FHR 4-3825 3825H 4618
FEATURES
•
•
•
•
•
•
Resistances from 0.001
W
to 100
W
Power Rating to 50 Watt
Resistance Tolerances to ±0.1%
TCR to ±10 ppm/K
Very Low Inductance
Load Stability to 0.1%
TABLE 1—SPECIFICATIONS
TYPE
Resistance Range
Power Rating
Tolerances
from 0R001
Thermal Resistance
Stability (1000h)
Temperature Coefficient
Standard (Q)
Option R - Extended Temperature Range
Option N
Voltage Proof
Maximum Current
Thermal EMF
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
Free air 70°C
With heatsink
3W / 5W for 3825H
50W
0.1% / 0.25% / 0.5% / 1% / 2% / 5%
1.6 K/W
0.1% / 0.2% / 0.5%
(depends on stress)
±25ppm/K (20 to 60°C)
±50ppm/K (-40 to 130°C)
±10ppm/K (20 to 60°C)
500 VDC
150 A / 200 A for contact F
< 1µV/K
-40 to 130 °C
CuNiMn-Foil
Anodized aluminium
Epoxy
Cu / tinned
4
1 Nm
FHR 4-3825
FHR 4-3825H
FHR 4-4618
0.001 to 100 Ohms
ORDERING INFORMATION
Part Number - Resistance - Contact - Tolerance - TCR
FHR 4-4618 0R050 F 1% Q
FHR 4-3825H 1R140 A 0.1% N
Document No.: 64237
Revision: 21-12-2016
For technical questions,
contact
powertron@vpgsensors.com
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1
FHR 4-3825 3825H 4618
FIGURE 1—TEMPERATURE COEFFICIENT
2000
0
Limit 2
-2000
∆R/R
(ppm)
-4000
Nominal
∆R/R
-6000
-8000
Limit 1
-10000
-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 )
FIGURE 3—DIMENSIONS
in mm (inches)
Dimension
A-contact
K-contact
A
±0.2 (±0.008)
B
±0.3 (±0.012)
C
±0.1 (±0.004)
D
±0.1 (±0.004)
E
±0.2 (±0.008)
F
±0.1 (±0.004)
G
±0.2 (±0.008)
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)
M
±0.2 (±0.008)
N
±0.4 (±0.016)
O
±0.2 (±0.008)
P
±0.3 (±0.012)
R > 0R001
R ≤ 0R001
R > 0R001
R ≤ 0R001
Standard
Variant H
FHR 4-3825 / FHR 4-3825H
24.00 (0.94)
38.00 (1.50)
1.40 (0.06)
4.00 (0.16)
17.50 (0.69)
1.5x45° (0.06x45°)
27.50 (1.08)
17.50 (0.69)
1.50 (0.06)
1.10 (0.04)
3.00 (0.12)
3.20 (0.13)
2.00 (0.08)
6.00 (0.24)
10.80 (0.43)
30.40 (1.20)
15.00 (0.59)
3.60 (0.14)
4.10 (0.16)
2.80 (0.11)
3.30 (0.13)
19.00 (0.75)
3.30 (0.13)
----
Q
±0.3 (±0.012)
R
±0.2 (±0.008)
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For technical questions,
contact
powertron@vpgsensors.com
Document No.: 64237
Revision: 21-12-2016
FHR 4-3825 3825H 4618
FIGURE 3—DIMENSIONS
in mm (inches)
FHR 4-3825 F-contact
Dimension
A
±0.2 (±0.008)
B
±0.3 (±0.012)
C
±0.2 (±0.008)
D
±0.1 (±0.004)
E
±0.3 (±0.012)
F
±0.2 (±0.008)
G
±0.1 (±0.004)
H
±0.2 (±0.008)
I
±0.2 (±0.008)
J
±0.2 (±0.008)
K
±0.2 (±0.008)
L
±0.2 (±0.008)
M
±0.1 (±0.004)
N
±0.1 (±0.004)
O
±0.1 (±0.004)
P
±0.2 (±0.008)
Q
±0.2 (±0.008)
R
±0.7 (±0.028)
S
±0.7 (±0.028)
24.00 (0.94)
38.00 (1.50)
1.50 (0.06)
4.00 (0.16)
34.00 (1.34)
17.50 (0.69)
1.5x45° (0.06x45°)
34.00 (1.34)
32.70 (1.29)
7.50 (0.30)
24.00 (0.94)
6.30 (0.25)
4.80 (0.19)
3.20 (0.13)
2.00 (0.08)
6.00 (0.24)
15.00 (0.59)
4.10 (0.16)
3.30 (0.13)
FHR 4-4618
Dimension
A
±0.1 (±0.004)
B
±0.3 (±0.012)
C
±0.4 (±0.016)
D
±0.2 (±0.008)
E
±0.3 (±0.012)
F
±0.3 (±0.012)
G
±0.1 (±0.004)
H
±0.2 (±0.008)
I
±0.2 (±0.008)
J
±0.1 (±0.004)
K
±0.1 (±0.004)
L
±0.1 (±0.004)
M
±0.1 (±0.004)
N
±0.2 (±0.008)
O
±0.4 (±0.016)
P
±0.2 (±0.008)
Q
±0.3 (±0.012)
R
±0.3 (±0.012)
A-contact
K-contact
17.00 (0.67)
46.00 (1.81)
1.40 (0.06)
8.50 (0.33)
40.00 (1.57)
34.00 (1.34)
1.5x45° (0.06x45°)
17.50 (0.69)
27.50 (1.08)
1.50 (0.06)
1.10 (0.04)
3.00 (0.12)
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.: 64237
Revision: 21-12-2016
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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