跳至主要內容
Knowledgebase
Home
Renesas Electronics Taiwan - Knowledgebase

Do I need to use a Zener diode to prevent the drain of the source voltage?

Latest Updated:09/02/2013

Question:

I'm using the 2SK2412 to drive a Peltier device. When the MOSFET is turned off, about 69 V of voltage is applied momentarily (50 ns) to the drain to source body diode inside the MOSFET.
This means that for about 50 ns, the drain to source voltage exceeds the absolute maximum rating of 60 V. Is this all right? Do I need to use a Zener diode or other protection circuit to prevent the drain to source voltage from exceeding 60 V?

Answer:

Please do not exceed the maximum rating (Vdss), even for a short time. Since 69 V is applied between the drain and the source, add a 60 V Zener diode or other protection circuit.

This article is written based on not recommended products.

Suitable Products
Power MOSFETs for General Switching