Omron A3SA-90A1-24SW Equivalent & Substitute Parts

Part Overview

The Omron A3SA-90A1-24SW is a pushbutton switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 3A at 125V AC and 2A at 30V DC. This component features illuminated panel mount design with amber LED indication at 24 VAC/DC nominal voltage and snap-in mounting for standard 16.20mm square panel cutouts. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing maintenance, repair, and system continuity in industrial control applications.

Substiute Parts

A3SA-90A1-24SW

Omron Automation and SafetyIn Stock: 745A3SA-90A1-24SW Datasheet

Current PartRFQ

A3SA-90A1-24EW

Omron Automation and SafetyIn Stock: 1049A3SA-90A1-24EW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete A3SA-90A1-24SW is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Requirements:

• SPDT circuit configuration (mandatory)
• Current rating minimum 3A at 125V AC and 2A at 30V DC
• Voltage ratings of 125V AC and 30V DC
• Switch function On-Mom (momentary operation)

Mechanical & Physical Compatibility Requirements:

• Panel mount, snap-in mounting type
• Square actuator button configuration
• Panel cutout dimensions 16.20mm x 16.20mm
• Quick Connect termination at 0.110" (2.8mm)

Illumination Requirements:

• LED illumination type
• 24V nominal illumination voltage (VAC/DC compatible)

Environmental & Lifecycle Requirements:

• Operating temperature range -10°C to 50°C
• Mechanical life minimum 1,000,000 cycles
• Electrical life minimum 100,000 cycles
• RoHS compliance

The substitute part A3SA-90A1-24EW meets all these criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The A3SA-90A1-24EW is the direct substitute for the obsolete A3SA-90A1-24SW based on electrical, mechanical, and functional equivalence across all critical parameters. The substitute maintains identical SPDT circuit configuration, current and voltage ratings, mounting dimensions, and lifecycle specifications.

Two differences require consideration:

Illumination Color: The substitute features white LED illumination instead of amber. This change does not affect electrical function but may impact visual indication in applications where amber color was specifically required for operational or safety protocols.

Illumination Voltage Input: The substitute accepts 24 VDC only, whereas the original accepts 24 VAC/DC. If the installation supplies 24 VAC to the illumination circuit, the substitute will not function. Verification of the illumination supply voltage in the target application is necessary before selection.

The substitute part is in active production status with confirmed inventory availability, providing supply chain continuity for the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the A3SA-90A1-24EW be used as a direct replacement for the A3SA-90A1-24SW in all applications?

A: The substitute is electrically and mechanically equivalent for switch operation. However, if the installation requires amber LED illumination or supplies 24 VAC to the illumination circuit, compatibility must be verified. The substitute provides white LED illumination and accepts 24 VDC only.

Q: What is the difference between the two part numbers?

A: The suffix designates illumination color and voltage specification. The "SW" suffix indicates amber LED with 24 VAC/DC input. The "EW" suffix indicates white LED with 24 VDC input. All other electrical and mechanical specifications are identical.

Q: Will the substitute fit the same panel cutout?

A: Yes. Both parts require a square 16.20mm x 16.20mm panel cutout and use identical snap-in mounting and quick connect termination. No mechanical modification is required.

Q: Is the substitute RoHS compliant?

A: The original part is confirmed RoHS compliant. RoHS status for the substitute was not provided in available documentation.

Q: What is the illumination voltage difference between the two parts?

A: The original accepts 24 VAC or 24 VDC for illumination. The substitute accepts 24 VDC only. If the installation supplies 24 VAC, the substitute illumination will not operate. Confirm the illumination supply voltage before selection.

Q: Are the electrical ratings identical?

A: Yes. Both parts are rated 3A at 125V AC and 2A at 30V DC with SPDT circuit configuration and On-Mom switch function. Mechanical life (1,000,000 cycles) and electrical life (100,000 cycles) are identical.