CD421490B

Thyristors - SCRs - Modules

CD421490B is an advanced, semi-controlled AC switch that can handle any AC voltage. This type of device is the best choice for high power applications, such as transformers, motors, and relay-off controls for AC devices and other inductive loads.

Application Field

The CD421490B offers high degree of controllability in a number of applications, starting from simple motor speed control, fast control of low and AC switching, high power switching of AC, and protection of equipment from external factors. This device is widely used in industrial equipment, home appliances, and commercial power control systems.

It is also used in routing systems such as heatsinks and bumpers, process control, lighting control and dimming systems. This device is also used in voltage regulator systems and many other variable technologies and applications.

Working Principle

The CD421490B is an AC switch based on the AOI mechanism, using the SCR principle to convert AC current into DC current. It is made up of two semiconductor chips: one is the control device, the other is the switching device. The control device consists of four components: two heavy diodes for the collector, an anode (anode) and a positive second gate (P+G).The switching device comprises two transistors, one of which is connected to the first gate (F-G) and the other to the anode. When an external control signal is applied to the control device, the current is changed and the switching device is then activated.

The CD421490B will then can now operate as a semi-controlled AC switch by controlling the amount of current flowing through it, which in turn will affect the timing of the cutting and switching of the AC current. The device can be controlled over a wide range, and it has a very high speed of response. Its operation parameters are adjustable in order to achieve optimal performance.

The CD421490B offers excellent electrical insulation and long-term reliability, thanks to its improved protection against overloads, surges, and other electrical disturbances. It is also an environment-friendly device due to its low power consumption and reduced power loss.

The CD421490B is a versatile device capable of performing AC switching tasks in a variety of applications. It is an ideal device for high power applications, with its superior performance, reliability, and affordability.