PF2470 Series
TO-247 Power Film Resistors
• TO-247 Housing
• Rated Power to 140 Watts
• Resistances from 0.01 to 51K Ohms
• High Stability Film Resistance Elements
• Resistance Tolerance to ±0.05%
• Low Inductance ( <50nH )
• Isolated Back Plate
SPECIFICATIONS
Resistance Range3
Power Rating
Temperature
Coefficients
Thermal
Resistance
Type
Tolerances
1
2
Heatsink
Free Air
Min
Max
±50ppm/°C ( R≥10W )
±100ppm/°C ( 0.1W ≤ R < 10W )
±250ppm/°C ( R < 0.1W )
±1% ( R≥0.10W )
PF2473
140W
5W
0.9°C/W
1.3°C/W
0.01W
51KW
±5%
±50ppm/°C ( R≥10W )
±100ppm/°C ( 0.1W ≤ R < 10W )
±250ppm/°C ( R < 0.1W )
±1% ( R≥0.10W )
PF2472
100W
3W
0.01W
51KW
±5%
1 Power rating based on 25°C Flange Temperature
2 Power rating based on 25°C Ambient Temperature
3
Consult Factory for Higher or Lower Values
Specification
Value
25A
Maximum Current
Temperature Range
Dielectric Strength
Max. Operating Voltage
Insulation Resistance
-55°C to +155°C
2000 VAC
500 V
>1000 Meg-Ohm
Environmental Performance
Load Life
DR
Test Conditions
±1% + 0.05W
±1% + 0.05W
±0.25% + 0.05W
±0.1% + 0.05W
±0.25% + 0.05W
25°C, 90 min ON, 30 min OFF, 1000 hr
40°C, 90-95% RH, DC 0.1W, 1000 hr
-55°C for 30 min, +155°C for 30 min, 1000 hr
+350°C, 3s
Humidity Resistance
Temperature Cycle
Solder Heat
IEC60068-2-6
Vibration
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
www.riedon.com
(626) 284-9901
(626) 284-1704
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RIEDON [ RIEDON POWERTRON ]
