Question
Download Solution PDFThe minimum anode current, which must flow through the SCR in order for it to stay ON initially after the gate signal is removed, is known as ______.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFLatching Current: It is the minimum anode current required to maintain the Thyristor in the ON state immediately after a Thyristor has been turned on and the gate signal has been removed.
Holding Current: It is the minimum anode current to maintain the Thyristor in the on-state.
- Latching current is always greater than holding current.
- Latching current and holding current terms have their significance in making a Thyristor ON and OFF respectively.
- The thyristor goes to on state when the Thyristor current is more than the latching current.
- Once Thyristor gets ON then there is no meaning of latching current.
- For 20A Thyristor we have to use BT152 and the ratio of latching current to holding current in BT152 is in the range of 2.
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