4N36S(TB)

Output Type:	Transistor with Base
Supplier Device Package:	6-SMD
Package / Case:	6-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	300mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	--
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	10µs, 9µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	100% @ 10mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Optoisolators is a transmitter-receiver type data communication system, which isolates the direct electrical connection between the two devices. It helps to prevent any electrical noise and interference from affecting one device that may eventually harm the other. The optoisolator, also known as an optocoupler, uses an optical input for transmitting information and an electrical output for receiving information. It is a widely used electronic component and its applications span across industrial, commercial, automotive and medical purposes. One of the popular optocoouplers is the 4N36S (TB), with a good performance and relatively inexpensive price tag. This article will discuss the application fields and working principles of 4N36S (TB).

4N36S (TB) Application Fields

The 4N36S (TB) optoisolator is used in applications that require inputs such as logic and digital signals, which need to be converted into a corresponding output. These include, but not limited to, unidirectional powering circuits, PWM (pulse-width modulation) driving circuits, detecting circuits and frequency converters. The optoisolator also helps in isolating the operating voltages in the circuits to prevent interference.The 4N36S (TB) optoisolator is also used in HID (high-intensity discharge) lamps that are used for lighting in cars and applications that require LED lighting. It also finds application in medical equipment and hospital systems, where it forms an essential part of detecting and displaying relevant information regarding patient health conditions.

Working Principle

The 4N36S (TB) optoisolator showcases a simple working principle. It consists of a monolithic integrated circuit die that is mounted inside a small package, having two co-axial pins. The pins consist of a ‘base’ and an ‘emitter’. It also contains a high wattage lamp inside the package. The die contains a photodiode that absorbs the light emitted from the lamp, and converts it to a corresponding electrical response in the form of an output voltage. This output voltage is dependent on the intensity of the input signal, and is usually less than 1/10th that of the original input.The four pins on the optoisolator act as the transistors between the input and the output signals, to prevent any electrical noise and interference from affecting the output. The two co-axial pins connect the base and collector of the optoisolator while the second two pins connect the output terminals.

Conclusion

Optoisolators are one of the most widely used components in modern electronic devices, and the 4N36S (TB) crystal-type optoisolator is especially popular due to its good performance and low price. It is used in a variety of applications ranging from unidirectional power supplies to HID lamps, LED lighting and medical equipment. The working principle of the optoisolator is fairly simple, involving the conversion of the input optical signal to an output electrical signal.

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