FHR2-3025_13 Datasheet, PDF (2/4 Pages) Riedon Powertron – Precision Shunt Resistors

FHR 2-3025 3818
FHR 4-3825 3825H 4618
Precision Shunt Resistors
SPECIFICATIONS (continued)
Temperature Coefficient
table A
4000
250
2000
0
-2000
-4000
-6000
-8000
-40
+15ppm/K
200
150
-15ppm/K
100
Limit 2 (3σ)
Nominal ∆R/R
50
Limit 1 (3σ)
-20
0
20
40
60
80
100
120
140
Temperature (°C)
0
2 5 10 20 50 100 200
Resistance Value (mOhm)
120
100
0.5%
80
0.2%
60
0.1%
40
Derating _{Power Rating Notes -}
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
20
0
25
50
85
100
115
Temperature of the backplate (°C)
Where: R_qH = Thermal Resistance of Heatsink ( K/W )
R_qR = Thermal Resistance of Resistor ( K/W )
130
T_MAX = Maximum Temperature of Resistor
T_A = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
Dimensions
FHR 4-3825 / FHR 4-3825H
Dimension
A
B
C
D
E
F
G
H
I (A-Contact)
I (K-Contact)
J
K
L
M
M (Variante H)
N
O
P (A-Contact)
P (K-Contact)
Q
R
mm
24.00
38.00
1.40
4.00
17.50
1.5x45°
27.50
17.50
1.50
1.10
3.00
3.20
2.00
6.00
10.8
30.40
15.00
3.60
3.30
2.80
19.00
tol.
(±mm)
0.2
0.3
0.4
0.1
0.2
0.1
0.2
0.2
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.4
0.2
0.1
0.1
0.1
0.2
inches
0.94
1.50
0.06
0.16
0.69
0.06x45°
1.08
0.69
0.06
0.04
0.12
0.13
0.08
0.24
0.43
1.20
0.59
0.14
0.13
0.11
0.75
tol.
(±inches)
0.008
0.012
0.016
0.004
0.008
0.004
0.008
0.008
0.004
0.004
0.004
0.004
0.004
0.008
0.008
0.016
0.008
0.004
0.004
0.004
0.008
Riedon Inc.
300 Cypress Avenue

06/13
Alhambra CA 91801
[phone]
[phone]
www.riedon.com