PFS35-10RF1 Datasheet, PDF (2/2 Pages) Riedon Powertron – Power SMD Film Resistors

PFS35
Power SMD Film Resistors
SPECIFICATIONS (continued)
Power Derating
% Power
100
80
60
40
20
0
-50 0
+25 rC
+175 rC
50
100 150 200
Flange Temperature (C)
Power Rating Notes -
The PFS35 Series Resistors must be attached to a suitable
heatsink. The maximum internal resistor temperature is 175°C.
To specify an appropriate heatsink use the following formula :
RHH
=
TMAX - (P * RHR) - TA
P
Where:
R_θH = Thermal Resistance of Heatsink ( K/W )
R_θR = Thermal Resistance of Resistor ( K/W )
T_MAX = Maximum Temperature of Resistor
T_A = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
DIMENSIONS
Back plate is isolated from both pins.
Dimension
mm
A
10.3
B
10.1
C
15.3
D
5.08
E
1.5
F
0.75
G
2.2
H
4.5
J
0.5
K
2.5
L
5.0
tol.
(±mm)
0.2
0.2
1.2
0.1
0.05
0.05
0.2
0.2
0.05
0.5
1.0
inches
0.405
0.400
0.602
0.200
0.060
0.030
0.087
0.177
0.020
0.10
0.20
tol.
(±inches)
0.008
0.008
0.047
0.004
0.002
0.002
0.008
0.008
0.002
0.02
0.04
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www.riedon.com
[phone]
[phone]
08/17