
IRFZ44VZS_L
www.irf.com
5
Fig 11. Maximum Effective Transient Thermal Impedance, Junction-to-Case
Fig 9. Maximum Drain Current Vs.
Case Temperature
Fig 10. Normalized On-Resistance
Vs. Temperature
25
50
75
100
125
150
175
TJ , Junction Temperature (°C)
0
10
20
30
40
50
60
I D
,
D
ra
in
C
u
rr
e
n
t
(A
)
-60 -40 -20
0
20 40 60 80 100 120 140 160 180
TJ , Junction Temperature (°C)
0.5
1.0
1.5
2.0
2.5
R
D
S
(o
n
)
,
D
ra
in
-t
o
-S
o
u
rc
e
O
n
R
e
s
is
ta
n
c
e
(N
o
rm
a
liz
e
d
)
ID = 34A
VGS = 10V
1E-006
1E-005
0.0001
0.001
0.01
0.1
t1 , Rectangular Pulse Duration (sec)
0.001
0.01
0.1
1
10
T
h
e
rm
a
l
R
e
s
p
o
n
s
e
(
Z
th
J
C
)
0.20
0.10
D = 0.50
0.02
0.01
0.05
SINGLE PULSE
( THERMAL RESPONSE )
Notes:
1. Duty Factor D = t1/t2
2. Peak Tj = P dm x Zthjc + Tc
Ri (°C/W)
τi (sec)
0.960
0.00044
0.680
0.00585
τ
J
τ
J
τ
1
τ
1
τ
2
τ
2
R
1
R
1
R
2
R
2
τ
C
Ci
i
/Ri
Ci=
τi/Ri