Tvs transistor (transient voltage suppression diode) is a new product developed on the basis of voltage stabilization technology, and it is a new type of high-efficiency circuit protection device with P-second response time and high surge absorption capacity.
Zener diode (also known as Zener diode) is a diode that uses the reverse breakdown state of pn junction to keep the voltage stable in a large current range.
Transient voltage suppressor
About the difference between them, manifested in:
1) working principle
Tvs tube: Avalanche effect, when high-energy instantaneous overvoltage pulse occurs, its working impedance can be immediately reduced to a very low conduction value, allowing the maximum current to pass, and clamping the voltage at a predetermined level, thus avoiding the damage of precision components in the circuit.
Zener tunneling effect: when the reverse voltage reaches and exceeds the stable voltage, the reverse current suddenly increases, while the voltage across the diode remains unchanged.
2) Classification
Tvs tube: it can be divided into unipolar and bipolar according to polarity; According to the purpose, it can be divided into general type and special type.
Voltage regulator: according to the voltage regulator level, it can be divided into low-voltage diode (below 40V) and high-voltage regulator diode (above 200 V); According to the material, it can be divided into N type and P type.
3) Main parameters
Tvs tube: The reverse breakdown voltage is breakdown voltage (VBR), reverse leakage current (IR), maximum reverse working voltage (VRWM), maximum clamping voltage (VC), capacitance value (CJ), maximum peak pulse current (IPP), reverse pulse peak power (PPR) and so on.
RegulATor: stable voltage (VZ), stable current (IE), dynamic resistance (RZ), maximum dissipated power (PZM), maximum/minimum stable working current (IZmax/IZmin), temperature coefficient (at) and so on.
4) use
Tvs tube: used for transient voltage protection; In terms of voltage accuracy, TVS tube is in a range; In terms of flow capacity, TVS tube can reach several hundred amperes; In terms of voltage stabilization, TVS tube is 6.8v-550v；; ;
Voltage regulator: clamp drain and source; In terms of voltage accuracy, the voltage regulator is more accurate; In terms of current capacity, the surge current of the regulator is very small; In terms of voltage stabilizing value, the voltage stabilizing tube is 3.3 V-75 V;
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