D4890

Solid State Relays (SSRs) are electronic devices that use a small semiconductor to control the switching of larger currents or voltage in an electrical circuit. The D4890 is an SSR that is designed for applications where high switching performance and reliability are essential. In this article, we will discuss the application field and working principles of the D4890 type of SSR.

The D4890 type of SSR is designed for applications where fast switching and high reliability are necessary. It is typically used in industrial automation, power electronics, and consumer appliances. Additionally, it is suitable for use in motor control, heating, air conditioning, lighting control, and other process control applications. It is often chosen for power supplies, motor controllers, and switch mode power supplies.

The D4890 features a drive output of 5V DC and a load current rating of 40A. It also has an on-state voltage drop of 2V, and an on-state current dissipation of 430mW, making it ideal for applications that require low energy consumption and high power efficiency.

The working principle of the D4890 can be understood in three steps. First, an input signal is applied to the SSR. This input signal can be either AC or DC, with a voltage of up to 30V. Then the input signal is passed through the opto-isolator, which isolates the input signal from the output stage. The opto-isolator also serves as a protection mechanism against external electrical noise. Finally, the input signal is converted into an output signal which can then be used to control the on/off switching of the load.

The D4890 SSR also has several features that make it especially suitable for industrial applications. It has a LED indicator for visual monitoring of the on/off status. Additionally, it has an integrated noise filter for reducing electromagnetic interference, and a thermal shutdown feature for protection against excessive temperatures. In addition, it is UL listed, RoHS compliant, and can be operated at temperatures between -55°C and + 105°C.

In conclusion, the D4890 is a type of Solid State Relay that is designed for applications where fast switching and high reliability are essential. It has a 5V DC drive output, a load current rating of 40A, and an on-state voltage drop of 2V. Additionally, its working principle can be understood in three steps, and it has several features that make it especially suitable for industrial applications.