SA48-E3/73

A TVS diode, or Transient Voltage Suppressor, is a type of diode used to protect sensitive electronics in the event of a power surge or voltage spike. One type of such TVS diode is the SA48-E3/73, which works as an ideal over-voltage protection device for microcontrollers, PCI-Express circuits, and more. It is also an essential component in cables that connect to external data sources, such as HDMI cables and USB ports.

Application Field

The SA48-E3/73 is a very versatile and reliable component, with a wide range of applications in various electronic devices. It can be found in computers, consumer electronics, audio and video equipment, automotive systems, and much more. Thanks to its durable construction and low profile design, it is often used for protecting the circuit board from damage caused by power surges and voltage spikes.

The SA48-E3/73 can be used as an over-voltage protection device for microcontrollers, PCI-Express circuits, USB ports, HDMI ports, and other external connections. In addition, it can be used to protect sensitive components from damage caused by too much power, such as computer motherboards, memory chips, and video cards. Its simple and efficient design makes it the ideal choice for protecting sensitive electronics from these types of power surges and voltage spikes.

Working Principle

The SA48-E3/73 works by utilizing a Zener diode to detect voltage levels and then triggering the TVS diode to "clamp" the high voltage and divert it away from the sensitive components. This is done by having two reverse-biased Zener diodes connected to the anode, one with a lower breakdown voltage and the other with a higher breakdown voltage. When the voltage exceeds the lower breakdown voltage, the diode begins to conduct and the current is diverted away from the sensitive components.

Once the higher breakdown voltage is exceeded, the SA48-E3/73 acts as a high speed avalanche diode, effectively clamping the high voltage and diverting it away from the sensitive components. This helps protect the components from damage caused by overvoltages and transients. The SA48-E3/73 is also designed to have a low turn-on voltage, allowing it to quickly detect and divert voltage before it can do any damage.

The SA48-E3/73 is an excellent choice for protecting sensitive electronics from power surges and voltage spikes. It is a reliable, low profile, and versatile component that can be used in a variety of applications.