Omron A3SA-90C1-24SW Equivalent & Substitute Parts

Part Overview

The Omron A3SA-90C1-24SW is a DPDT pushbutton switch with illuminated panel mount design, rated for 3A at 125V AC and 2A at 30V DC. This component features a square white actuator with amber LED illumination at 24 VAC/DC nominal voltage. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations where this switch type is required.

Substiute Parts

A3SA-90C1-24SW

Omron Automation and SafetyIn Stock: 970A3SA-90C1-24SW Datasheet

Current PartRFQ

A3SA-90C1-24EW

Omron Automation and SafetyIn Stock: 1017A3SA-90C1-24EW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A3SA-90C1-24SW is determined by strict equivalence across the following critical parameters:

• Circuit configuration (DPDT)
• Switch function (On-Mom momentary operation)
• Current and voltage ratings (3A AC / 2A DC; 125V AC / 30V DC)
• Mounting type (Panel Mount, Snap-In)
• Actuator type and dimensions (Square button; 16.20mm x 16.20mm panel cutout)
• Termination style (Quick Connect - 0.110" / 2.8mm)
• Operating temperature range (-10°C to 50°C)
• Mechanical and electrical life specifications (1,000,000 cycles mechanical; 100,000 cycles electrical)

The A3SA-90C1-24EW meets all these criteria. Variations in illumination color (amber vs. white LED) and illumination voltage specification (24 VAC/DC vs. 24 VDC) do not affect functional substitution when the illumination circuit design accommodates the specified voltage range.

Parameter Comparison

Engineering Selection Recommendations

The A3SA-90C1-24EW is the direct functional equivalent for the obsolete A3SA-90C1-24SW. The substitute part maintains active product status with Omron, ensuring continued availability and supply chain reliability. Both components share identical electrical ratings, mechanical specifications, and panel mounting characteristics.

The primary difference is illumination color: the original part provides amber LED indication, while the substitute provides white LED indication. The illumination voltage specification differs slightly (24 VAC/DC vs. 24 VDC); however, both operate within standard industrial control voltage ranges. Selection between these variants depends on the specific visual indication requirements of the application and the illumination circuit design.

Frequently Asked Questions (FAQ)

Q: Can the A3SA-90C1-24EW directly replace the A3SA-90C1-24SW in existing installations?

A: Yes. Both parts share identical DPDT circuit configuration, current and voltage ratings, mounting dimensions, and termination style. Direct mechanical and electrical substitution is supported.

Q: What is the significance of the illumination color difference?

A: The original part uses amber LED illumination; the substitute uses white LED illumination. This affects only the visual indication color on the panel. The functional operation of the switch remains unchanged. Selection should be based on the application's visual indication requirements and operator interface design.

Q: Are there compatibility concerns with the illumination voltage specifications?

A: The original part is rated for 24 VAC/DC; the substitute is rated for 24 VDC. Both operate within standard industrial control voltage ranges. If the illumination circuit supplies AC voltage, the substitute part's DC-only specification should be evaluated against the actual circuit design. Most modern control systems operate on DC voltage, making the substitute appropriate for typical applications.

Q: What is the panel cutout requirement for installation?

A: Both parts require a square panel cutout of 16.20mm x 16.20mm. No modification to existing panel openings is necessary when substituting between these parts.

Q: Are there any differences in mechanical or electrical life?

A: No. Both parts are rated for 1,000,000 mechanical cycles and 100,000 electrical cycles, ensuring equivalent operational longevity.