AQY412EHA

AQY412EHA is a Panasonic AQY-series PhotoMOS relay (optically isolated MOSFET relay). It uses an input LED to optically trigger a MOSFET output, providing an isolated, solid-state switch.
- Configuration: 1 Form A normally-open contact; suitable for AC or DC switching within its rated load.
- Isolation and durability: High input–output isolation (several kV RMS typical); no mechanical contacts, so no wear or arcing; long life and fast switching.
- Performance cues: Low leakage in the OFF state and low on-resistance when ON; driven by a small LED current; comes in a compact surface-mount package.
- Applications: Signal isolation and switching for microcontrollers, instrumentation, and control circuits.
- Note: Exact numbers (load voltage/current, LED drive current, isolation rating, package) vary by variant. Check the datasheet for AQY412EHA for precise specifications.

I don’t want to guess—please provide the AQY412EHA datasheet or key specs (max load voltage, load current, on‑resistance, package/type). With those I can list direct equivalents (same ratings and pinout) and close substitutes from Panasonic, Toshiba, Sharp, IXYS, etc.

AQY412EHA is a Panasonic PhotoMOS relay. Key features:
- 1 Form A (normally open) MOSFET output
- Optical isolation between input LED and output (high isolation voltage, ~5 kV RMS)
- No mechanical contacts: solid-state, silent, long life
- Low input drive current required (easy microcontroller interface)
- Bidirectional load switching with low on-resistance
- Fast switching capability; suitable for AC/DC loads
- Wide operating temperature and robust electrical characteristics
- RoHS-compliant; available in compact SMD/through-hole packages
- Suitable for signal isolation and lightweight power switching
Note: For exact load voltage/current ratings and package options, please consult the datasheet.

AQY412EHA is a 4-pin PhotoMOS (solid‑state) relay.
Pin functions:
- Pin 1: LED anode (input +)
- Pin 2: LED cathode (input −)
- Pin 3: MOSFET output terminal 1 (load)
- Pin 4: MOSFET output terminal 2 (load)
Function: an optically‑isolated, low‑level electronic switch — the input LED drives an internal MOSFET pair to switch the output/load (used for isolated DC/AC signal switching).

- Manufacturer: Panasonic (Panasonic Corporation).
- What kind of company: A Japanese multinational electronics manufacturer and technology conglomerate (formerly Matsushita Electric Industrial Co., Ltd.), producing consumer electronics, components (like optocouplers), sensors, automotive and industrial electronics, and other technology products.

AQY412EHA is a PhotoMOS relay (optically isolated MOSFET output). It provides galvanic isolation between input and output, low on-resistance, long life, and solid-state reliability—ideal for replacing mechanical relays in compact designs. Typical applications:
- Isolated I/O for microcontrollers/PLCs
- Sensor/interface and data-acquisition circuits
- Isolated drive for coils, LEDs, and small loads
- AC/DC load switching in power supplies and control systems
- Telecom and instrumentation equipment
- Automotive and consumer electronics needing galvanic isolation

SOP-4 (4-pin surface-mount) package with gull-wing leads.