SFH615AY-X018T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Number of Channels:	1
Voltage - Isolation:	5300Vrms
Current Transfer Ratio (Min):	50% @ 5mA
Current Transfer Ratio (Max):	150% @ 5mA
Turn On / Turn Off Time (Typ):	2µs, 25µs
Rise / Fall Time (Typ):	--
Input Type:	DC
Output Type:	Transistor
Voltage - Output (Max):	70V
Current - Output / Channel:	50mA
Voltage - Forward (Vf) (Typ):	1.25V
Current - DC Forward (If) (Max):	60mA
Vce Saturation (Max):	400mV
Operating Temperature:	-55°C ~ 100°C
Mounting Type:	Surface Mount
Package / Case:	4-SMD, Gull Wing
Supplier Device Package:	4-SMD

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Introduction
SFH615AY-X018T is an optoisolator which falls to the category of Transistor, Photo-voltaic Output. An optoisolator is nothing but an optical data transfer device which utilizes a transmitter and a receiver functioning on optoelectronics to pass a signal from one electronic circuit to another without any electrical connection.SFH615AY-X018T Application Field and Working Principle
SFH615AY-X018T can be used in wide range of application fields like industrial automation, consumer electronics, and telecommunications. It functions on the principle of transmitting electrical signals through an optical signal.The SFH615AY-X018T optoisolator is composed of an infra-red LED which acts as the light transmitter, a phototransistor which acts as the light receiver and two resistors which act as a buffer. The LED is driven through a circuit which is galvanically isolated from the input. The light generated by the LED is received by the phototransistor and converted to an electrical current. The electrical current is passed through the two resistors which adjust the impedance of the circuit so that it is not affected by the incoming input signal. The current then passes through the output side of the optoisolator.The input resistance of the SFH615AY-X018T optoisolator is adjustable to ensure that the input electrical signal is transferred across without any distortion. In comparison to mechanical relays, the optoisolators have better protection from voltage and current fluctuations. This advantage helps them last longer than the mechanical relays without experiencing any breakdowns.Conclusion
SFH615AY-X018T optoisolator has a wide application field and is beneficial to industries as it provides better protection from voltage and current spikes. Its working principle involves conversion of electrical signal to an optical signal and then between the transmitter and the receiver. The adjustable input resistance helps in balancing the impedance of the circuit.

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