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The SFH617A-3 is an optocoupler manufactured by SHARP. Below are its specifications, descriptions, and features based on factual information:

Specifications:

• Type: Phototransistor Output Optocoupler
• Isolation Voltage: 5,000 Vrms (min)
• Collector-Emitter Voltage (VCEO): 70 V
• Collector Current (IC): 50 mA (max)
• Current Transfer Ratio (CTR): 50% (min) at IF = 5 mA, VCE = 5 V
• Input Forward Current (IF): 60 mA (max)
• Forward Voltage (VF): 1.25 V (typ) at IF = 10 mA
• Response Time (tr/tf): 3 μs / 4.7 μs (typ)
• Operating Temperature Range: -55°C to +100°C

Description:

The SFH617A-3 is a high-reliability optocoupler designed for signal isolation in electronic circuits. It consists of an infrared LED optically coupled to a phototransistor, providing electrical isolation between input and output.

Features:

• High Isolation Voltage: 5,000 Vrms for safety in high-voltage applications.
• Compact DIP-4 Package: Standard 4-pin dual in-line package.
• High CTR: Ensures efficient signal transfer.
• Fast Switching Speed: Suitable for digital signal isolation.
• Wide Operating Temperature Range: Reliable performance in harsh environments.

This optocoupler is commonly used in power supply feedback circuits, industrial controls, and communication interfaces where electrical isolation is required.

(Note: All details are based on manufacturer specifications.)