CMZB390 Datasheet, PDF (3/5 Pages) Toshiba Semiconductor – Communication, Control and Measurement Equipment Constant Voltage Regulation

CMZB68~CMZB390
Handling Precaution
1) The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded,even
for a moment. Do not exceed any of these ratings. The following are the general derating methods that we
recommend when you design a circuit with a device.
P:
We recommend that the worst case power dissipation be no greater than 50% of the
absolute maximum rating of power dissipation. Carry out adequate heat design.
P_RSM: We recommend that a device be used within the recommended area in the figure,
P_RSM-tw.
T_j:
Derate this rating when using a device in order to ensure high reliability.
We recommend that the device be used at T_j of below 120°C.
2) Thermal resistance between junction and ambient fluctuates depending on the device’s mounting condition.
When using a device, design a circuit board and a land pattern to match the appropriate thermal resistance
value.
3) Please refer to the Rectifiers databook for further information.
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2011-06-20