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Holding current
The holding current is the value of on state current required to maintain conduction once the device the device has fully timed on and the gate current has been removed. The on state current must have previously exceeded the latching current Ti. To turn off A thyristor the load current must remain below Iii for sufficient time to tallow a return to the off state. This condition must be met at the highest operating junction temperature. Therefore it is the minimum value of anode current below which it must fall for taming off the thyristor. It may also define as the minimum anode current that must be following to keep the device in a regenerative on state condition. Below this holding current value the device will return to a blocking state of condition.
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