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AQY212SX

AQY212SX

Panasonic Electric Works
Solid State Photo-Coupled Relay (Photorelay) SPST-NO (1 Form A) 4-SOP (0.173", 4.40mm)
Active23,592 in stock
Datasheet Digi-Key Compare Prices

Overview

The AQY212SX is a PhotoMOS solid-state relay from Panasonic's GU series, featuring an SPST-NO (1 Form A) configuration in a compact 4-pin SOP package. It utilizes an LED input to drive a MOSFET output, providing 500 mA of continuous load current with an isolation barrier that prevents electrical noise transfer. This device is capable of switching both AC and DC loads up to 60V, making it a reliable alternative to electromechanical relays in low-voltage signaling applications.

Why Choose This Part

This photorelay offers a low typical LED operate current of 0.9mA, enabling direct drive from most microcontrollers. With no mechanical contacts, it eliminates contact bounce and arcing, providing a significantly longer service life than traditional relays. The small 4-SOP footprint saves board space while maintaining a 2.5 Ohm maximum on-state resistance for efficient power transfer.

Applications

Test and Measurement Equipment
Used in automated test equipment (ATE) for signal switching where high reliability and fast response times are required.
Industrial Instrumentation
Ideal for PLC output modules and sensor interface circuits that require noise-free switching and isolation.
Security and Alarm Systems
Utilized in disaster prevention and security monitoring equipment due to its long operational life and silent operation.

Key Specifications

Circuit SPST-NO (1 Form A)
Relay Type Photo-Coupled Relay (Photorelay)
Output Type AC, DC
Load Current 500 mA
Mounting Type Surface Mount
Package / Case 4-SOP (0.173", 4.40mm)
Voltage - Load 0 V ~ 60 V
Approval Agency BSI, cURus
Voltage - Input 1.14VDC
Termination Style Gull Wing
Operating Temperature -40degC ~ 85degC
Supplier Device Package 4-SOP
On-State Resistance (Max) 2.5 Ohms

Getting Started

To implement the AQY212SX, design a current-limiting resistor for the input LED based on the 1.14V typical forward voltage and your desired drive current (typically 3mA to 5mA for reliable switching). Ensure the load does not exceed 60V and 500mA, and follow the SOP4 footprint for surface mount soldering. No external snubber circuit is typically required for resistive loads due to the solid-state MOSFET architecture.

AQY212 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Load Current Package Voltage - Input On-State Resistance (Max) Stock
AQY212SX (this part) 500 mA SOP-4 1.14V 2.5 Ohms 23,592
AQY212GHAZ 1.1 A SMD-4 1.14V 700 m 2,895
AQY212GHAX 1.1 A SMD-4 1.14V 700 m 14,508
AQY212GSX 1 A SOP-4 1.32V 700 m 4,856
AQY212GS 1 A SOP-4 1.32V 700 m 18,882
AQY212GSZ 1 A SOP-4 1.32V 700 m 7,325

Also Consider

AQY212GHAX Panasonic Electric Works - Offers a higher isolation voltage and different thermal characteristics for more demanding industrial environments.
TLP172GM Toshiba - A comparable 60V, 500mA photorelay in a similar 4-pin SO package with low trigger current requirements.