鈥?/div>
Resistances from 0.002Ohm to 50Ohms
Power Rating to 30Watt
Resistance Tolerances to 鹵0.25%
TCR to 鹵15ppm/K
Load Stability to 0.1%
TO-218 (TO-247) Housing
SPECIFICATIONS
Type
Resistance Range
Power rating
free air 70擄C
with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0.002 Ohms
from 0.01 Ohms
from 0.02 Ohms
Stability
Temperature Coefficient
Voltage Proof
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
1% / 2% / 5%
0.5% / 1% / 2% / 5%
0.25% / 0.5% / 1% / 2% / 5%
0.1% / 0.2% / 0.5%
(depends on stress)
R > 0.2 Ohms 鹵15ppm/K (20 to 60擄C)
R 鈮?0.2 Ohms TCR see table A next page
300 VDC
< 0.1碌V/K
-40 to 130擄C
CuNiMn-Foil
anodized aluminium
PPS
Cu tinned
2
1 Nm
FPR 2-T218
0.002 to 50 Ohms
2 W
30 W
2.5 K/W
Derating
120
Power ( % from
nominal power)
Power Rating Notes -
0.5%
0.2%
0.1%
100
80
60
40
20
0
25
The FPR Series Resistors must be attached to a suitable heat-
sink. The maximum internal resistor temperature is 130擄C.
To specify an appropriate heatsink use the following formula :
R
qH
= T
MAX
- ( P x R
qR
) - T
A
P
Where:
R
qH
= Thermal Resistance of Heatsink ( K/W )
R
qR
= Thermal Resistance of Resistor ( K/W )
T
MAX
= Maximum Temperature of Resistor
T
A
= Ambient Temperature of Heatsink ( 擄C )
P = Power Through Resistor ( W )
50
85
100
115
130
Temperature of the backplate (擄C)
Ordering Information
Part Number - Resistance - Contact - Tolerance
FPR 2-T218 0.068 Ohms A 0.5%
Powertron GmbH
Potsdamer Strasse 18a D-14513 Teltow
+49 (0)3328 3530-0
A Riedon Company
www.powertron.de
+49 (0)3328 3530-15
Page 41
rev. 03/2006A
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