1.5KE220A Circuit Protection

TVS Circuit Protection: 1.5KE220A Application Field and Working Principle

TVS (Transient Voltage Suppressor) diodes are an important class of circuit protection devices used in a variety of electrical systems and devices. The 1.5KE220A is one of the most popular models of TVS diode and is widely used in the protection of electronic equipment and systems.

A TVS diode is a type of diode that is designed to protect electrical circuits from overvoltage. It works like a normal diode, except that it is designed to clamp down high voltage transients, which are short bursts of excessive voltage, and dissipate them harmlessly as heat. This eliminates the risk of damage to sensitive circuitry, which can result from such extreme voltage events.

The 1.5KE220A is a two-terminal, 400 W unidirectional voltage suppressor. It is designed for a peak pulse power of 400 W at a 10/1000 μs pulse width, and to withstand a maximum peak pulse current of 2.5 kA. The device can suppress transient voltages up to 1500V with the aid of its dynamic threshold of 16V.

The device has a working principle, which is based on the avalanche breakdown phenomenon. When a voltage transient such as a surge or spike exceeds the breakover voltage, the high electric field strength of the strong electric field within the device increases dramatically, resulting in an avalanche breakdown. This creates a shunt current path that dissipates the energy from the surge and clamps the voltage at the diode\'s breakdown voltage. The device will then re-establish its normal low conductivity state after the transient voltage has passed.

This surge protector can be used in the protection of a wide range of electronic systems, including automotive, communication, and consumer electronics. It is also commonly used in the protection of data and power ports, such as USB and HDMI, as well as other types of equipment, including AC/DC power supplies, EMS (Emergency Medical Services) systems, fire alarms, and industrial control systems.

The 1.5KE220A TVS diode provides a reliable solution for protecting systems from overvoltage transients. Its two-terminal design makes it very easy to install, and its 400 W peak pulse power rating gives it the ability to handle surges up to 1500V, while also providing excellent protection for a wide range of applications.