4N35 (Dip-6) Photo Transistor IC - Optocoupler [Original]

4N35 Optocoupler Phototransistor IC - DIP-6, 5000Vrms Isolation

The 4N35 is an optocoupler phototransistor IC, housed in a 6-pin DIP package. It transfers signals via an integrated infrared LED and phototransistor. Electrical isolation up to 5000 Vrms protects sensitive circuits. This shields components from voltage spikes and electrical noise. Applications include signal isolation, microcontroller interfacing, and switching. It features a 3µs typical response time and 100% typical Current Transfer Ratio. The through-hole design ensures compatibility in industrial and consumer electronics.

Specifications:

• Type: Optocoupler / Phototransistor
• Package: DIP-6 (Through-Hole)
• Input LED Forward Voltage (Vf): 1.2V (typical)
• Collector-Emitter Voltage (Vce): 30V
• Current Transfer Ratio (CTR): 100% (typical)
• Isolation Voltage: 5000 Vrms
• Collector Current (Ic): 50mA max
• Response Time: 3µs (typical)
• Operating Temperature: -55°C to +100°C

Key features and benefits:

• Electrical isolation up to 5000 Vrms.
• Integrated infrared LED and phototransistor.
• Standard 6-pin DIP (Through-Hole) package.
• 3µs (typical) response time.
• Current Transfer Ratio (CTR) of 100% (typical).
• Protection against voltage spikes and electrical noise.
• Stability and long operational life.

Applications:

• Microcontroller and logic level interfacing.
• Power supply feedback and monitoring systems.
• Signal isolation and noise suppression.
• Triac and transistor triggering.
• Industrial control and automation circuits.

Frequently Asked Questions:

Q: What is the pin configuration for the 4N35 DIP-6 package?
A: The 4N35 is a 6-pin DIP package. Pin 1 is Anode, Pin 2 is Cathode, Pin 4 is Emitter, Pin 5 is Collector, Pin 6 is Base. Pin 3 is not connected.

Q: Can the 4N35 be used for AC signal isolation?
A: The 4N35 is designed for DC signal isolation. For AC applications, consider using a zero-crossing optocoupler or a suitable AC-to-DC conversion circuit before the optocoupler input.

Q: What is the maximum input current for the LED?
A: The maximum continuous forward current for the input LED is typically 60mA, with a peak forward current of 3A (1µs pulse width, 300 pps).

Q: Is the 4N35 compatible with 3.3V logic levels?
A: Yes, the 4N35 can interface with 3.3V logic levels. Ensure the input LED forward current is within specifications and the output phototransistor is biased correctly for the 3.3V logic circuit.

Package Includes:

*Image shown is a representation only.

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