KPR KPN 2/4-T227
KHR KHN 2/4-T227
Power Resistors
•
•
•
•
•
Resistances from 0.05Ohm to 5MOhms
Power Rating to 200Watt
Resistance Tolerances to ±1%
TCR to ±50ppm/°C
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 °C/W
2% / 5% / 10%
1% / 2% / 5% / 10%
1%
±300 ppm/°C
±100 ppm/°C
upon request ±50 ppm/°C
1.5 kVDC or 2.5 kVDC (upon request)
≤ 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 °C/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
Ordering Information
Part Description: Part Type - Resistance - Tolerance
KHR 2-T227 10 Ohms 5%
Riedon Inc.
06/13
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 62
Power Resistors
KPR KPN
2/4-T227
KHR KHN
2/4-T227
SPECIFICATIONS
(continued)
Temperature Coefficient
100ppm/°C
7000
∆R/R (ppm)
50ppm/°C
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 attached
to a suitable heatsink. The maximum internal resistor tempera-
ture 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,
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)
Riedon Inc.
06/13
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 63
KPR KPN
2/4-T227
KHR KHN
2/4-T227
Power Resistors
SPECIFICATIONS
(continued)
Dimensions and Attachment Variations
Dimension
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
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
KPR/KHR 2-T227
KPR/KHR 4-T227
KPN/KHN 2-T227
KPR/KHR 2-T227 dia1
KPR/KHR 2-T227 dia2
Riedon Inc.
06/13
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
Page 64
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