Equivalent & Substitute Parts for A3SJ-90D1-12SW

Part Overview

The A3SJ-90D1-12SW is an Omron Automation and Safety pushbutton switch featuring DPDT (Double Pole Double Throw) circuitry with illumination capability. This component is designed for panel-mount, snap-in installation with a rectangular white button actuator and white LED illumination. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity for applications requiring this switch configuration.

Substiute Parts

A3SJ-90D1-12SW

Omron Automation and SafetyIn Stock: 962A3SJ-90D1-12SW Datasheet

Current PartRFQ

A3SJ-90D1-12EW

Omron Automation and SafetyIn Stock: 797A3SJ-90D1-12EW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the A3SJ-90D1-12SW is determined by strict equivalence across the following critical parameters:

• Circuit configuration (DPDT)
• Mounting method (Panel Mount, Snap-In)
• Current and voltage ratings (3A AC @ 125V, 2A DC @ 30V)
• Illumination type and color (LED, White)
• Actuator geometry (Rectangular, Button)
• Termination style (Quick Connect - 0.110")
• Panel cutout dimensions (22.40mm x 16.20mm)
• Operating temperature range (-10°C ~ 50°C)
• Mechanical and electrical life (100,000 Cycles)
• Ingress protection rating (IP00)

The primary distinction between the main part and its substitute relates to illumination voltage specification and product status. The A3SJ-90D1-12EW is the manufacturer-recommended equivalent, classified as an active product with current production status.

Parameter Comparison

Engineering Selection Recommendations

The A3SJ-90D1-12EW is the direct manufacturer-recommended substitute for the obsolete A3SJ-90D1-12SW. Both components maintain identical electrical performance characteristics, mechanical specifications, and physical form factors. The substitute part carries active product status, ensuring ongoing availability and manufacturing support from Omron Automation and Safety.

The illumination voltage specification differs between the two parts: the original specifies 12 VAC/DC operation, while the substitute specifies 12 VDC operation. This distinction requires circuit-level evaluation to confirm compatibility with existing illumination power supplies. In applications where the illumination circuit supplies 12 VDC exclusively, the A3SJ-90D1-12EW provides direct functional equivalence. In applications requiring 12 VAC illumination capability, circuit modification or alternative sourcing may be necessary.

All other parameters—circuit configuration, current ratings, voltage ratings, mechanical life, electrical life, and physical dimensions—remain unchanged between the two parts, supporting direct substitution in mechanically and electrically compatible applications.

Frequently Asked Questions (FAQ)

Q: Can the A3SJ-90D1-12EW be used as a direct replacement for the A3SJ-90D1-12SW?

A: The A3SJ-90D1-12EW is functionally equivalent to the A3SJ-90D1-12SW across all electrical and mechanical parameters. The primary consideration is the illumination voltage specification: the substitute operates on 12 VDC, while the original specified 12 VAC/DC. Confirm your illumination power supply voltage before substitution.

Q: What are the critical parameters that define substitution eligibility?

A: Substitution eligibility is determined by equivalence in circuit configuration (DPDT), mounting method (Panel Mount, Snap-In), current and voltage ratings (3A AC @ 125V, 2A DC @ 30V), illumination type (LED, White), actuator geometry (Rectangular, Button), termination style (Quick Connect - 0.110"), and panel cutout dimensions (22.40mm x 16.20mm).

Q: Why is the A3SJ-90D1-12SW classified as obsolete?

A: The A3SJ-90D1-12SW is no longer in active production. The A3SJ-90D1-12EW represents the current active equivalent from Omron Automation and Safety, offering the same functional performance with ongoing manufacturing support.

Q: Are the panel cutout dimensions identical between both parts?

A: Yes. Both the A3SJ-90D1-12SW and A3SJ-90D1-12EW require a rectangular panel cutout of 22.40mm x 16.20mm, ensuring mechanical compatibility in existing panel installations.

Q: What is the difference between 12 VAC/DC and 12 VDC illumination voltage?

A: The original part (A3SJ-90D1-12SW) accepts illumination power at either 12 VAC or 12 VDC. The substitute part (A3SJ-90D1-12EW) accepts illumination power at 12 VDC only. Verify your illumination circuit supplies 12 VDC before substitution.