P4SMA120C

TVS diodes are generally used to protect electronic circuits from overvoltage transients (such as electrostatic discharge and electrical storms) and their related destruction. The P4SMA120C is a bi-directional unidirectional (transient voltage suppressor) TVS diode. It is designed to protect sensitive components and systems from electrostatic discharge or transient voltage surges. It has a maximum transient maximum peak pulse power dissipation of 600W (8/20us) and a 5% maximum peak pulse current of 1.0A.

P4SMA120C structure is designed to provide maximum protection when exposed to transient voltage surges. It has a dual or dual-level zener breakdown region and a positive or negative surface breakdown region, which form a “dual protection wall”. This dual protection walls effectively protects the connected circuit from overvoltage transients. During normal operation, the diode does not offer any forward (DC) bias. The P4SMA120C is also available in a number of different package sizes, perfect for meeting a variety of design needs.

The working principle of P4SMA120C is that in the event of a voltage spike, the diode conducts the surge current to the ground, clamping the voltage level so that it does not exceed the breakdown voltage. In the unidirectional mode, the diode functions like a normal rectifier diode and prevents reverse current from flowing. The diode can also provide short-circuit protection for the overcurrent condition when connected in the balanced mode. The P4SMA120C can operate within a wide temperature range, from -55°C to +85°C, with reverse leakage current less than 5µA.

P4SMA120C is commonly used in automotive systems, industrial systems, and consumer electronics. It provides overvoltage protection for devices like Microcontrollers, Digital Signal Processors, FPGAs, Video Amplifiers, Frequency Detectors, and Gate Drivers, to name a few. The diode is often used in combination with an integrated circuit like a comparator, which can turn on a "turboflag" overvoltage safeguard. This combination allows for larger surge protection and even diagnostic capabilities.

In summary, P4SMA120C is an excellent choice of protection for electronic systems subject to transients. Its dual protection wall offers reliable protection from overvoltage transients, while its wide operating temperature range and low reverse leakage current make it suitable for use in a variety of applications.