KPRꢀKPN 2/4-T227
KHR KHNꢀ2/4-T227
PowerꢀResistors
SPECIFICATIONS (continued)
Temperature Coefficient
100ppm/K
50ppm/K
7000
2000
-3000
-8000
-50
-25
0
25
50
75
100
125
Temperatureꢀ(°C)
Derating
PowerꢀRatingꢀNotesꢀ-
120
100
80
60
40
20
0
The KPR / KPN / KHR / KHN Series Resistors must be attached
toꢀaꢀsuitableꢀheatsink.ꢀTheꢀmaximumꢀinternalꢀresistorꢀtempera-
tureꢀisꢀ155°C.
Toꢀspecifyꢀanꢀappropriateꢀheatsinkꢀuseꢀtheꢀfollowingꢀformulaꢀ:
RqHꢀ=ꢀTMAXꢀ-ꢀ(ꢀPꢀxꢀRqRꢀ)ꢀ-ꢀTA
ꢀꢀꢀꢀꢀꢀꢀꢀꢀP
Where:ꢀ RqH = Thermal Resistance of Heatsink ( K/W )
ꢀ
ꢀ
ꢀ
ꢀ
RqRꢀ=ꢀThermalꢀResistanceꢀofꢀResistorꢀ(ꢀK/Wꢀ)
TMAXꢀ=ꢀMaximumꢀTemperatureꢀofꢀResistor
TA = Ambient Temperature of Heatsink ( °C )
Pꢀ=ꢀPowerꢀThroughꢀResistorꢀ(ꢀWꢀ)
50
75
85
100
115
130
145
155
Temperature of the backplate (°C)
PulseꢀStability
10kJ
3kJ
1kJ
300J
100J
30J
10J
3J
1J
0,3J
0,1J
1
2
5
0
2
0
5
1
2
5
,
0
0
0
1
2
5
1
2
5
,
,
0
0
0
,
0
0
1
2
5
0
0
0
,
,
0
0
0
0
0
1
0
0
0
,
0
0
0
,
,
0
0
,
,
0
0
0
0
0
Pulse time (s)
Riedon Inc.ꢀ
ꢀ
ꢀ
300ꢀCypressꢀAvenueꢀ
ꢀ
ꢀ
AlhambraꢀCAꢀ91801ꢀ
www.riedon.com
ꢀ(626)ꢀ284-9901ꢀ
ꢀ(626)ꢀ284-1704
Pageꢀ63
ꢀ
ꢀ
ꢀ
ꢀ
rev.ꢀ03/2006A
RIEDON [ RIEDON POWERTRON ]
