FHR 2-3025ꢀ3818
FHRꢀ4-3825ꢀ3825Hꢀ4618
PrecisionꢀShuntꢀResistors
SPECIFICATIONS (continued)
Temperature Coefficient
tableꢀA
4000
2000
0
250
200
+15ppm/K
150
100
-15ppm/K
-2000
-4000
-6000
Limit 2 (3σ)
Nominal ∆R/R
Limit 1 (3σ)
50
0
-8000
2
5
10
20 50 100 200
-40
-20
0
20
40
60
80
100
120
140
ResistanceꢀValueꢀ(mOhm)
Temperatureꢀ(°C)
Derating
PowerꢀRatingꢀNotesꢀ-
120
100
80
60
40
20
0
TheꢀFHRꢀSeriesꢀResistorsꢀmustꢀbeꢀattachedꢀtoꢀaꢀsuitableꢀheat-
sink. The maximum internal resistor temperature is 130°C.
Toꢀspecifyꢀanꢀappropriateꢀheatsinkꢀuseꢀtheꢀfollowingꢀformulaꢀ:
0.5%
0.2%
0.1%
RqHꢀ=ꢀTMAX - ( P x RqRꢀ)ꢀ-ꢀTA
ꢀꢀꢀꢀꢀꢀꢀꢀꢀP
Where:ꢀ RqHꢀ=ꢀThermalꢀResistanceꢀofꢀHeatsinkꢀ(ꢀK/Wꢀ)
ꢀ
ꢀ
ꢀ
ꢀ
RqRꢀ=ꢀThermalꢀResistanceꢀofꢀResistorꢀ(ꢀK/Wꢀ)
TMAX = Maximum Temperature of Resistor
TAꢀ=ꢀAmbientꢀTemperatureꢀofꢀHeatsinkꢀ(ꢀ°Cꢀ)
Pꢀ=ꢀPowerꢀThroughꢀResistorꢀ(ꢀWꢀ)
25
50
85
100
115
130
Temperatureꢀofꢀtheꢀbackplateꢀ(°C)
Dimensions
tol.
tol.
(±inches)
FHR 4-3825 / FHR 4-3825H
Dimension
mm
24.00
38.00
1.40
(±mm)
0.2
0.3
0.4
0.1
0.3
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
A
0.008
0.012
0.016
0.004
0.012
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
B
1.50
C
0.06
D
4.00
0.16
E
34.00
17.50
1.5x45°
17.50
27.50
1.50
1.34
F
0.69
G
0.06x45°
0.69
H
I
1.08
Jꢀ(A-Contact)
0.06
Jꢀ(K-Contact)
1.10
0.04
K
L
3.00
0.12
3.20
0.13
M
N
2.00
0.08
max.5.5
max.0.22
max.0.4
1.20
Nꢀ(VarianteꢀH) max.10.3
O
30.40
15.00
3.60
P
0.59
Qꢀ(A-Contact)
Qꢀ(K-Contact)
R
0.14
3.30
0.13
2.80
0.11
Sꢀ(VarianteꢀH)
19.00
0.75
Powertron GmbHꢀ PotsdamerꢀStrasseꢀ18aꢀ D-14513ꢀTeltowꢀ
+49ꢀ(0)3328ꢀ3530-0ꢀ
+49ꢀ(0)3328ꢀ3530-15
Pageꢀ19
AꢀRiedonꢀCompanyꢀ
ꢀ
www.powertron.de
ꢀ
rev.ꢀ03/2006A
RIEDON [ RIEDON POWERTRON ]
