SM30T19CAY

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The SM30T19CAY is a transient voltage suppressor diode, part of the TVS (Transient Voltage Suppressor) diodes collection. It has a reverse voltage of 30V and the breakdown voltage, its non-repetitive peak pulse power is 600W. With a maximum capacitance of 11 pF at Vr = 0V and f = 1MHz, this medium voltage TVS has a small package with an encapsulated DO-15 SOD-123 package, making it lightweight and suitable for power applications.

This TVS diode is designed to protect sensitive equipment from damaging transient over-voltage, or transient spikes, that may quickly destroy the electronics. Dispensing with traditional protection circuits or devices, that often increase device board space, the SM30T19CAY adds just a tiny part to the board layout. Applications for this diode that take advantage of its small package include consumer electronics, LCD, network switches, consumer electronics, and lithium batteries.

The working principle of this TVS diode is based on Zener breakdown. It has an avalanche breakdown at a much larger reverse voltage than those of a Zener diode. When a transient voltage exceeds a certain threshold, the SM30T19CAY acts as a clamping element, momentarily absorbing the energy before clamping the voltage between power and ground. This helps protect vulnerable circuits from overvoltage-caused damage. In the on-state, current is allowed to flow from anode to cathode, while in the off-state, current cannot flow.

The SM30T19CAY is able to achieve fast response in both unidirectional and bidirectional overvoltage protection. When it senses a transient voltage, the TVS diode is able to start to conduct the energy before it can cause damage to the sensitive part it is protecting. This is thanks to its response time, which gives a maximum clamping time of 15ns for 10/1000 μs waves.

The SM30T19CAY is a reliable and robust TVS diode that can be used for unidirectional and bidirectional protection. With its low reverse leakage, low capacitance, and low forward voltage, it provides economical protection against transient overvoltage conditions. Its capabilities to work efficiently in both large and small packages also make it a valuable addition to a broad range of applications.

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