Omron A3SA-90C1-12SR Equivalent & Substitute Parts

Part Overview

The Omron A3SA-90C1-12SR is a pushbutton switch with DPDT circuit configuration, designed for illuminated panel mount applications with snap-in installation. This component features a red square button actuator with red LED illumination powered at 12 VAC/DC. The part is classified as obsolete, making identification of active equivalent models necessary for ongoing procurement and system maintenance.

Key Parameters

Parameter	Value
Manufacturer Part Number	A3SA-90C1-12SR
Manufacturer	Omron Automation and Safety
Series	A3S
Circuit Configuration	DPDT
Switch Function	On-Mom
Current Rating (AC)	3A
Current Rating (DC)	2A
Voltage Rating - AC	125 V
Voltage Rating - DC	30 V
Mounting Type	Panel Mount, Snap-In
Actuator Type	Square, Button
Actuator Color	Red
Illumination Type	LED, Red
Illumination Voltage	12 VAC/DC
Termination Style	Quick Connect - 0.110" (2.8mm)
Panel Cutout Dimensions	Square - 16.20mm x 16.20mm
Operating Temperature Range	-10°C ~ 50°C
Mechanical Life	1,000,000 Cycles
Electrical Life	100,000 Cycles
Ingress Protection	IP00
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the A3SA-90C1-12SR is determined by strict equivalence across the following critical parameters:

Circuit configuration (DPDT)
Switch function (On-Mom)
Current and voltage ratings (3A AC / 2A DC; 125V AC / 30V DC)
Mounting type (Panel Mount, Snap-In)
Actuator type and color (Square Button, Red)
Illumination specification (LED, Red, 12V)
Termination style (Quick Connect - 0.110")
Panel cutout dimensions (16.20mm x 16.20mm square)
Operating temperature range (-10°C ~ 50°C)
Mechanical and electrical life ratings (1,000,000 / 100,000 cycles)
Ingress protection rating (IP00)

Only components matching all these parameters across the A3S series are classified as direct substitutes.

Parameter Comparison

Parameter	A3SA-90C1-12SR (Main)	A3SA-90C1-12ER (Substitute)
Manufacturer Part Number	A3SA-90C1-12SR	A3SA-90C1-12ER
Series	A3S	A3S
Product Status	Obsolete	Active
Circuit Configuration	DPDT	DPDT
Switch Function	On-Mom	On-Mom
Current Rating (AC)	3A	3A
Current Rating (DC)	2A	2A
Voltage Rating - AC	125 V	125 V
Voltage Rating - DC	30 V	30 V
Mounting Type	Panel Mount, Snap-In	Panel Mount, Snap-In
Actuator Type	Square, Button	Square, Button
Actuator Color	Red	Red
Illumination Type	LED, Red	LED, Red
Illumination Voltage	12 VAC/DC	12 VDC
Termination Style	Quick Connect - 0.110" (2.8mm)	Quick Connect - 0.110" (2.8mm)
Panel Cutout Dimensions	Square - 16.20mm x 16.20mm	Square - 16.20mm x 16.20mm
Operating Temperature Range	-10°C ~ 50°C	-10°C ~ 50°C
Mechanical Life	1,000,000 Cycles	1,000,000 Cycles
Electrical Life	100,000 Cycles	100,000 Cycles
Ingress Protection	IP00	IP00

Engineering Selection Recommendations

The A3SA-90C1-12ER is the direct active equivalent for the obsolete A3SA-90C1-12SR. Both components are members of the Omron A3S series and maintain identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status: the A3SA-90C1-12SR is obsolete, while the A3SA-90C1-12ER is active and currently available for procurement.

The illumination voltage specification differs in notation only: the main part lists 12 VAC/DC while the substitute lists 12 VDC. This represents a functional narrowing from dual-voltage capability to DC-only operation. Applications requiring AC illumination voltage should be evaluated against this specification change.

For new designs and ongoing production requiring this switch configuration, the A3SA-90C1-12ER is the appropriate selection based on active product status and full parameter equivalence.

Frequently Asked Questions (FAQ)

Q: Can the A3SA-90C1-12ER directly replace the A3SA-90C1-12SR in existing applications?

A: Yes, the A3SA-90C1-12ER is a direct substitute for all electrical and mechanical functions. Both components share identical circuit configuration (DPDT), current ratings (3A AC / 2A DC), voltage ratings (125V AC / 30V DC), mounting specifications, and panel cutout dimensions. The components are mechanically and electrically interchangeable.

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

A: The A3SA-90C1-12SR specifies 12 VAC/DC illumination voltage, indicating dual-voltage capability. The A3SA-90C1-12ER specifies 12 VDC illumination voltage only. Applications currently using AC illumination should confirm compatibility with DC-only operation before substitution.

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

A: No. Both components specify identical mechanical life (1,000,000 cycles) and electrical life (100,000 cycles), ensuring equivalent durability and operational longevity in panel mount applications.

Q: Why is the A3SA-90C1-12SR classified as obsolete?

A: The A3SA-90C1-12SR has been discontinued by Omron Automation and Safety. The A3SA-90C1-12ER is the active replacement model within the A3S series, maintaining full functional equivalence while providing current availability and ongoing manufacturer support.

Q: Are the panel cutout dimensions identical?

A: Yes. Both components require a square panel cutout of 16.20mm x 16.20mm, ensuring identical mechanical fit and installation compatibility in existing panel designs.

Q: What termination style do these components use?

A: Both components use Quick Connect termination with 0.110" (2.8mm) connectors, providing identical electrical connection compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message