RIEDON PF2274

PF2270 Series
Thin Film Power Resistors
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Resistances from 0.1 Ohms to 100K Ohms
Power Rating to 600 Watts
Resistance Tolerances to ±1%
TCR of ±100ppm/C
TO-227 (TO-238) Housing
Isolated Back Plate
Dual Resistor Package Available
SPECIFICATIONS
Type
PF2272
Power Rating (with heatsink)
Resistance Range
PF2274
PF2276
200 W
300 W
600 W
0.1 to 100K Ohms
0.1 to 100K Ohms
50 to 1K Ohms
Resistance Values
( 0.1 to 1 Ohm only available Terminal Z )
E12 ( Plus 2 Ohm and 5 Ohm )
Thermal Resistance
0.5 °C/W
0.32 °C/W
Tolerances
0.11 °C/W
5% ( 1% optional )
Temperature Coefficient
±100 ppm/°C
Operating Temperature
-55°C to 155°C
MAX Continuous Voltage
√ (P * R)
MAX Continuous Current
55A
Isolation Voltage
2500VAC
Load Life ( 25°C, 90m ON, 30m OFF, 1000hr )
±1%
Humidity ( 40°C, 90-95% RH, DC0.1W, 1000hr )
±1%
Temp. Cycle ( -55°C 30m, 120°C 30m, 20X)
±1%
Vibration ( 0.75mm, 100m/s2, 10-54Hz, 10X, XYZ )
±0.25%
Insulation Resistance
> 1000 MegOhm
Recommended Mounting Torques
Terminals: 0.6 Nm Backplate: 1.0Nm
Dimension
mm
(±mm)
inches
(±inches)
A
38.0
0.2
1.50
0.008
B
25.0
0.2
0.98
0.008
C
11.8
0.5
0.47
0.020
D
4.2
0.1
0.165
0.008
E
13.0
0.3
0.512
0.012
F
15.0
0.4
0.591
0.016
G
30.0
0.1
1.181
0.004
H
10.0
0.2
0.394
0.008
Ordering Information
Part Number - Terminal Style - Resistance - Tolerance
PF2274X 10 Ohms 5% 4T
Riedon Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
www.riedon.com
12/10a
PF2270 Series
Thin Film Power Resistors
SPECIFICATIONS (continued)
Available Terminal Styles
4
3
4
3
4
3
1
2
1
2
1
2
Style X
Style Z
Style Y
Standard
Note: Style Z is not a true 4-terminal measurement
Current can be applied to any pins
Power Derating Curve
120
Power ( % )
100
80
60
40
20
0
0
25
50
75
100
125
150
175
200
Ambient Temperature (°C)
Power Rating Notes The PF2270 Series Foil Resistors must be attached to a suitable
heatsink. The maximum internal resistor temperature is 155°C.
To specify an appropriate heatsink use the following formula :
RθH = TMAX - ( P x RθR ) - TA
P
Where:
Riedon Inc.
RθH = Thermal Resistance of Heatsink ( K/W )
RθR = Thermal Resistance of Resistor ( K/W )
TMAX = Maximum Temperature of Resistor
TA = Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
(626) 284-1704
www.riedon.com
12/10a