Encyclopedia > Transient voltage suppression diode
A transient voltage suppression diode is a device used to protect sensitive electronics from voltage spikes induced on connected wires. It is also commonly referred to as a transorb, after the brand name TranZorb registered by General Semiconductor (now part of Vishay). Image File history File links Transient_voltage_suppression_diode_symbol. ... The field of electronics comprises the study and use of systems that operate by controlling the flow of electrons (or other charge carriers) in devices such as thermionic valves (vacuum tubes) and semiconductors. ... Voltage spikes are fast, short duration surges in the electric potential in a given circuit. ...
The device can be represented by two mutually opposing zener diodes in series with one another connected in parallel with the circuit to be protected. While this representation is schematically accurate physically the devices are now manufactured as a single component. The device operates by shunting excess current when the induced voltage exceeds the zener breakdown potential. Zener diode schematic symbol A Zener diode is a type of diode that permits current to flow in the forward direction like a normal diode, but also in the reverse direction if the voltage is larger than the rated breakdown voltage or Zener voltage. A conventional solid-state diode will...
Another method for transient suppression is the varistor. A varistor is an electronic component with a significant non-ohmic current-voltage characteristic. ...
Transientvoltages are produced in electrical circuits by such events as relay switching, motor commutator cycling, contact arching, and in generally any repetitious on/off cycling events.
Transientvoltagesuppression is generally achieved with the use of various types of voltage clamping devices which are coupled either between the power lines of a system, between the power lines and a neutral or ground line, or both.
If the transientvoltage which causes the first device to conduct increases, the temperature of the device also increases and when a certain temperature level is reached, the switching resistor thermally coupled to the first device becomes substantially non-conductive so that no further transientvoltage or current can be applied to the first device.
The transientvoltagesuppression circuit is used for transmitting the lighting signal to the lamp driver and attenuating the high transientvoltage generated from the lamp driver when the lamp driver lights up the lamp.
The transientvoltagesuppression circuit 23 is disposed between the control module 22 and the lamp driver 24 and used for receiving the lighting signal output from the control module 22 and outputting the lighting signal to the lamp driver 24.
Thereafter, the voltage difference between the emitter and the collector of the transistor Q1 is a constant close to 0 volt via the suppression circuit 232 and by choosing the proper resistor R3 and controlling the input voltage Vin of the resistor R3.
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