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.
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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.
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purchase, including but not limited to, the warranty expressed therein.
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and conditions of purchase.
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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.
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Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
1
