What is Breakover Current of a GTO Thyristor?

1 Answer
Can you answer this question?

Editorial Team - everything PE

Jun 11, 2024

The breakover current of a Gate Turn-Off (GTO) thyristor is the minimum anode current needed to trigger and maintain the device's turn-on process when the applied voltage surpasses the breakover voltage. This parameter is essential for understanding the conditions under which the GTO transitions from its off state (high-impedance, non-conducting) to its on state (low-impedance, conducting) without a gate signal.

Key features of Breakover Current

Threshold Current: The breakover current denotes the minimum current required for the GTO to initiate conduction when exposed to a voltage surpassing its breakover voltage. This criterion ensures that the device remains unaffected by minor fluctuations or circuit noise, preventing unintended activation.

Unintended Activation: When the anode current surpasses this threshold while the applied voltage remains above the breakover voltage, the GTO may unintentionally turn on. Failure to address this situation may result in circuit malfunction or damage.

Circuit Design: While designing circuits for reliable operation, engineers must consider both the breakover voltage and breakover current. Proper design practices avoid the risk of unexpected turn-on of the GTO.

Click here to learn more about GTO thyristors listed on everything PE.