D4812

D4812 Application Field and Working Principle

Solid State Relays (SSRS) represent a large category of high-performance switching and control devices, which are suitable for a variety of application fields, ranging from automotive, industrial automation, telecommunications, medical, aviation, and consumer electronics. As one of the most common SSR series, D4812 offers unmatched performance and broader ranges of options. This article introduces its application fields and working principles.

D4812 Application Fields

The D4812 is designed around the proven and popular form factors with a few versatile options, making it suitable for a range of scenarios. The following are some of the most common fields:

• Industrial Automation: The D4812 is often combined with PLC (Programmable Logic Controller) to implement a secure and reliable automation system. Its high insulation voltage and low power consumption can meet the high reliability requirements in harsh industrial environments.
• Automotive industry: The D4812 can be used in automotive applications such as electronic control unit, airbag system and engine control system. Its superior performance ensures the reliable electric connection and signal transmission.
• Consumer Electronics: The D4812 is suited for a range of consumer electronics, such as LCD displays, remote control devices, and industrial robots. Its small size and easy installation represent an outstanding solution for single-component design.
• Medical field: The D4812 is well suited for medical devices, such as safety monitors, infusion pumps and medical imaging scanners, with higher reliability and better performance. The SSR can maintain a constant, accurate supply of power to medical devices with a minimal number of components.

D4812 Working Principles

The working principle of the D4812 solid state relay can be divided into two parts: switching control and electrical isolation. As the control part, the D4812 utilizes a semiconductor device to complete the switching. It requires only a small amount of power to control the on/off switching of high-power loads. As for the electrical isolation part, the D4812 adopts a light conducting medium for insulation, providing a strong barrier between the input signal and output load.

To switch the SSR, the input signal current typically varies between 5 mA and 20 mA, and the resistance of the load should be between 3Ω and 10Ω. When the current intensity reaches the specified threshold, the SSR will be switched on/off. Once the current intensity drops below the set threshold, the SSR will return to its initial state. The D4812 also features a LED indicator which will light up when the SSR switches on.

Conclusion

The D4812 solid state relay belongs to the SSR series, offering higher switch reliability, better performance, and a variety of application fields. It is suited for small, medium and large-scale industrial automation systems, automotive, consumer electronics, and medical devices. With its distinct working principles, the D4812 can provide effective control and electrical isolation.