CD4850E3VH

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Solid state relays are a type of electrical switch that uses a signal from an external control circuit to open and close an internal electrical circuit. They are widely used in industrial control and automation applications because of their small size, fast response time, reliable operation, long life and low cost. This article will discuss the application field and working principles of the CD4850E3VH solid state relay (SSR).

The CD4850E3VH is a three-channel SSR with three isolated channels that can be used to control up to three separate loads from a single controlling voltage source. It is ideal for applications such as motor controls, lighting controls, process control, heating and air-conditioning systems, and various types of linear/nonlinear control. Because the unit is mounted on a heatsink, it is well-suited for applications that require higher current loads and/or higher temperatures.

The CD4850E3VH has a wide operating voltage range from 24 VDC to 230 VAC, and its zero-cross detector ensures that the output switch is opened and closed at the zero-cross point of the AC line voltage, thus reducing inrush current. It also has an adjustable control sensitivity that allows it to be used with either digital or analog signals.

The CD4850E3VH is a low-power SSR with a maximum switching capacity of 2.1A per channel at a maximum voltage of 230VAC. It uses a bidirectional optical isolator in place of a mechanical switch, making it extremely reliable in comparison to mechanical relays. This optical isolator provides complete electrical isolation between the control circuit and the load circuit, making it ideal for applications that require voltage and current isolation.

The CD4850E3VH is designed to operate with four wire connection, consisting of a pair of control wires and a pair of load wires. An external power source is used to supply power to the relay\'s input terminals, which is then fed to the control side of the output switch. When the control signal is received, the optical isolator\'s internal LED is illuminated and this in turn triggers the output switch to open or close, depending on the control signal.

The CD4850E3VH is to meet UL, cUL, TUV and CE requirements and is RoHS compliant. It also has built-in protection features such as over-temperature protection, reverse connection protection and short-circuit protection, making it a reliable and robust device.

In conclusion, the CD4850E3VH is a high-performance, three-channel solid state relay that is suitable for a wide range of applications. It has a wide operating voltage range, adjustable control sensitivity, and built-in protection features, making it a reliable and robust device for industrial control and automation applications.

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