FHR 2-3025 3818
FEATURES
•
•
•
•
•
•
Resistances from 0.01Ohm to 100Ohms
Power Rating to 40Watt
Resistance Tolerances to ±0.5%
TCR to ±50ppm/K
Very Low Inductance
Stability to 0.1%
TABLE 1—SPECIFICATIONS
TYPE
Resistance Range
Power Rating
Tolerances
from 0R01
from 0R02
Thermal Resistance
Stability (1000h)
Temperature Coefficient
Voltage Proof
Maximum Current
Thermal EMF
Operating Temperature Range
Resistor Material
Housing
Substrate
Connector Material
Terminals
Max. torque
Free air 70°C
With heatsink
3W
40W
0.5% / 1% / 2% / 5%
0.25% / 0.5% / 1% / 2% / 5%
2.0 K/W
0.1% / 0.2% / 0.5%
(depends on stress)
±50ppm/K (20 to 60°C)
other specifications upon request
500 VDC
150 A
<0.1 μV/K
–40°C to 130°C
CuNiMn-Foil
Epoxy
Anodized aluminium
Cu / tinned
2
1 Nm
FHR 2-3025
FHR 2-3818
0.010 to 100Ohms
ORDERING INFORMATION
Part Number - Resistance - Contact - Tolerance
FHR 2-3818 0R050 A 1%
Document No.: 64206
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
1
FHR 2-3025 3818
FIGURE 1—TEMPERATURE COEFFICIENT
4000
2000
Limit 2
0
-2000
∆R/R
(ppm)
-4000
Nominal
∆R/R
-6000
-8000
-10000
Limit 1
-12000
-40
-20
0
20
40
60
80
100
120
140
Temperature (°C)
FIGURE 2—DERATING
Power Rating Notes -
120
Power ( % from
nominal power)
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
50
85
100
115
130
Where:
Temperature of the backplate (°C)
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 )
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For technical questions,
contact
powertron@vpgsensors.com
Document No.: 64206
Revision: 31-01-2015
FHR 2-3025 3818
FIGURE 3—DIMENSIONS
in mm (inches)
FHR 2-3025
Dimension
A
±0.2 (±0.008)
B
±0.2 (±0.008)
C
±0.4 (±0.016)
D
±0.1 (±0.004)
E
±0.2 (±0.008)
F
±0.2 (±0.008)
G
±0.1 (±0.004)
H
±0.2 (±0.008)
I
±0.1 (±0.004)
J
±0.1 (±0.004)
K
±0.1 (±0.004)
L
±0.1 (±0.004)
M
±0.2 (±0.008)
N
±0.4 (±0.016)
O
±0.2 (±0.008)
P
±0.1 (±0.004)
Q
±0.2 (±0.008)
A-Contact
K-Contact
24.00 (0.94)
30.00 (1.18)
1.40 (0.06)
4.00 (0.16)
27.00 (1.06)
15.00 (0.59)
1.5x45° (0.06x45°)
20.32 (0.80)
1.50 (0.06)
1.10 (0.04)
1.10 (0.04)
3.20 (0.13)
2.00 (0.08)
max.5.5 (0.22)
30.40 (1.20)
15.00 (0.59)
3.60 (0.14)
3.30 (0.13)
2.80 (0.11)
FHR 2-3818
Dimension
A
±0.2 (±0.008)
B
±0.3 (±0.012)
C
±0.4 (±0.016)
D
±0.2 (±0.008)
E
±0.3 (±0.012)
F
±0.2 (±0.008)
G
±0.1 (±0.004)
H
±0.2 (±0.008)
I
±0.1 (±0.004)
J
±0.1 (±0.004)
K
±0.1 (±0.004)
L
±0.1 (±0.004)
M
±0.2 (±0.008)
N
±0.4 (±0.016)
O
±0.2 (±0.008)
P
±0.1 (±0.004)
Q
±0.2 (±0.008)
A-Contact
K-Contact
17.00 (0.67)
38.00 (1.50)
1.40 (0.06)
8.50 (0.33)
32.00 (1.26)
27.00 (1.06)
1.5x45° (0.06x45°)
20.32 (0.80)
1.50 (0.06)
1.10 (0.04)
1.10 (0.04)
3.20 (0.13)
2.00 (0.08)
max.5.5 (0.22)
23.40 (0.92)
15.00 (0.59)
3.60 (0.14)
3.30 (0.13)
2.80 (0.11)
Document No.: 64206
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
3
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Vishay Precision Group, Inc.
Disclaimer
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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