FPR FNR 2-T227 FPR FNR 4-T227
Powertron
•
•
•
•
•
Resistances from 0.001Ohm to 100Ohms
Power Rating to 80Watt
Resistance Tolerances to ±0.1%
TCR to ±15ppm/K
Load Stability to 0.1%
SPECIFICATIONS
Type
Terminals
Resistance Range
Power Rating
(with heatsink)
Thermal Resistance Rthj-c
Tolerances
Stability
Temperature Coefficient
FPR 2-T227
2
0.01 to 100 Ohms
60W
FPR 4-T227
4
(kelvin connection)
0.001 to 100 Ohms
FNR 2-T227
2
0.01 to 100 Ohms
80W
FNR 4-T227
4
(kelvin connection)
0.001 to 100 Ohms
1.3 K/W
0.1% / 1% / 2% / 5%
(others upon request)
0.1% / 0.2% / 0.5%
(depends on stress)
1.0 K/W
±15 ppm/K (20 to 60°C)
from R < 0.02 Ohms ±20 ppm/K (20 to 60°C)
FPR 2-T227 / FNR 2-T227 TK Shift depends from
resistance value (see graph next page)
1.5 kV DC
< 1 µV/K
50A
(higher upon request)
-40°C to 130°C
Metalfoil CuNiMn (DIN 17471)
Al
2
O
3
Epoxy
Cu / tinned or nickel plated
backplate: 1.5Nm
terminals: 1.3 Nm
AlN
Voltage Proof
Thermal EMF
Max. Current
Operating Temperature
Resistor Material
Substrate
Housing
Connector Material
Max. Torque
Ordering Information
Part Number - Resistance - Tolerance
FPR 2-T227 1.1 Ohms 1%
Document Number: 64207
Revision: 20-09-10
For technical questions, contact:
powertron@vishaypg.com
www.powertron.de
1
FPR FNR 2-T227 FPR FNR 4-T227
Powertron
SPECIFICATIONS
(continued)
Temperature Coefficient
4000
250
table A
2000
DR/R
(ppm)
+15ppm/K
200
0
TCR-Shift (ppm/K)
150
-2000
-15ppm/K
100
-4000
Limit 2 (3s)
-6000
Nominal
DR/R
Limit 1 (3s)
50
0
10
20
50
2
5
100
200
-8000
-40
-20
0
20
40
60
Temperature (°C)
80
100
120
140
Resistance Value (mOhm)
Derating and Stability
Power Rating Notes -
120
100
Power ( % from
nominal power)
0.5%
0.2%
0.1%
The FPR/FNR Series Foil Resistors must be attached to a suit-
able heatsink. The maximum internal resistor temperature is
130°C for a 0.5% stability part.
To specify an appropriate heatsink use the following formula :
80
60
40
20
0
25
R
θH
= T
MAX
- ( P x R
θR
) - T
A
P
Where:
50
85
100
115
130
Tem perature of the backplate (°C)
R
θ
H
= Thermal Resistance of Heatsink ( K/W )
R
θ
R
= Thermal Resistance of Resistor ( K/W )
T
MAX
= Maximum Temperature of Resistor
T
A
= Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
Dimensions and Attachment Variations
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
N
mm
26
38
12.7
4
30
15
4.1
10
8
4
2
0.8
M4
10
11.9
0.2
0.2
tol.
(±mm)
0.5
0.5
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.1
inches
1.02
1.50
0.50
0.16
1.18
0.59
0.16
0.39
0.31
0.16
0.08
0.03
M4
0.39
0.47
0.008
0.008
tol.
(±inches)
0.020
0.020
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.008
0.004
FPR/FNR 2-T227
www.powertron.de
2
FPR/FNR 4-T227
O
For technical questions, contact:
powertron@vishaypg.com
Document Number: 64207
Revision: 20-09-10
Legal Disclaimer Notice
Vishay Precision Group
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, “Vishay Precision Group”), 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 Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group 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, Vishay Precision Group
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 Vishay Precision Group’s knowledge of typical requirements that are often placed on
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properties described in the product specification is suitable for use in a particular application.
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Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
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