FHR
2/4-8065 80110 80216 80320 80370
Precision Power Shunt Resistors
SPECIFICATIONS
(continued)
Temperature Coefficient
4000
250
2000
table A
+15ppm/K
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)
Power Rating Notes -
100
80
60
40
20
0
25
0.5%
0.2%
0.1%
The FHR 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
75
85
100
115
130
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 )
50
Temperature of the backplate (°C)
Dimensions
Dimension
B
C
D
E
F
G
mm
80.00
60.00
Ø4.75
15.00
67.00
2.00
tol.
(±mm)
0.3
0.3
0.2
0.2
0.3
0.1
inches
3.15
2.36
Ø0.19
0.59
2.64
0.08
tol.
(±inches)
0.012
0.012
0.008
0.008
0.012
0.004
Dimension
A
L1
L2
L3
L4
8065
mm
65.00
6.00
59.00
80110
mm
110.00
6.00
104.00
80216
mm
216.00
6.00
108.00
210.00
80320
mm
320.00
6.00
108.50
211.50
314.00
80370
mm
370.00
6.00
125.50
244.50
364.00
tol.
(±mm)
0.3
0.3
0.3
0.3
0.3
8065
inches
2.56
0.24
2.32
80110
inches
4.33
0.24
4.09
80216
inches
8.50
0.24
4.25
8.27
80320
inches
12.60
0.24
4.27
8.33
12.36
80370
inches
14.57
0.24
4.94
9.63
14.33
tol.
(±inches)
0.012
0.012
0.012
0.012
0.012
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
Page 23
rev. 03/2006A
RIEDON [ RIEDON POWERTRON ]
