EL817(S)(TB)-V

Output Type:	Transistor
Supplier Device Package:	4-SMD
Package / Case:	4-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	200mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	50mA
Voltage - Output (Max):	35V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	4µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	600% @ 5mA
Current Transfer Ratio (Min):	50% @ 5mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Introduction

The EL817(S)(TB)-V is an optoisolator transistor with photovoltaic output commonly used in various electronic circuits. Optoisolators are electronic components specially designed to provide electrical isolation between input and output terminals, thereby protecting sensitive components from adverse electrical influences. EL817(S)(TB)-V optoisolators contain a light-emitting diode (LED) and a phototransistor, hence their name “optoisolator”. They use light to transmit the signal from one side to the other, allowing for complete electrical isolation between input and output.

Application

EL817(S)(TB)-V Optoisolators are widely used in industrial electronics, automotive electronics, consumer electronics, and other circuit-based applications. In industrial electronics, for example, they are used to provide electrical isolation in process control systems, allowing the different components such as sensors, controllers, actuators, and switches to communicate while protecting sensitive components from external voltage spikes. In automotive electronics, EL817(S)(TB)-V optocouplers provide electrical isolation between the vehicle’s various ECUs. This allows for signals to be transmitted between modules while protecting the vehicle’s sensitive electronics from adverse electrical influences. It also provides protection against the possibility of a short circuit between two ECUs. In consumer electronics, EL817(S)(TB)-V Optoisolators are used to provide electrical isolation between components of a device and the user. This adds a protection against electrical shocks in the case of a malfunction of the appliance.

Working Principle

EL817(S)(TB)-V Optoisolators work by using two components, a light-emitting diode (LED) and a phototransistor. The LED is used to convert electrical energy into light energy, which is then transmitted to the phototransistor. The phototransistor detects the light energy and converts it back into an electrical signal. This process is what provides the electrical isolation between the input and output terminals, as the light energy is not capable of carrying electrical current, so any voltage or current spikes on the input side will not be transmitted to the output side. Hence, the EL817(S)(TB)-V Optoisolator provides a protection against electrical influences that would otherwise affect sensitive components.

Conclusion

In conclusion, EL817(S)(TB)-V optoisolators are used in a wide range of applications to provide electrical isolation between various components and to protect sensitive components from adverse voltage and current spikes. With the help of the LED and phototransistor, they enable the transmission of signals while ensuring protection from external electrical influences.

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