1.5KE120CATR

TVS- Diodes – 1.5KE120CATR Application Field and Working Principle

TVS- Diodes are an important type of overvoltage protection components that has been recently designed to protect electrical circuits from transient voltage events in order to Safety First. The 1.5KE120CATR type of TVS-Diodes is part of a new family of ultra-low capacitance and fast-acting transient suppressors that offer excellent ESD protection. They are a must for applications where lightning strikes and hazardous transients are more common.

Transient Voltage Suppressors (TVS) are dropper diodes having the capability to conduct large amount of current at reverse and normal voltage. The main purpose of such fourth generic device category is to protect sensitive components from higher than normal voltage. 1.5KE120CATR is one of the latest offerings in the dropper diode family and is known for its ability to absorb and dissipate pulse and spike currents up to 1500 watts.

The 1.5KE120CATR is especially designed for low capacitance load, high DC power levels, and signal levels up to 6.5V across a wide range of operational frequencies. It has an ultra-low capacitance of 1.50pF, and is rated for surge capability of up to +/-40V (for ESD protection). The device promises a fast response time of less than one nanosecond, and operates in a wide temperature range from -55 degrees Celsius to 125 degrees Celsius. The 1.5KE120CATR also features a low leakage current of less than 5 microamperes.

The 1.5KE120CATR transient voltage suppressors offer ideal protection solutions for automotive and RF applications. They are widely used in protection circuits for AC/DC power supplies and digital devices, such as televisions, computers and consumer electronics products. They are used to protect sensitive components from voltage transients that exceed the specified operating voltage.

The device works under the principle of avalanche breakdown, where, an abrupt increase in reverse bias voltage results in creation of a large number of electron-hole pairs and subsequent jump in reverse current. The avalanche breakdown occurs at a fixed voltage level, known as its breakdown voltage, which is called the clamping voltage.

When a small or high voltage transient event occurs, the voltage across the 1.5KE120CATR is increased thereby dropping the voltage across the protected load. This prevents over-voltage from reaching the protected load or circuit, thus providing over-voltage protection. The device also features a thermal disconnect, which allows it to disconnect itself from the circuit if the surge current is too high.

In summary, the 1.5KE120CATR is a fast response, low capacitance, and high reliability transient voltage suppression diode designed to protect sensitive electronics from over-voltage transients. It offers excellent protection for automotive, RF, and power supplies, and is used in a wide variety of consumer and industrial applications.