Mmbt4403, Maximum ratings, Thermal characteristics – Diodes MMBT4403 User Manual
Page 2: Derating curve, Transient thermal impedance, Pulse power dissipation

MMBT4403
Document Number: DS30058 Rev. 11 - 2
2 of 6
March 2012
© Diodes Incorporated
MMBT4403
Maximum Ratings
(@T
A
= +25°C, unless otherwise specified.)
Characteristic Symbol
Value
Unit
Collector-Base Voltage
V
CBO
-40 V
Collector-Emitter Voltage
V
CEO
-40 V
Emitter-Base Voltage
V
EBO
-6.0 V
Collector Current - Continuous (Note 7)
I
C
-600 mA
Thermal Characteristics
(@T
A
= +25°C, unless otherwise specified.)
Characteristic Symbol
Value
Unit
Collector Power Dissipation
(Note 5)
P
D
310
mW
(Note 6)
350
Thermal Resistance, Junction to Ambient
(Note 5)
R
θJA
403
°C/W
(Note 6)
357
Thermal Resistance, Junction to Leads
(Note 7)
R
θJL
350
°C/W
Operating and Storage Temperature Range
T
J,
T
STG
-55 to +150
°C
Notes:
5. For the device mounted on minimum recommended pad layout FR4 PCB with high coverage of single sided 1oz copper, in still air conditions.
6. For the device mounted on 15mm x 15mm x 1.6mm FR4 PCB with high coverage of single sided 1oz copper, in still air conditions.
7. Thermal resistance from junction to solder-point (at the end of the collector lead).
0
25
50
75
100
125
150
0.0
0.1
0.2
0.3
0.4
Derating Curve
Temperature (°C)
M
a
x P
o
w
e
r
D
issi
p
a
ti
o
n
(W
)
100µ
1m
10m 100m
1
10
100
1k
0
50
100
150
200
250
300
350
400
Transient Thermal Impedance
D=0.5
D=0.2
D=0.1
Single Pulse
D=0.05
T
h
e
rm
a
l R
e
si
st
a
n
ce
(
°C
/W
)
Pulse Width (s)
10m
100m
1
10
100
1k
0.1
1
10
Single Pulse. T
amb
=25°C
Pulse Power Dissipation
Pulse Width (s)
M
a
x
P
o
we
r Di
s
si
p
at
io
n
(W)