FHR 2-3025 3818 FHR 4-3825 3825H 4618

FHR 2-3025 3818
FHR 4-3825 3825H 4618
Precision Shunt Resistors
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Resistances from 0.001Ohm to 100Ohms
Power Rating to 50Watt
Resistance Tolerances to ±0.1%
TCR to ±10ppm/°C
Very Low Inductance
Isolated Back Plate
SPECIFICATIONS
Type
FHR 2-3025
FHR 2-3818
FHR 4-3825
FHR 4-3825H
FHR 4-4618
Resistance Range
0.010 to 100Ohms
0.001 to 100Ohms
3W
40 W
3W
5W
50 W
2.0 K/W
1.6 K/W
Power rating
free air 70°C
for 3825H
with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0R001
from 0R005
from 0R01
from 0R02
1% / 2% / 5%
0.5% / 1% / 2% / 5%
0.1% / 0.25% / 0.5% / 1% / 2% / 5%
0.1% / 0.25% / 0.5% / 1% / 2% / 5%
0.5% / 1% / 2% / 5%
0.25% / 0.5% / 1% / 2% / 5%
Stability
0.1% / 0.2% / 0.5%
(depends on stress)
Temperature Coefficient
Standard
±25ppm/K (20 to 60°C)
±50ppm/K (20 to 60°C)
Other specifications upon request
Option1
Max. Current
±50ppm/K (-40 to 130°C)
other specifications upon request
50A - Contact K
150 A - Contact A
200 A - Contact F
Voltage Proof
500 VDC
Thermal EMF
< 0.1µV/K
Operating Temperature Range
-40 to 130°C
Resistor Material
CuNiMn-Foil
Substrate
anodized aluminium
Housing
Epoxy
Connector Material
Cu tinned
Terminals
2
Max. torque
4
1 Nm
Ordering Information
Part Description: Part Type - Resistance - Contact - Tolerance
FHR 4-4618 0.050 Ohms A 1%
Riedon Inc.
08/14
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
FHR 2-3025 3818
FHR 4-3825 3825H 4618
Precision Shunt Resistors
SPECIFICATIONS (continued)
Temperature Coefficient
Derating
Power Rating Notes Power ( % from
nominal power)
120
The FHR Series Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 130°C.
To specify an appropriate heatsink use the following formula :
0.5%
100
0.2%
80
0.1%
40
RθH = TMAX - ( P x RθR ) - TA
P
20
Where:
60
0
25
50
85
100
115
130
Temperature of the backplate (°C)
RθH = Thermal Resistance of Heatsink ( K/W )
RθR = Thermal Resistance of Resistor ( K/W )
TMAX = Maximum Temperature of Resistor
TA = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
Dimensions
FHR 4-3825
FHR 4-3825H
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
0.008
A
24.00
0.2
0.94
B
38.00
0.3
1.50
0.012
C
1.40
0.4
0.06
0.016
D
4.00
0.1
0.16
0.004
E
17.50
0.2
0.69
0.008
F
1.5x45°
0.1
0.06x45°
0.004
G
27.50
0.2
1.08
0.008
H
17.50
0.2
0.69
0.008
I (A-Contact)
1.50
0.1
0.06
0.004
I (K-Contact)
1.10
0.1
0.04
0.004
J
3.00
0.1
0.12
0.004
K
3.20
0.1
0.13
0.004
L
2.00
0.1
0.08
0.004
M
6.00
0.2
0.24
0.008
M (Variante H)
10.8
0.2
0.43
0.008
0.016
N
30.40
0.4
1.20
O
15.00
0.2
0.59
0.008
P (A-Contact)
3.60
0.1
0.14
0.004
P (K-Contact)
3.30
0.1
0.13
0.004
Q
2.80
0.1
0.11
0.004
R
19.00
0.2
0.75
0.008
*Apply current to “I” terminals and measure on “U” terminals
Riedon Inc.
08/14
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
FHR 2-3025 3818
FHR 4-3825 3825H 4618
Precision Shunt Resistors
SPECIFICATIONS (continued)
FHR 4-3825F
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
A
24.00
0.2
0.94
0.008
B
38.00
0.3
1.50
0.012
C
1.50
0.2
0.06
0.008
D
4.00
0.1
0.16
0.004
E
34.00
0.3
1.34
0.012
F
17.50
0.2
0.69
0.008
G
1.5x45°
0.1
0.06x45°
0.004
H
34.00
0.2
1.34
0.008
I
32.70
0.2
1.29
0.008
J
7.50
0.2
0.30
0.008
K
24.00
0.2
0.94
0.008
L
6.30
0.2
0.25
0.008
M
4.80
0.1
0.19
0.004
N
3.20
0.1
0.13
0.004
O
2.00
0.1
0.08
0.004
P
6.00
0.2
0.24
0.008
Q
15.00
0.2
0.59
0.008
R
4.10
0.7
0.16
0.028
S
3.30
0.7
0.13
0.028
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
*Apply current to “I” terminals and measure on “U” terminals
FHR 4-4618
A
17.00
0.1
0.67
0.004
B
46.00
0.3
1.81
0.012
C
1.40
0.4
0.06
0.016
D
8.50
0.2
0.33
0.008
E
40.00
0.3
1.57
0.012
F
34.00
0.3
1.34
0.012
G
1.5x45°
0.1
0.06x45°
0.004
H
17.50
0.2
0.69
0.008
I
27.50
0.2
1.08
0.008
J (A-Contact)
1.50
0.1
0.06
0.004
J (K-Contact)
1.10
0.1
0.04
0.004
K
3.00
0.1
0.12
0.004
L
3.20
0.1
0.13
0.004
M
2.00
0.1
0.08
0.004
N
max.5.5
0.2
max.0.22
0.008
O
23.40
0.4
0.92
0.016
P
15.00
0.2
0.59
0.008
Q (A-Contact)
3.60
0.1
0.14
0.004
Q (K-Contact)
3.30
0.1
0.13
0.004
R
2.80
0.2
0.11
0.008
*Apply current to “I” terminals and measure on “U” terminals
Riedon Inc.
08/14
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
FHR 2-3025 3818
FHR 4-3825 3825H 4618
Precision Shunt Resistors
SPECIFICATIONS (continued)
FHR 2-3025
Dimension
FHR 2-3818
Riedon Inc.
08/14
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
mm
tol.
(±mm)
inches
tol.
(±inches)
A
24.00
0.2
0.94
0.008
B
30.00
0.2
1.18
0.008
C
1.40
0.4
0.06
0.016
D
4.00
0.1
0.16
0.004
E
27.00
0.2
1.06
0.008
F
15.00
0.2
0.59
0.008
G
1.5x45°
0.1
0.06x45°
0.004
H
20.32
0.2
0.80
0.008
I (A-Contact)
1.50
0.1
0.06
0.004
I (K-Contact)
1.10
0.1
0.04
0.004
J
1.10
0.1
0.04
0.004
K
3.20
0.1
0.13
0.004
L
2.00
0.1
0.08
0.004
M
max.5.5
0.2
max.0.22
0.008
N
30.40
0.4
1.20
0.016
O
15.00
0.2
0.59
0.008
P (A-Contact)
3.60
0.1
0.14
0.004
P (K-Contact)
3.30
0.1
0.13
0.004
Q
2.80
0.2
0.11
0.008
Dimension
mm
tol.
(±mm)
inches
tol.
(±inches)
A
17.00
0.2
0.67
0.008
B
38.00
0.3
1.50
0.012
C
1.40
0.4
0.06
0.016
D
8.50
0.2
0.33
0.008
E
32.00
0.3
1.26
0.012
F
27.00
0.2
1.06
0.008
G
1.5x45°
0.1
0.06x45°
0.004
H
20.32
0.2
0.80
0.008
I (A-Contact)
1.50
0.1
0.06
0.004
I (K-Contact)
1.10
0.1
0.04
0.004
J
1.10
0.1
0.04
0.004
K
3.20
0.1
0.13
0.004
L
2.00
0.1
0.08
0.004
M
max.5.5
0.2
max.0.22
0.008
N
23.40
0.4
0.92
0.016
O
15.00
0.2
0.59
0.008
P (A-Contact)
3.60
0.1
0.14
0.004
P (K-Contact)
3.30
0.1
0.13
0.004
Q
2.80
0.2
0.11
0.008
(626) 284-9901
(626) 284-1704