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
www.powertron.de
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)
www.powertron.de
2
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
Legal Disclaimer Notice
Vishay Precision Group, Inc.
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “VPG”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in
any other disclosure relating to any product.
The product specifications do not expand or otherwise modify VPG’s terms and conditions of purchase, including but
not limited to, the warranty expressed therein.
VPG makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase.
To the maximum extent permitted by applicable law, VPG disclaims (i) any and all liability arising out of the
application or use of any product, (ii) any and all liability, including without limitation special, consequential or
incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose,
non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications and
performance may vary over time. Statements regarding the suitability of products for certain types of applications
are based on VPG’s knowledge of typical requirements that are often placed on VPG products. It is the customer’s
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No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any
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The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
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Please contact authorized VPG personnel to obtain written terms and conditions regarding products designed for such
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Product names and markings noted herein may be trademarks of their respective owners.
Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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