PF2270 Series
Power Film Resistors
•
•
•
•
•
•
•
•
•
Resistances from 0.1 Ohms to 1M Ohms
Power Rating to 600 Watts
Resistance Tolerances to ±1%
TCR of ±100ppm/C
TO-227 (TO-238) Housing
Moisture Resistant Encapsulation
M4x5mm Screws Included
Isolated Back Plate
Excellent Pulse Handling
SPECIFICATIONS
Type
PF2272
PF2274
PF2276
200 W
300 W
600 W
Power Rating (without heatsink)
5W
5W
5W
Additional Lead Configurations
Y/Z
Y/Z
Y/Z
Power Rating (with heatsink)
0.1 to 1M Ohms
Resistance Range
( 0.1 to 1 Ohm only available Terminal Z )
Resistance Values
0.1 to 1M Ohms
( 0.1 to 1 Ohm only available Terminal Z )
50 to 1K Ohms
( 0.1 to 1 Ohm only available Terminal Z )
E12 ( Plus 2 Ohm and 5 Ohm )
Thermal Resistance
0.35 °C/W
Tolerances
0.23 °C/W
0.11 °C/W
5% ( 1% optional )
Temperature Coefficient
±100 ppm/°C
Operating Temperature
-55°C to 155°C
Inductance
14 nH
MAX Continuous Voltage
√ (P * R)
MAX Continuous Current
100A
Isolation Voltage
2500VAC (5000VAC on request)
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/s , 10-54Hz, 10X,
±0.25%
2
XYZ )
Insulation Resistance
> 1000 MegOhm
Flammability
UL94 V-0
Substrate
AlO
Alumina / Cu Flange
AlN
Weight (grams)
20
30
30
Torque
Riedon Inc.
© Riedon, Inc.
Terminals: 1.0 Nm Max / 0.6 Nm Recommended
Mounting: 1.6 Nm Max / 1 Nm Recommended
300 Cypress Avenue Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
(626) 284-1704
Revised: 201902_006
PF2270 Series
Power Film Resistors
SPECIFICATIONS (continued)
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
0.4
0.465
0.016
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
*0.25 mm tolerance availble (-T)
Mounting Notes The PF2270 Series Power Film Resistors must be attached to
a suitable heatsink. Mount resistor using thermal grease to a
clean, flat surface. Use a compression washer to provide 150 to
300 pounds ( 665 to 1330N ) of mounting force. Torque mounting screw to 8 in-lbs ( 0.9 N-m ). Torque termination screws to 5
in-lbs (0.6 N-m).
Back plate is isolated from both pins.
Terminal Configuration & Schematics
4
3
4
3
4
3
1
2
1
2
1
2
STANDARD
PF2272
PF2274
PF2276
Y
PF2272Y
PF2274Y
PF2276Y
Power Rating Notes The PF2270 Series Power Film 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 :
RHH =
TMAX - (P * RHR) - TA
P
Where: 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 )
Riedon Inc.
© Riedon, Inc.
Z
Note: Style Z is not a true
4-terminal measurement.
Current can be applied to
any pins
PF2272Z
PF2274Z
PF2276Z
PF2270 Series Power Derating Curve
% Rated Power
85 °C
100
Slope 0.35 °C/W
80
60
125 °C
40
155 °C
20
0
-50
0
50
100
150
Base Temperature (°C)
300 Cypress Avenue Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
200
(626) 284-1704
Revised: 201902_006
PF2270 Series
Power Film Resistors
SPECIFICATIONS (continued)
Pulse Durability PF2272 10 OHM 1%
1000
1 00
1 00
.
10
1
0.1
200W
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
Pulse Width (seconds)
10
100
Pulse Durability PF2276 100 OHM 1%
1000
Pulse Peak Power (kW)
Pulse Peak Power (kW)
Pulse Peak Power (kW)
1000
Pulse Durability PF2274 10 OHM 1%
10
1
300W
0.1
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
Pulse Width (seconds)
10
100
Tentative continuous pulse power allowance at duty
0.01. Load life test will be necessary in actual equipment because curve may be changed by resistance,
repetition, duty, and operating temperature. Dotted line
shows estimation.
1 00
10
1
600W
0.1
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
Pulse Width (seconds)
10
100
Note: Flying lead terminations are available for enhanced
clearance and creepage. Please contact factory for details.
Ordering Information
Part Description: Part Type - Terminal Style - Resistance - Tolerance
PF2274Y 10 Ohms 5%
Part Type
Terminal Style
Resistance
Tolerance
PF 2272
(*)
0.1 to 100K Ohms
5%
PF 2274
Y
50 to 1K Ohms
(**)
PF 2276
Z
Riedon Inc.
© Riedon, Inc.
(*) For standard terminal style omit letter
(**) 1% Tolerance Optional
300 Cypress Avenue Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
(626) 284-1704
Revised: 201902_006
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