H11AA1 Transistor Output Optocoupler IC DIP 6 Package

H11AA1 Transistor Output Optocoupler IC DIP 6 Package

The H11AA1 is an AC-input transistor optocoupler designed especially for detecting AC mains voltage and providing electrical isolation between high-voltage AC lines and low-voltage logic circuits.
It contains two anti-parallel input LEDs, allowing it to sense both half-cycles of AC signals, and a phototransistor output that delivers a logic-level signal corresponding to the AC voltage presence.
This makes it ideal for zero-cross detection, AC line monitoring, and microcontroller-based AC power control.

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Features

• AC input optocoupler with dual anti-parallel LEDs
• Detects both positive and negative cycles of AC signals
• High isolation voltage (typically 5 kV RMS)
• Transistor output for easy interface with digital circuits
• Low input current requirement
• Compatible with microcontrollers, PLCs, and logic circuits
• DIP-6 through-hole package
• Reliable operation in industrial and noisy environments

Applications 

• AC mains voltage detection
• Zero-cross detection circuits
• AC load monitoring and control
• AC frequency measurement
• Power line sensing in home automation
• Isolated AC?logic signaling
• Safety isolation in industrial controllers
• Triac-based dimmer and motor control circuits
• Over/under-voltage detection in AC lines
• Signal isolation in AC-powered equipment