SMP20-M3/84A

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TVS (Transient Voltage Suppressor) diodes, also known as surge protection diodes, are used to protect a range of electronic devices from sudden electrical glitches that occur from time to time. The SMP20-M3/84A is a type of TVS diode that can be found in many applications. This article will discuss the various application fields and working principle of the SMP20-M3/84A.

The SMP20-M3/84A is a unidirectional diode that features an excellent transient voltage clamping capability, even at low surge depths. It features a voltage rating of 20V and a maximum breakdown voltage of 20A. The device also offers excellent surge capability, with a maximum surge current of 20A and a maximum surge energy of 5.6 Joules. The device is also capable of withstanding voltage peak pulses up to 400 Watts.

The SMP20-M3/84A is mainly used in the telecom and information technology industry. It can be used in mobile phones, routers, optical transceivers, and other communications equipment. It can also be used to protect sensitive data lines, such as Ethernet cables and USB cables, from power surges and other over voltages. It is also useful for computer motherboards, hard disk drives, memory chips, and power systems.

The working principle of the SMP20-M3/84A involves two major components: a reverse-biased Zener diode and an avalanche diode. When a voltage exceeding the device\'s rated volts is applied, the Zener diode will rapidly conduct the current, diverting it away from the sensitive components. Then, the avalanche diode will be triggered and activate its Snapback effect, allowing the device to absorb the rest of the surge. This makes the device an effective transient voltage suppressor, able to absorb the sudden energy surges and safeguarding expensive electronic equipments.

In conclusion, the SMP20-M3/84A is a type of TVS diode that works effectively in the telecom and information technology industry. It features excellent surge capability, with a voltage rating of 20V and a maximum breakdown voltage of 20A. Additionally, the diode employs a two-step process to absorb sudden voltage peaks. The Zener diode probes the voltage, and when it exceeds a certain threshold, the Avalanche diode engages the Snapback effect to absorb the energy surge. Thus, the SMP20-M3/84A is an invaluable component for protecting against electrical glitches and power surges.

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