Omron A3SJ-90C1-24SW Equivalent & Substitute Parts

Part Overview

The Omron A3SJ-90C1-24SW is a DPDT pushbutton switch with 3A/125V AC rating and 24 VAC/DC amber LED illumination, designed for panel-mount snap-in applications. This part is classified as obsolete, making identification of equivalent and substitute components essential for system maintenance, repair, and redesign applications. Substitute parts must maintain electrical performance across AC/DC ratings, mechanical reliability, and panel mounting compatibility.

Substiute Parts

A3SJ-90C1-24SW

Omron Automation and SafetyIn Stock: 901A3SJ-90C1-24SW Datasheet

Current PartRFQ

A3SJ-90C1-24EW

Omron Automation and SafetyIn Stock: 765A3SJ-90C1-24EW Datasheet

MFR RecommendedRFQ

LB25RKW01-5D24-JB

NKK SwitchesIn Stock: 754LB25RKW01-5D24-JB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the A3SJ-90C1-24SW are qualified based on the following critical parameters:

• Electrical Equivalence: DPDT circuit configuration with 3A AC / 2A DC current ratings and 125V AC / 30V DC voltage ratings
• Mechanical Compatibility: Panel mount snap-in design with identical 22.40mm x 16.20mm rectangular cutout dimensions
• Functional Compatibility: On-momentary switch function with 24V illumination voltage
• Termination Compatibility: Quick Connect 0.110" (2.8mm) termination style
• Operational Specifications: Mechanical life of 1,000,000 cycles and electrical life of 100,000 cycles

Parts are grouped into two categories: MFR Recommended (Omron direct equivalent) and Similar (cross-manufacturer equivalent).

Parameter Comparison

Engineering Selection Recommendations

MFR Recommended Substitute: A3SJ-90C1-24EW

The A3SJ-90C1-24EW is the direct Omron equivalent with active product status. This part maintains identical electrical ratings, mechanical dimensions, and operational specifications. The primary difference is illumination color (white LED versus amber LED). This part is recommended for applications where illumination color is not a critical design parameter and where maintaining the Omron product line is preferred.

Similar Substitute: LB25RKW01-5D24-JB

The LB25RKW01-5D24-JB from NKK Switches provides cross-manufacturer equivalence with active product status and ROHS3 compliance. This part matches all critical electrical and mechanical parameters. Notable differences include DC current rating (3A versus 2A), expanded operating temperature range (-25°C to 50°C), and dual termination options (solder and quick connect). The NKK part is suitable for applications requiring higher DC current capacity or extended low-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the A3SJ-90C1-24EW replace the obsolete A3SJ-90C1-24SW directly?

A: Yes. The A3SJ-90C1-24EW maintains identical electrical ratings (3A AC / 2A DC, 125V AC / 30V DC), circuit configuration (DPDT), mechanical dimensions (22.40mm x 16.20mm panel cutout), and termination style (Quick Connect 0.110"). The only difference is illumination color (white versus amber). Direct substitution is electrically and mechanically compatible.

Q: What is the difference between the Omron A3SJ-90C1-24EW and the NKK LB25RKW01-5D24-JB?

A: Both parts are electrically and mechanically equivalent for the primary application. The NKK part offers higher DC current rating (3A versus 2A), extended low-temperature operation (-25°C versus -10°C minimum), and dual termination options. The Omron part maintains the original manufacturer line. Selection depends on application requirements and supply chain preferences.

Q: Are there any compatibility issues with panel cutout dimensions?

A: No. All three parts (main, MFR recommended, and similar) share identical panel cutout dimensions of 22.40mm x 16.20mm rectangular format. Panel mounting is directly compatible without modification.

Q: Does illumination color affect electrical substitution?

A: No. Illumination color (amber versus white LED) is a visual indicator only and does not affect electrical performance or circuit compatibility. Both colors operate at 24V illumination voltage. Selection is based on application visibility requirements.

Q: What is the significance of the NKK part offering both solder and quick connect termination?

A: The LB25RKW01-5D24-JB provides dual termination options, allowing installation flexibility. The quick connect option (0.110" / 2.8mm) matches the original A3SJ-90C1-24SW specification. The solder option provides an alternative for applications requiring permanent connections.

Q: Is the extended operating temperature range of the NKK part significant?

A: The NKK LB25RKW01-5D24-JB operates from -25°C to 50°C compared to -10°C to 50°C for the Omron parts. This extended low-temperature capability is relevant only for applications operating below -10°C. For standard industrial environments, this difference is not operationally significant.