4N35 IC – Optocoupler Phototransistor IC

The 4N35 Optocoupler is a versatile component used for isolating two circuits electrically while allowing data or signals to pass between them. It consists of a gallium arsenide infrared LED that drives a silicon NPN phototransistor. This configuration enables the device to provide high-voltage electrical isolation (1.5 kV, 2.5 kV, or 3.55 kV rating) between the input and output circuits.

  Features:  

• Gallium-Arsenide-Diode Infrared Source Optically Coupled to a Silicon NPN Phototransistor
• High Direct-Current Transfer Ratio
• High-Speed Switching (tr = 7 µs, tf = 7 µs Typical)
• Input-to-Output Peak Voltage (8-ms Half Sine Wave): 3.55 kV
• Input-to-Output Root-Mean-Square Voltage (8-ms Half Sine Wave): 2.5 kV
• Collector-Base Voltage: 70 V
• Collector-Emitter Voltage: 30 V
• Emitter-Base Voltage: 7 V
• Input-Diode Reverse Voltage: 6 V
• Input-Diode Forward Current: Continuous 60 mA
• Typical Applications Include Remote Terminal Isolation, SCR and Triac Triggers, Mechanical Relays, and Pulse Transformers

  Specifications:  

• Reverse Voltage (VR): 6 V
• Forward Current (IF): 60 mA
• Surge Current (IFSM): 2.5 A
• Power Dissipation (Pdiss): 100 mW
• Collector-Emitter Breakdown Voltage (VCEO): 70 V
• Emitter-Base Breakdown Voltage (VEBO): 7 V
• Collector Current (IC): 100 mA

  Applications:  

• AC Mains Detection
• Reed Relay Driving
• Switch Mode Power Supply Feedback
• Telephone Ring Detection
• Logic Ground Isolation
• Logic Coupling with High-Frequency Noise Rejection

  Package Includes:  

• 1 x 4N35 Optocoupler IC