination Style	Solder Lug	Solder, Quick Connect - 0.110" (2.8mm)
Panel Cutout Diameter	12.30mm	16.00mm
Operating Temperature	-25°C to 50°C	-25°C to 50°C
Mechanical Life	100,000 Cycles	1,000,000 Cycles
Electrical Life	50,000 Cycles	100,000 Cycles
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The YB25SKW01-6B-JB is suitable as a substitute for KB25SKW01-6B-JB applications where the following conditions are met:

Electrical Compatibility: The substitute maintains identical voltage and switch function specifications. The increased current rating (3A versus 1A) provides enhanced capacity without reducing performance in lower-current applications.

Mechanical Compatibility: Panel cutout diameter increases from 12.30mm to 16.00mm. Mechanical redesign of the panel mounting interface is required. Termination style changes from Solder Lug to Solder/Quick Connect, necessitating PCB layout modification.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying equivalent environmental and regulatory requirements.

Product Availability: The substitute is classified as Active product status, ensuring ongoing availability and supply chain continuity compared to the obsolete KB25SKW01-6B-JB.

Frequently Asked Questions (FAQ)

Q: Can YB25SKW01-6B-JB directly replace KB25SKW01-6B-JB without modification?

A: Direct replacement is not possible without mechanical and electrical modifications. The panel cutout diameter differs (16.00mm versus 12.30mm), and termination style changes from Solder Lug to Solder/Quick Connect. Panel drilling and PCB layout changes are required.

Q: Are the voltage and illumination specifications identical?

A: Yes. Both components operate at 125V AC / 30V DC with LED white illumination at 3.3VDC nominal. Electrical performance in these parameters is equivalent.

Q: What is the significance of the increased current rating?

A: The YB25SKW01-6B-JB supports 3A versus 1A in the KB25SKW01-6B-JB. This provides additional current handling capacity. In applications requiring only 1A, the substitute operates within safe margins without performance degradation.

Q: How do the mechanical life ratings differ?

A: The substitute provides 1,000,000 mechanical cycles compared to 100,000 cycles in the original part. This represents a tenfold improvement in operational longevity and reliability.

Q: What packaging differences exist?

A: The KB25SKW01-6B-JB uses standard packaging, while the YB25SKW01-6B-JB is supplied in Tray packaging. This affects inventory handling and component dispensing procedures.

Q: Are both components RoHS compliant?

A: Yes. Both KB25SKW01-6B-JB and YB25SKW01-6B-JB are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting equivalent environmental standards.

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