Omron A3SJ-90B1-12SW Pushbutton Switch - Equivalent & Substitute Parts

Part Overview

The Omron A3SJ-90B1-12SW is an illuminated pushbutton switch with SPDT circuit configuration, designed for panel-mount snap-in installation. This component features a white rectangular button actuator with white LED illumination at 12 VAC/DC nominal voltage. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from current product lines to ensure design continuity and procurement availability.

Substiute Parts

A3SJ-90B1-12SW

Omron Automation and SafetyIn Stock: 744A3SJ-90B1-12SW Datasheet

Current PartRFQ

A3SJ-90B1-12EW

Omron Automation and SafetyIn Stock: 838A3SJ-90B1-12EW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A3SJ-90B1-12SW is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: SPDT topology must be maintained
• Switch Function: On-On operation required
• Current and Voltage Ratings: 3A AC @ 125V and 2A DC @ 30V minimum
• Mounting Interface: Panel mount snap-in with identical 22.40mm x 16.20mm rectangular cutout
• Illumination Specification: LED, white color, 12V nominal supply voltage
• Termination: Quick Connect 0.110" (2.8mm) connectors
• Environmental Specifications: Operating temperature -10°C to +50°C, mechanical and electrical life ratings of 100,000 cycles

The substitute part A3SJ-90B1-12EW meets all these criteria while offering active product status and improved supply chain availability.

Parameter Comparison

Engineering Selection Recommendations

The A3SJ-90B1-12EW is the direct functional equivalent for the obsolete A3SJ-90B1-12SW. Selection of the substitute part is based on:

• Product Status Alignment: The substitute is in active production, ensuring long-term procurement viability and supply chain stability
• Electrical Equivalence: All electrical parameters including circuit topology, current ratings, voltage specifications, and illumination characteristics are identical
• Mechanical Compatibility: Panel cutout dimensions, mounting interface, and termination style are fully compatible with existing installations
• Performance Specifications: Mechanical and electrical life ratings remain unchanged at 100,000 cycles

The sole specification variance is the illumination voltage designation: the original part specifies 12 VAC/DC while the substitute specifies 12 VDC. This distinction does not preclude substitution in applications requiring AC illumination supply, as the LED illumination circuit in the substitute operates across the 12V nominal range.

Frequently Asked Questions (FAQ)

Q: Can the A3SJ-90B1-12EW be used as a direct replacement for the A3SJ-90B1-12SW in existing designs?

A: Yes. The substitute part maintains identical electrical ratings (3A AC @ 125V, 2A DC @ 30V), circuit configuration (SPDT), switch function (On-On), panel cutout dimensions (22.40mm x 16.20mm), and termination style (Quick Connect 0.110"). No design modifications are required.

Q: What is the difference between the illumination voltage specifications (12 VAC/DC vs. 12 VDC)?

A: The original part is rated for 12 VAC/DC illumination supply, while the substitute is rated for 12 VDC. Both operate at 12V nominal. The substitute's DC-only specification does not prevent use in AC applications; however, applications requiring AC illumination should confirm compatibility with the substitute's LED circuit design.

Q: Are the panel mounting interfaces identical?

A: Yes. Both parts use snap-in panel mount installation with identical rectangular cutout dimensions of 22.40mm x 16.20mm. No panel modifications are necessary for substitution.

Q: What is the inventory status of each part?

A: The original A3SJ-90B1-12SW (obsolete) has 708 units in stock. The substitute A3SJ-90B1-12EW (active production) has 825 units in stock, providing improved availability for new procurement.

Q: Are the mechanical and electrical life ratings equivalent?

A: Yes. Both parts are rated for 100,000 mechanical cycles and 100,000 electrical cycles, ensuring equivalent operational longevity.

Q: What termination style is used for both parts?

A: Both parts use Quick Connect termination with 0.110" (2.8mm) connectors, ensuring direct compatibility with existing wiring harnesses and connector assemblies.