The Onsemi H11AA1 Octocoupler (DIP-6 package) is a high-performance optoelectronic isolation device designed to provide safe and reliable signal transfer between circuits with different voltage levels. It integrates an infrared LED input and a phototransistor output, offering superior electrical isolation for protecting sensitive low-voltage control circuits from high-voltage transients and surges.

This octocoupler is widely used in microcontroller interfacing, AC line monitoring, industrial automation, data signal isolation, LED drive circuits, and switching power supplies. Its robust design ensures excellent performance, stability, and long-term reliability in both consumer and industrial applications.

Features:

• Reliable optoelectronic isolation between input and output

• Dual LED input stage optimized for AC signal detection

• Compact DIP-6 package for easy PCB integration

• High common-mode transient immunity

• Suitable for microcontroller interfacing and automation systems

• Ideal for protecting circuits from voltage spikes and transients

Specifications:

• Brand: Onsemi

• Model: H11AA1

• Package: DIP-6

• Maximum Forward Current (IF): 60 mA

• Isolation Voltage: 5300 Vrms (input-output isolation)

• Output Type: Phototransistor

• Collector-Emitter Voltage (Vceo): 30 V

• Emitter-Collector Voltage (Veco): 7 V

• Collector Current (Ic): 50 mA

• CTR (Current Transfer Ratio): 20–400% (depending on IF, VCE conditions)

• Operating Temperature Range: -55°C to +100°C

Applications:

• Interfacing microcontrollers with AC and high-voltage circuits

• Data signal isolation in automation systems

• Zero-crossing detection and AC line monitoring

• Switching power supplies and motor control

• LED drive and sensor interfacing

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