LVD75D40

Series:	LVD
Packaging:	Bulk
Part Status:	Active
Mounting Type:	Chassis Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	DC
Voltage - Input:	23 ~ 24VDC
Voltage - Load:	3V ~ 75V
Load Current:	40A
On-State Resistance (Max):	15 mOhms
Termination Style:	Screw Terminal
Package / Case:	Hockey Puck
Supplier Device Package:	--

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Solid State Relays are devices that use a combination of electronics and electromagnetics. They are normally used in applications where electrical and magnetic isolation is required, or to prevent short circuiting, and have significant advantages over traditional relays.The LVD75D40 is an optically Isolated and Zero Voltage Turn-On Solid State Relay, made of four main components: a light-emitting diode (LED), a light sensor (photodetector), a power MOSFET and a zero-cross detector. The device is designed for switching and isolating applications that require reliable, long life performance. It is designed to provide high current and voltage ratings, and it has a wide operating temperature range for a variety of applications.The LVD75D40 is mainly used in industrial automation, medical, test and measurement equipment, in motor controllers, and in various circuit protection devices. It is suitable for a wide range of switching and controlling operations with load currents up to 30A. The device has a wide operating temperature range (-20 to +100°C) and low leakage current, as well as a low operating voltage and low propagation delay (<10µs). Additionally, the LVD75D40 uses optically-coupled connections to provide high-level electrical isolation, making it ideal for switching or controlling operations in high-voltage circuits.The main working principle of the device is based on the generation of electric current by the light-emitting diode (LED). The LED generates a beam of light that passes through the optical window of the photodetector to create an electrical current. The photodetector then sends a signal to the zero-cross detection circuit which triggers the power MOSFET, turning the relay on. The power MOSFET then amplifies the current and switches the load.To turn off the relay, the LED is turned off, causing the photodetector to stop emitting current. This stops the power MOSFET from switching the load. Then a reverse current is generated across the LED/photodetector, creating a reverse voltage that turns the relay off. This ensures that the relay is power-safe and eliminates any possibility of short-circuiting.In summary, the LVD75D40 is an optically Isolated and Zero Voltage Turn-On Solid State Relay that is used in a wide range of applications. It is designed to provide reliable, long life performance in motor controllers, industrial automation, test and measurement equipment, and various circuit protection devices, and it has a wide operating temperature range for a variety of applications. The device provides high current and voltage ratings, and its optically coupled connections offer high-level electrical isolation. Its main working principle is based on the generation of electric current by an LED that passes through the optical window of the photodetector and triggers a power MOSFET, switching the load on and off.

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