FOD617B300

Output Type:	Transistor
Supplier Device Package:	4-DIP
Package / Case:	4-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	50mA
Voltage - Forward (Vf) (Typ):	1.35V
Current - Output / Channel:	50mA
Voltage - Output (Max):	70V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	4µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	125% @ 10mA
Current Transfer Ratio (Min):	63% @ 10mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Obsolete
Packaging:	Tube

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Optoisolators - Transistor, Photovoltaic Output - FOD617B300 Application Field and Working PrincipleAn opto-isolator, also known as an opto-coupler, opto-switch, photocoupler or gallium arsenide diode, is a component that can be used to provide electrical isolation between two parts of a circuit. Opto-isolators are widely used in industrial applications to protect circuits from electromagnetic interference (EMI), eliminate ground loops and facilitate communication between circuits operating at different voltages. This article will discuss the application fields and working principles of the FOD617B300 opto-isolator.The FOD617B300 is an opto-isolator from Fujitsu consisting of a light emitting diode (LED) and a phototransistor. The LED is a gallium arsenide (GaAs) chip internally combined with a light-shielded PCA. This LED is powered by an input voltage and generates infrared light to activate the phototransistor. The FOD617B300 is available in a small 8-pin DIP (Dual In-line Package) and has operating temperature ranges of -40° to +85°C. The FOD617B300 is mainly used for signal isolation and switching purposes, such as in power supplies, computers, instrumentation, industrial controllers and automation equipment. It supports input voltages of 0-35VAC and 0-75VDC, and has CTR (current transfer ratio) up to 200%. It provides input-output isolation voltage of 3000Vrms, with the LED die connected to the ground of the input circuit.The most obvious application of the FOD617B300 is as a relay replacement, but it can also be used to control electronic ballasts, linear solenoid actuators and other motors. It has a long life span and can be used in noisy and harsh environments where electrical isolation is needed.To understand how the FOD617B300 works, we must first understand the basic principles of opto-isolators. An opto-isolator works by creating an electrical barrier between two pieces of circuitry. The opto-isolator contains two components: a light source and a phototransistor. When the light source is turned on, it emits light into a translucent device filled with liquid crystals that are sensitive to the wavelength of the light. The light activates the phototransistor, which then produces an electric current. Because the light does not physically connect the two pieces of circuitry, the electrical barrier prevents any EMI or ground-loop currents from crossing between the two sections of the circuit.The FOD617B300 uses a GaAs LED to activate the phototransistor. The LED is powered by an input voltage and emits infrared light that activates the phototransistor, producing an electrical current. The current is then delivered to the output side through the transistor, isolating the input and output circuits and creating an electrical barrier between them. The FOD617B300 also has an insulated output with no common-mode current, meaning that the output will not be affected by any external noise.The FOD617B300 opto-isolator is an excellent solution for a variety of applications which require electrical isolation. Its compact size and reliable operation make it a popular choice for industrial applications, and its insulation voltage means it is suitable for use in a variety of environments. In addition, its long life span and robustness mean that it will provide reliable service for years to come.

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