Diodes ZUMT491 - Manual (Page 3)

ZUMT491
Document number: DS33334 Rev. 3 - 2
3 of 7
www.diodes.com
October 2012
© Diodes Incorporated
ZUMT491
A Product Line of
Diodes Incorporated
Thermal Characteristics and Derating Information
100m 1 10
10m
100m
1
25mm x 25mm 1oz FR4 PCB
Single Pulse
T
amb
=25°C
V
CE(on)
Limited
100µs
1ms
10ms
100ms
1s
DC
Safe Operating Area
I C
C
o
llec
to
r C
u
rr
ent
(A
)
V
CE
Collector-Emitter Voltage (V)
0 20 40 60 80 100 120 140 160
0.0
0.1
0.2
0.3
0.4
0.5
0.6
25mm x 25mm 1oz FR4 PCB
Derating Curve
Temperature (°C) M
a
x P
o
we
r D
issi
p
a
ti
o
n
(W
)
100µ 1m 10m 100m 1 10 100 1k
0
40
80
120
160
200
240 25mm x 25mm 1oz FR4 PCB
T
amb
=25°C
Transient Thermal Impedance
D=0.5
D=0.2
D=0.1
Single Pulse
D=0.05
Ther
m
a
l R
es
is
tanc
e (°
C
/W)
Pulse Width (s)
100µ 1m 10m 100m 1 10 100 1k
0.1
1
10
100
25mm x 25mm 1oz FR4 PCB
Single Pulse
T
amb
=25°C
Pulse Power Dissipation
Pulse Width (s)
Ma
x
imu
m P
o
w
e
r (
W
)