4N35-360E

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Optoisolators - Transistor, Photovoltaic Output

4N35-360E application field and working principle

The 4N35-360E is a type of optoisolator, also known as an optocoupler, photocoupler, optical isolator, and opto-isolator, which is designed to isolate two circuits electrically and transduce a signal from one to the other. It consists of a light-emitting diode (LED) which is optically coupler with a phototransistor. Specifically, it is a transistor, photovoltaic output optoisolator, with a built in protection diode allowing the device to continuously conduct up to a maximum rating of 500V.

The 4N35-360E has year be rated for an input current of 25mA. It has a collector to emitter voltage rating of 40V and an on-state collector current rating of 0.4A. It has a storage temperature between -55C and +150C, and an operating temperature range of between -40C and +85C. The 4N35-360E also has excellent CTR (current transfer ratio) from an input signal of 4.0mA at 10V, to a 10V output signal.

The 4N35-360E is mainly used in power supplies, computers, motor control circuits, and signal-level conversion of digital and analog signals. It is also able to be used as a solid-state relay. The optoisolator works by using an LED to transmit a modulated beam of light, which is received by a phototransistor, and converted into current. The light beam due to its refractive index, will not be attenuated or distorted by any external electrical force. The modulated light beam will trigger the phototransistor and generate a photocurrent in its base. The photocurrent will then be amplified by the phototransistor, and the amplified current will be outputted to the external circuitry.

In order to apply the 4N35-360E in a circuit, it is necessary to connect it to a DC power supply. The LED pin should be connected to a positive source voltage, and the collector pin to the ground. An external base resistor is needed to control the current of the LED. It should be noted that it is important to use a base resistor with a value that is between 5K and 10K ohms, in order to prevent the current from exceeding the maximum specifications of the device. Once the current is set, the LED will emit a light beam, which will trigger the phototransistor, and create electrical signals.

The 4N35-360E optoisolator is a highly efficient device which provides reliable electrical isolation between two circuits. Its advantages include its high isolation voltage, fast switching speed, low power consumption, and wide temperature range. As a result, it is one of the most widely used optocouplers in many industrial applications. It is simple to use, and very reliable.

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