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The QTC H11L3 is a phototransistor optocoupler designed for signal isolation and switching applications. Below are the manufacturer specifications, descriptions, and features:

Manufacturer Specifications:

• Isolation Voltage: 5,000 Vrms
• Collector-Emitter Voltage (VCEO): 70 V
• Emitter-Collector Voltage (VECO): 7 V
• Collector Current (IC): 50 mA
• Power Dissipation (PD): 100 mW
• Current Transfer Ratio (CTR): 50% (min) at IF = 5 mA, VCE = 5 V
• Response Time (tON/tOFF): 4 μs / 3 μs (typical)
• Operating Temperature Range: -55°C to +110°C

Description:

The H11L3 is a high-speed optocoupler featuring a gallium arsenide (GaAs) infrared LED optically coupled to a silicon phototransistor. It provides electrical isolation between input and output circuits, making it suitable for noise suppression, signal transmission, and digital logic interfacing.

Features:

• High-Speed Switching (suitable for digital applications)
• High Isolation Voltage (5,000 Vrms)
• Compact 6-Pin DIP Package
• Wide Operating Temperature Range
• Low Input Current Requirement
• Reliable Signal Isolation

This optocoupler is commonly used in industrial controls, power supplies, and communication systems where electrical isolation is critical.

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