FPR FPS
2/4-T220 T221
Precision Power Shunt Resistors
SPECIFICATIONS
(continued)
Temperature Coefficient
4000
250
2000
+15ppm/K
table A
200
0
-15ppm/K
Limit 2 (3σ)
Nominal ∆R/R
Limit 1 (3σ)
-2000
-4000
TCR - Shift (ppm/K)
∆R/R (ppm)
150
100
-6000
50
-8000
-40
-20
0
20
40
60
80
100
120
140
0
2
Temperature (°C)
Resistance Value (mOhm)
5
10
20
50
100
200
Derating
120
Power ( % from
nominal power)
100
80
60
40
20
0
25
0.5%
0.2%
0.1%
50
85
100
115
130
Temperature of the backplate (°C)
Power Rating Notes -
The FPR Series Resistors must be attached to a suitable heat-
sink. The maximum internal resistor temperature is 130°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 ( °C )
P = Power Through Resistor ( W )
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
Page 46
rev. 03/2006A
RIEDON [ RIEDON POWERTRON ]
