CD4825W3UH

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Solid State Relays (SSRs) are becoming increasingly popular for providing reliable control of various electrical loads. The CD4825W3UH is no exception. It is designed to be used in applications such as home automation, lighting control, industrial process control, motor control, HVAC systems, and other industrial applications.

The CD4825W3UH is a single-channel, zero-cross, AC output, solid-state relay. This type of SSR is characterized by its zero-cross switching capability, which helps to reduce EMI/EMC interference while providing a quiet and stable operation. The zero-crossing feature is especially valuable when controlling inductive-load applications such as motors and solenoids. The CD4825W3UH has an extended temperature range of -20°C to + 70°C, which makes it suitable for use in harsher environments.

The working principle of the CD4825W3UH is based on the opto-coupler principle. The input side of the relay consists of two opto-isolators connected in series. The output side of the relay is isolated from the control side. The SSR\'s internal circuitry consists of power MOSFETs connected in series with the loads. An optical isolator is used to detect the zero-crossing point on the AC waveform and then to switch the power MOSFETs on/off accordingly.

The CD4825W3UH is a multi-function relay which is designed for either manual or automatic control of AC loads. The manual control requires a remote control switch or relay output from a controller. The automatic control is provided by an internal adjustable timer that intermittently opens and closes the relay contacts. The timer settings can be programmed using a dip switch on the CD4825W3UH.

The CD4825W3UH is UL 508 and IEC 60950 certified. It has a power rating of 25A at 250VAC and offers short-circuit protection. It also includes an LED indicator to indicate when the relay is in an ON state. The SSR is connected between the power supply and the load using screw terminals. This makes it easy to install and maintain. The CD4825W3UH is a versatile and reliable relay that can be used for a variety of applications.

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