KPR KPN KHR KHN T227
Powertron
•
•
•
•
•
Resistances from 0.05Ohm to 5MOhms
Power Rating to 200Watt
Resistance Tolerances to ±1%
TCR to ±50ppm/K
TO-227 (TO-238) Housing
SPECIFICATIONS
Type
Resistance Range
Power rating with heatsink
Thermal Resistance Rthj-c
Tolerances
from 0.05 Ohms
from 0.1 Ohms
Stability
Temperature Coefficient
0.05 to 0.099 Ohms
0.1 to 5 MOhms
Voltage Proof
Inductivity
Capacity
Max. Voltage
depending on resistance value
100 W
0.7 K/W
2% / 5% / 10%
1% / 2% / 5% / 10%
1%
±300 ppm/K
±100 ppm/K
upon request ±50 ppm/K
Standard 1.5 kVDC / upon request 2.5 kVDC
≤ 50 nH
≤ 35 pF
KPR 2/4-T227
KPN 2-T227
0.05 Ohms to 5 MOhms
KHR 2/4-T227
KHN 2-T227
200 W
0.35 K/W
10000
max. working voltage (VDC)
1000
100
10
1
10 Ohm
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
backplate
terminals
100 Ohm
1 kOhm
5 kOhm
10 kOhm 100 kOhm
-55 to 155°C
Thick Film
Al
2
O
3
Epoxy or Plastic
Cu tinned
2 or 4
1.5 Nm
1.3 Nm
Part Number - Resistance - Tolerance
Standard: KHR 2-T227 10 Ohms 5% / Special: KHR 2-T227 10 Ohms 5% 2.5 kVDC
Document Number: 64211
Revision: 20-09-10
For technical questions, contact:
powertron@vishaypg.com
www.powertron.de
1
Ordering Information
KPR KPN KHR KHN T227
Powertron
SPECIFICATIONS
(continued)
Temperature Coefficient
100ppm/K
7000
∆R/R (ppm)
50ppm/K
2000
-3000
-8000
-50
-25
0
Temperature (°C)
25
50
75
100
125
Derating
120
Power Rating Notes -
Power ( % from
nominal power)
100
80
60
40
20
0
50
75
85
100
115
130
145
155
Temperature of the backplate (°C)
The KPR / KPN / KHR / KHN Series Resistors must be at-
tached to a suitable heatsink. The maximum internal resistor
temperature is 155°C.
To specify an appropriate heatsink use the following formula :
R
qH
= T
MAX
- ( P x R
qR
) - T
A
P
Where:
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 )
Pulse Stability
10kJ
3kJ
1kJ
300J
Pulse Energy
100J
30J
10J
3J
1J
0,3J
0,1J
0,
01
0,
02
0,
05
0,
1
0,
2
00
02
00
05
0,
5
10
20
50
1
2
5
1
2
5
00
00
0,
0,
0,
0,
0,
00
10
0
Pulse time (s)
www.powertron.de
2
For technical questions, contact:
powertron@vishaypg.com
Document Number: 64211
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
Vishay Precision Group products. It is the customer’s responsibility to validate that a particular product with the
properties described in the product specification is suitable for use in a particular application.
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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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Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
1
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