AH Aluminum Housed Power Resistors
TOKEN
Surface Temperature Versus Power Load (Mounted on heat-sink chassis)
AH-250
150
AH-100
100
50
0
AH-50
AH-25
AH-10
AH-5
2
40
60
80 100
% OF RATED POWER
Ambient Temperature Derating
Derating is required for ambient temperatures
above 25°C, see the graph.
ALUMINUM CHASSIS
120
100
Curve Aluminum Chassis applies to all types when
mounted to specified heat sink.
Curves A, B, C apply to operation of
unmounted resistors.
80
60
40
20
0
A
B
C
● Curves A:
AH 5 and 10 watt unites, unmounted.
● Curves B:
AH 25 watt units, unmounted.
● Curves C:
AH 50, 100 and 250 watt units, unmounted.
25 75 125 175 225 275 325
AMBIENT TEMP(°C)
Reduced Heat Sink Derating
100
90
80
Derating is also required when recommended
heat sink area is reduced.
A
70
60
50
40
30
20
10
0
B
● Curves A:
AH-5 and AH-10 size resistor.
● Curves B:
AH-25 size resistor.
● Curves C:
AH-50, AH-100 and AH-250 size resistor.
C
0
20
40
60
80
100
% OF Recommended Heat Sink Area
18 of 90
Version 2010
rfq token.com.tw
http://www.token.com.tw/
06 of 07
TOKEN [ TOKEN ELECTRONICS INDUSTRY CO., LTD. ]
