KPR KPN
2/4-T227
KHR KHN
2/4-T227
Power Resistors
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
100
Power Rating Notes -
Power ( % from
nominal power)
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
01
02
05
0,
1
0,
2
0,
5
2
5
10
20
50
1
2
5
1
2
5
00
0
00
0
00
00
00
0,
0,
0,
0,
0,
0,
10
rev. 03/2006A
0,
0,
Pulse time (s)
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
Page 63
0
RIEDON [ RIEDON POWERTRON ]
