21-09-2012, 10:54 AM
Transient Voltage Suppression Diode
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Transil, Trisil and SIDAC
Transil is the trade name of Transient Voltage Suppression diode or TVS diode of ST Microelectronics, Transil diode is used to protect sensitive electronic devices from voltage spikes and transients induced by the mains. Transil protects the circuit by shunting excess current if the induced current exceeds the avalanche breakdown point. It works like a clamping diode to remove all the excess voltage induced. When the overvoltage condition goes off, the Transil automatically resets. Trisil is the trade name of the Thyristor Surge Protection device, another surge protector for electronic equipments. SIDAC is also a protection device less commonly used for surge protection for AC.
SIDAC is also a protection device less commonly used for surge protection for AC.SIDAC is the Silicon Diode for Alternating Current having very high current rating and fast response. SIDAC is also known as SYDAC (Silicon thYristor for Alternating Current).In structure, SIDAC is a bidirectional device formed of bidirectional Thyristor diodes and technically specified as a bilateral voltage triggered switch. The working of SIDAC is similar to a DIAC used as pulse generators in Triac controlled devices. It is similar to a Triac without gate and is a five layered device. Since the SIDAC handles much current, it can be used to switch on a device and not like the triggering in DIAC.