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
M4x5mm Screws Included
Isolated Back Plate
SPECIFICATIONS
Type
Power Rating (with heatsink)
Power Rating (without heatsink)
Additional Lead Configurations
Resistance Range
Resistance Values
Thermal Resistance
Tolerances
Temperature Coefficient
Operating Temperature
Inductance
MAX Continuous Voltage
MAX Continuous Current
Isolation Voltage
Load Life
( 25°C, 90m ON, 30m OFF, 1000hr )
Humidity
( 40°C, 90-95% RH, DC0.1W, 1000hr )
Temp. Cycle
( -55°C 30m, 120°C 30m, 20X)
Vibration
( 0.75mm, 100m/s
2
, 10-54Hz, 10X,
XYZ )
PF2272
200 W
5W
Y/Z
0.1 to 1M Ohms
( 0.1 to 1 Ohm only available Terminal Z )
PF2274
300 W
5W
Y/Z
0.1 to 1M Ohms
( 0.1 to 1 Ohm only available Terminal Z )
PF2276
600 W
5W
Y/Z
50 to 1K Ohms
( 0.1 to 1 Ohm only available Terminal Z )
E12 ( Plus 2 Ohm and 5 Ohm )
0.35 °C/W
0.32 °C/W
5% ( 1% optional )
±100 ppm/°C
-55°C to 155°C
14 nH
√ (P * R)
100A
2500VAC
±1%
±1%
±1%
±0.25%
> 1000 MegOhm
UL94 V-0
AlO
20
Alumina / Cu Flange
30
Terminals: 1.0 Nm Max / 0.6 Nm Recommended
Mounting: 1.6 Nm Max / 1 Nm Recommended
AlN
30
0.11 °C/W
Insulation Resistance
Flammability
Substrate
Weight (grams)
Torque
Riedon Inc.
© Riedon, Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
(626) 284-1704
Revised: 201804_003
PF2270 Series
Power Film Resistors
SPECIFICATIONS
(continued)
Dimension
A
B
C*
D
E
F
G
H
mm
38.0
25.0
11.8
4.2
13.0
15.0
30.0
10.0
( ± mm )
0.2
0.2
0.4
0.1
0.3
0.4
0.1
0.2
inches
1.50
0.98
0.465
0.165
0.512
0.591
1.181
0.394
( ± inches )
0.008
0.008
0.016
0.008
0.012
0.016
0.004
0.008
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 mount-
ing 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.
*0.25 mm tolerance availble (-T)
Terminal Configuration & Schematics
4
3
4
3
4
3
2
Z
PF2272Z
PF2274Z
PF2276Z
1
PF2272
PF2274
PF2276
Power Rating Notes -
2
1
Y
PF2272Y
PF2274Y
PF2276Y
2
1
STANDARD
Note: Style Z is not a true 4-terminal measurement
Current can be applied to any pins
PF2270 Series Power Derating Curve
％
Rated Power
100
80
60
40
20
0
-50
0
50
100
150
155 °C
85 °C
Slope 0.35 °C/W
125 °C
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 :
R
H
H
=
Where:
T
MAX
- (
P
*
R
H
R
) -
T
A
P
R
θ
H
= Thermal Resistance of Heatsink ( K/W )
R
θ
R
= Thermal Resistance of Resistor ( K/W )
T
MAX
= Maximum Temperature of Resistor
T
A
= Ambient Temperature of Heatsink ( °C )
P = Power Through Resistor ( W )
200
Base Temperature (°C)
Riedon Inc.
© Riedon, Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
(626) 284-1704
Revised: 201804_003
PF2270 Series
Power Film Resistors
SPECIFICATIONS
(continued)
Pulse Durability PF2272 10 OHM 1%
1000
Pulse Peak Power (kW)
1 00
.
Pulse Durability PF2274 10 OHM 1%
1000
Pulse Peak Power (kW)
1 00
10
1
300W
0.1
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
10
100
10
1
0.1
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
10
100
200W
Pulse Width (seconds)
Pulse Width (seconds)
Pulse Durability PF2276 100 OHM 1%
1000
Pulse Peak Power (kW)
1 00
10
1
600W
0.1
1n
10n 100n 1u
10u 100u 1m 1 0m 100m 1
10
100
Tentative continuous pulse power allowance at duty
0.01. Load life test will be necessary in actual equip-
ment because curve may be changed by resistance,
repetition, duty, and operating temperature. Dotted line
shows estimation.
Pulse Width (seconds)
Ordering Information
Part Description: Part Type - Terminal Style - Resistance - Tolerance
PF2274Y 10 Ohms 5%
Part Type
PF 2272
PF 2274
PF 2276
Terminal Style
(*)
Y
Z
Resistance
0.1 to 100K Ohms
50 to 1K Ohms
Tolerance
5%
(**)
(*) For standard terminal style omit letter
(**) 1% Tolerance Optional
Riedon Inc.
© Riedon, Inc.
300 Cypress Avenue
Alhambra CA 91801
(626) 284-9901
www.riedon.com
sales@riedon.com
(626) 284-1704
Revised: 201804_003
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