Designed in both Edgewound
and Round Wire formats,
these rugged resistors
PFE and PFR Series
Powr-Rib® Edgewound
Edgewound and Round Wire
can handle 700 to 1000
Watts of power. Specify our
Edgewound design for very
low resistance and high power
capacity. When higher resis-
tance with lower power capac-
ity is required use our Round
Wire design.
Standard:
Terminal 2172B (30 amps & more)
A
B
17.875" ±.063
454.02 mm
2.313"
1.00"
25.400 mm
58.750 mm
16.250" ±.063
412.75 mm
Terminal 2172G (29 amps & less)
These resistors are con-
PFE5K
structed of a heavy resistance
alloy mounted on ceramic
insulators and supported by
a metal mounting bracket.
Metal parts, except for the
resistance element, are heav-
ily plated to prevent oxidation
at high operating temperatures
and to prevent corrosion. The
mounting bar is slotted on
each end to facilitate installa-
tion. Edgewound units provide
clamp-type terminals, permit-
ting a reliable connection
which can be moved along
the resistive element to obtain
intermediate values.
Edgewound
0.531"
13.494 mm
1.688"
42.875 mm
1.00"
25.400 mm
0.531"
13.494 mm
0.750"
19.050 mm
Standard:
A
B
17.875" ±.063
2.063" -0/+.187
52.400 mm -0/+4.763
454.02 mm
1.00"
25.400 mm
16.250" ±.063
412.75 mm
Terminal 2175
(standard on
8.3 amps & less)
PFR5K
Round wire
0.531"
13.494 mm
2.625" -0/+.187
66.67 mm -0/+4.763
1.00"
25.400 mm
Terminal 2176
(optional for 90°
terminal mounting)
0.531"
13.494 mm
0.750"
19.050 mm
All values for reference only; Consult factory for details.
S P E C I F I C A T I O N S
Electrical
Current Rating: Continuous duty
as listed on following page.
Wattage Rating: 700 to 1,000 (up
to 1,600 watts on special order)
Resistance Tolerance: ±10%
standard, ±5% available
Terminals: Clamps, movable
along resistor wire for setting
intermediate resistance values
on Edgewound units (current
must be derated in proportion).
Temperature Coefficient:
±300 ppm/°C for resistors 50
amps and more
±500 ppm/°C for resistors 47
amps or less
Ohmic Values: See chart on fol-
lowing page.
Mounting: Metal mounting bar is
slotted on each end to facilitate
installation.
Short Term Overload: 10x rated
wattage for five seconds
D E R A T I N G
O R D E R I N G I N F O R M AT I O N
100
80
60
40
20
RoHS Compliant
P F E 5 K R 1 0 0 E
Style
# of
Tolerance Ohms
PFE = Edgewound Sections K = 10%
R100 = 0.10
1R00 = 1.0
10R0 = 10
PFR = Roundwire
2
3
4
8
5
6
7
0
0 2550 100 150 200 250 300 350
Ambient Temperature, °C
S TA N D A R D P A R T N U M B E R S
EDGEWOUND
Part #
ROUNDWIRE
Part #
Ohms
Watts Amps
Ohms
Watts Amps
0.1
0.12
PFE5KR100E 1000 100
PFE5KR120E 994 91
11
13
17
20
25
PFR5K11R0E 757 8.3
PFR5K13R0E 750 7.6
PFR5K17R0E 740 6.6
PFR5K20R0E 696 5.9
0.14 PFE5KR140E 1100 89
0.16
0.18
PFE5KR160E 973 78
PFE5KR180E 1012 75
PFR5K25R0E 650 5.1
0.22 PFE5KR220E 1017 68
0.25 PFE5KR250E 992 63
0.3
PFE5KR300E 975 57
Ordering Information
See Part Number chart for stan-
dard resistance values when
ordering.
0.33 PFE5KR330E 962 54
0.37 PFE5KR370E 925 50
0.5
0.6
PFE5KR500E 1105 47
PFE5KR600E 1109 43
= Standard values
= Non-standard values subject
to minimum handling
charge per item.
0.67 PFE5KR670E 1126 41
0.75 PFE5KR750E 1141 39
1
PFE5K1R00E 1089 33
1.3
1.6
2.2
2.8
3.5
PFE5K1R30E 1093 29
PFE5K1R60E 1082 26
PFE5K2R20E 745 18.4
PFE5K2R80E 744 16.3
PFE5K3R50E 746 14.6
Check product availability at
www.ohmite.com
4.5
5.4
6.8
8.5
PFE5K4R50E 726 12.7
PFE5K5R40E 752 11.8
PFE5K6R80E 721 10.3
PFE5K8R50E 751
9.4
48
Ohmite Mfg. Co. 1600 Golf Rd., Rolling Meadows, IL 60008 • 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
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