Omron A3SA-90B1-24SW Equivalent & Substitute Parts

Part Overview

The Omron A3SA-90B1-24SW is a pushbutton switch with SPDT (Single Pole Double Throw) configuration, rated for 3A at 125V AC and 2A at 30V DC. This component features illumination with amber LED at 24 VAC/DC nominal voltage and is designed for panel mount snap-in installation with a square 16.20mm x 16.20mm cutout. The part is currently obsolete, making identification of functionally equivalent alternatives necessary for ongoing maintenance, repair, and system continuity in applications where this switch was originally specified.

Substiute Parts

A3SA-90B1-24SW

Omron Automation and SafetyIn Stock: 982A3SA-90B1-24SW Datasheet

Current PartRFQ

A3SA-90B1-24EW

Omron Automation and SafetyIn Stock: 905A3SA-90B1-24EW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3SA-90B1-24SW is determined by strict equivalence across the following critical parameters:

• Circuit configuration (SPDT)
• Current and voltage ratings (3A AC / 2A DC; 125V AC / 30V DC)
• Mounting type and panel cutout dimensions (Panel Mount, Snap-In; 16.20mm x 16.20mm square)
• Termination style (Quick Connect - 0.110" / 2.8mm)
• Illumination type (LED)
• Operating temperature range (-10°C ~ 50°C)
• Mechanical and electrical life (100,000 cycles each)

The Omron A3SA-90B1-24EW qualifies as a manufacturer-recommended substitute because it maintains all critical electrical and mechanical parameters. The primary difference is the illumination color (white LED instead of amber) and illumination voltage specification (24 VDC instead of 24 VAC/DC). This substitute is currently in active production status, ensuring availability and ongoing support.

Parameter Comparison

Engineering Selection Recommendations

The A3SA-90B1-24EW is the manufacturer-recommended substitute for the obsolete A3SA-90B1-24SW. Both components maintain identical electrical ratings, mechanical specifications, and panel mounting dimensions. The substitute is currently in active production status, ensuring supply chain continuity and technical support availability.

The primary distinction between the two parts is the illumination color specification: the original part features amber LED illumination, while the substitute provides white LED illumination. Additionally, the illumination voltage is specified as 24 VDC for the substitute versus 24 VAC/DC for the original part. Both components are RoHS compliant and meet the same operational and lifecycle requirements.

Selection of the A3SA-90B1-24EW is appropriate for applications requiring direct functional replacement of the A3SA-90B1-24SW, provided that the illumination color change from amber to white is acceptable within the system design and user interface requirements.

Frequently Asked Questions (FAQ)

Q: Can the A3SA-90B1-24EW directly replace the A3SA-90B1-24SW in existing installations?

A: Yes, the A3SA-90B1-24EW is the manufacturer-recommended substitute. All electrical ratings, mechanical specifications, and panel mounting dimensions are identical. The primary consideration is the illumination color change from amber to white.

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

A: The original A3SA-90B1-24SW is specified for 24 VAC/DC illumination voltage, while the substitute A3SA-90B1-24EW is specified for 24 VDC. Both operate at the same nominal voltage level; the difference reflects the AC/DC capability specification.

Q: Are both parts RoHS compliant?

A: Yes, both the A3SA-90B1-24SW and A3SA-90B1-24EW are RoHS compliant.

Q: What are the panel cutout dimensions for installation?

A: Both parts require a square panel cutout of 16.20mm x 16.20mm for snap-in mounting.

Q: What is the electrical rating for both switches?

A: Both switches are rated for 3A at 125V AC and 2A at 30V DC, with SPDT circuit configuration and On-On switch function.

Q: What is the mechanical and electrical life expectancy?

A: Both components are rated for 100,000 mechanical cycles and 100,000 electrical cycles.

Q: Why is the original part marked as obsolete?

A: The A3SA-90B1-24SW has been discontinued by the manufacturer. The A3SA-90B1-24EW is the active production equivalent that maintains all critical functional and mechanical specifications.