KPR KHR 2-T227
FEATURES
•
•
•
•
•
Resistances from 0.05Ohm to 5MOhms
Power Rating to 200Watt
Resistance Tolerances to ±1%
TCR to ±50ppm/K
TO-227 (TO-238) Housing
TABLE 1—SPECIFICATIONS
TYPE
Resistance Range
Power rating
With heatsink
Tolerances
from 0.05 Ohms
from 0.1 Ohms
Thermal Resistance Rthj-c
Stability (1000h)
Temperature Coefficient
0.05 to 0.099 Ohms
0.1 to 5 MOhms
Voltage Proof
Inductivity
Capacity
100W
2% / 5% / 10%
1% / 2% / 5% / 10%
0.7 K/W
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
10000
KPR 2-T227
200W
KHR 2-T227
0.05 Ohms to 5 MOhms
0.35 K/W
max. working voltage (VDC)
1000
Max. Voltage
depending on resistance value
100
10
1
10 Ohm
100 Ohm
1 kOhm
5 kOhm
10 kOhm 100 kOhm
Operating Temperature Range
Resistor Material
Substrate
Housing
Connector Material
Terminals
Max. Torque
backplate
terminals
-40 to 155°C
Thick Film
Al
2
O
3
Epoxy
Cu / tinned
2 (standard contact G - bended)
1.5 Nm
1.3 Nm
ORDERING INFORMATION
Part Number - Resistance - Contact - Tolerance
Standard: KHR 2-T227 10R000 G 5%
Special: KHR 2-T227 12K500 G 5% 2.5 kVDC dia 1
Document No.: 64211
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
1
KPR KHR 2-T227
FIGURE 1—TEMPERATURE COEFFICIENT
100ppm/K
7000
∆R/R (ppm)
50ppm/K
2000
-3000
-8000
-50
-25
0
Temperature (°C)
25
50
75
100
125
FIGURE 2—DERATING
Power Rating Notes -
120
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 )
FIGURE 3—PULSE STABILITY
10kJ
3kJ
1kJ
300J
Pulse Energy
100J
30J
10J
3J
1J
0,3J
0,1J
0,
00
02
0,
00
05
0,
01
0,
02
0,
05
0,
00
1
0,
00
2
0,
00
5
10
0
0,
1
0,
2
0,
5
10
20
50
1
2
5
Pulse time (s)
www.powertron.de
2
For technical questions,
contact
powertron@vpgsensors.com
Document No.: 64211
Revision: 31-01-2015
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Vishay Precision Group, Inc.
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Revision: 15-Jul-2014
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