KPR KHR 4-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
Stability (1000h)
Temperature Coefficient
0.05 to 0.099 Ohms
0.1 to 5 MOhms
Voltage Proof
Inductivity
Capacity
100 W
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 4-T227
200 W
KHR 4-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
Plastic
Cu / tinned
4 (Standard contact G - bended)
1.5 Nm
1.3 Nm
ORDERING INFORMATION
Part Number - Resistance - Contact - Tolerance
Standard: KHR 4-T227 10R000 G 5%
Special: KHR 4-T227 5K000 G 5% 2.5 kVDC
Document No.: 64242
Revision: 31-01-2015
For technical questions,
contact
powertron@vpgsensors.com
www.powertron.de
1
KPR KHR 4-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
100
80
60
40
20
0
50
75
85
100
115
130
145
155
Temperature of the backplate (°C)
Power ( % from
nominal power)
The KPR / KHR Series Resistors must be attached to a suit-
able 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.: 64242
Revision: 31-01-2015
KPR KHR 4-T227
FIGURE 4—DIMENSIONS
in mm (inches)
Dimension
A
±0.5 (±0.020)
B
±0.5 (±0.020)
C
±0.2 (±0.008)
D
±0.2 (±0.008)
E
±0.2 (±0.008)
F
±0.2 (±0.008)
G
±0.2 (±0.008)
H
±0.2 (±0.008)
I
±0.2 (±0.008)
J
±0.2 (±0.008)
K
±0.2 (±0.008)
L
±0.1 (±0.004)
M
N
±0.2 (±0.008)
O
±0.2 (±0.008)
mm
26 (1.02)
38 (1.50)
12.7 (0.50)
4 (0.16)
30 (1.18)
15 (0.59)
4.1 (0.16)
10 (0.39)
8 (0.31)
4 (0.16)
2 (0.08)
0.8 (0.03)
M4
10 (0.39)
11.9 (0.47)
Document No.: 64242
Revision: 31-01-2015
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
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Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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