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1SMB5921BT3G is a device of 3 watt plastic surface mount zener voltage regulators.
This complete new line of 3 Watt Zener diodes provides the following advantages:(1)zener voltage ranges from -3.3 V to 200 V;(2) ESD rating of class 3 (>16 kV) per human body model;(3)flat handling surface for accurate placement;(4) package design for top side or bottom circuit board mounting;(5)pb-Free packages are available.etc.
1SMB5921BT3G also has some absolute maximum ratings:(1):maximum steady state power dissipation is 3W when TL is 75 measured at zero lead length, derate above 75 is 40 mW/;(2):thermal resistance from junction-to-Lead is 25/W;(3):maximum steady state power dissipation is 550 mW when TA is 25, derate above 25 is 4.4 mW/.(4):thermal resistance from junction-to-ambient is 226 /W;(5):operating and storage temperature ranges from -65 to +150 .
All in all, this is a simple description of this kind of device, if you are interested in it, please pay more attention to our web!