PFE and PFR Series
Powr-Rib Edgewound
Edgewound and Round Wire
Designed in both Edgewound and Round
Wire formats, these rugged resistors can
handle 700 to 1000 Watts of power.
Specify our Edgewound design for
very low resistance and high power
capacity. When higher resistance with lower power
capacity is required use our Round Wire design.
These resistors are constructed of a heavy resistance alloy mounted on
ceramic insulators and supported by a metal mounting bracket. Metal parts,
except for the resistance element, are heavily plated to prevent oxidation at high
operating temperatures and to prevent corrosion. The mounting bar is slotted
on each end to facilitate installation. Edgewound units provide clamp-type ter-
minals, permitting a reliable connection which can be moved along the resistive
element to obtain intermediate values.
chaRactERiSticS
Continuous duty as listed on follow- Size* (No. of
Current Rating
Insulator-Sections Long) 2 3 4 5 (std.) 6 7 8
ing page.
Dimension A in. 8.875 11.875 14.875 17.875 20.875 23.875 26.875
Wattage Rating 700 to 1,000 (up to 1,600 watts on
mm (225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
special order)
Dimension B in. 7.250 10.250 13.250 16.250 19.250 22.250 25.250
mm (184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
Resistance 10% standard, 5% available
Tolerance
Max. Amps Ohms Ohms Ohms Ohms Ohms Ohms Ohms
Terminals Clamps, movable along resistor PFE Edgewound
wire for setting intermediate resis-
100 0.033 0.057 0.080 0.100 0.120 0.140 0.160
91 0.040 0.070 0.100 0.120 0.140 0.160 0.180
tance values on Edgewound units
89 0.046 0.078 0.110 0.140 0.170 0.200 0.230
(current must be derated in propor-
78 0.052 0.088 0.120 0.160 0.190 0.220 0.250
75 0.060 0.100 0.140 0.180 0.210 0.250 0.300
tion).
68 0.070 0.120 0.180 0.220 0.260 0.300 0.340
Temperature 300 ppm/C for resistors 50 amps
63 0.080 0.130 0.190 0.250 0.300 0.350 0.400
Coefficient and more; 500 ppm/C for resis-
57 0.100 0.160 0.230 0.300 0.360 0.420 0.480
54 0.110 0.180 0.250 0.330 0.400 0.470 0.540
tors 47 amps or less
50 0.120 0.200 0.280 0.370 0.450 0.530 0.610
Ohmic Values See chart on following page
47 0.170 0.280 0.380 0.500 0.600 0.700 0.800
43 0.210 0.330 0.460 0.600 0.720 0.850 0.980
Mounting Metal mounting bar is slotted on
41 0.230 0.360 0.510 0.670 0.800 0.930 1.06
39 0.260 0.420 0.580 0.750 0.900 1.05 1.20
each end to facilitate installation.
33 0.350 0.560 0.770 1.00 1.20 1.40 1.60
Short Term 10x rated wattage for five seconds
29 0.450 0.730 1.00 1.30 1.50 1.75 2.00
Overload
26 0.560 0.900 1.20 1.60 1.90 2.20 2.50
18.4 0.690 1.20 1.70 2.20 2.70 3.10 3.50
16.3 0.880 1.50 2.20 2.80 3.40 4.00 4.60
Derating 14.6 1.10 1.90 2.70 3.50 4.30 5.10 5.90
12.7 1.40 2.40 3.50 4.50 5.50 6.50 7.50
11.8 1.70 2.90 4.20 5.40 6.60 7.80 9.00
100
10.3 2.10 3.70 5.30 6.80 8.30 9.80 11.3
9.4 2.70 4.60 6.50 8.50 10.40 12.3 14.2
80
PFR Round-Wire
60
8.3 3.4 5.9 8.5 11.0 13.5 16.0 18.5
7.6 4.1 7.1 10.0 13.0 15.9 18.8 21.7
40
6.6 5.3 9.2 13.0 17.0 20.8 24.6 28.4
5.9 6.3 10.9 15.4 20.0 24.5 29.0 33.5
20
5.1 7.9 13.6 19.3 25.0 30.7 36.4 42.1
*Standard 5-section units are stocked; part numbers are listed on the following page.
0
0 2550 100 150 200 250 300 350
Ambient Temperature, C
(continued)
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Percent Rated PowerPFE and PFR Series
Powr-Rib Edgewound
Edgewound and Round Wire
dimEnSionS
Standard:
Terminal 2172B (30 amps & more)
A
17.875" .063
454.02 mm 2.313"
1.00" 58.750 mm
B 16.250" .063
25.400 mm
412.75 mm
Terminal 2172G (29 amps & less)
PFE5K
Edgewound
0.531"
1.688"
13.494 mm
42.875 mm
1.00"
25.400 mm
0.531" 0.750"
13.494 mm 19.050 mm
Standard:
A
17.875" .063
2.063" -0/+.187 All values for reference only;
454.02 mm
52.400 mm -0/+4.763
1.00" Consult factory for details.
B 16.250" .063
25.400 mm
412.75 mm
Terminal 2175
PFR5K
(standard on
Round wire 0.531"
8.3 amps & less)
13.494 mm
2.625" -0/+.187
1.00"
66.67 mm -0/+4.763
Terminal 2176
25.400 mm
(optional for 90
terminal mounting)
0.531" 0.750"
13.494 mm 19.050 mm
Size (No. of
Insulator-Sections Long) 2 3 4 5 (std.) 6 7 8
Dimension A in. 8.875 11.875 14.875 17.875 20.875 23.875 26.875
mm (225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
Dimension B in. 7.250 10.250 13.250 16.250 19.250 22.250 25.250
mm (184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
how to oRdER
EDgEWOuND ROuNDWIRE
RoHS Compliant
Ohms Part # Watts Amps Ohms Part # Watts Amps
0.1 PFE5KR100E 1000 100 11 PFR5K11R0E 757 8.3
PFE5KR100E
0.12 PFE5KR120E 994 91 13 PFR5K13R0E 750 7.6
0.14 PFE5KR140E 1100 89 17 PFR5K17R0E 740 6.6
Style # of
Tolerance Ohms
0.16 PFE5KR160E 973 78 20 PFR5K20R0E 696 5.9
PFE = Edgewound Sections K = 10% R100 = 0.10
PFR = Roundwire 2 5 0.18 PFE5KR180E 1012 75 25 PFR5K25R0E 650 5.1
1R00 = 1.0
3 6 10R0 = 10
0.22 PFE5KR220E 1017 68
4 7
8 0.25 PFE5KR250E 992 63
0.3 PFE5KR300E 975 57
0.33 PFE5KR330E 962 54
0.37 PFE5KR370E 925 50
0.5 PFE5KR500E 1105 47
0.6 PFE5KR600E 1109 43 = Standard values
0.67 PFE5KR670E 1126 41
= Non-standard values subject
0.75 PFE5KR750E 1141 39
to minimum handling
1 PFE5K1R00E 1089 33
charge per item.
1.3 PFE5K1R30E 1093 29
1.6 PFE5K1R60E 1082 26
2.2 PFE5K2R20E 745 18.4
2.8 PFE5K2R80E 744 16.3
3.5 PFE5K3R50E 746 14.6
4.5 PFE5K4R50E 726 12.7
5.4 PFE5K5R40E 752 11.8
6.8 PFE5K6R80E 721 10.3
8.5 PFE5K8R50E 751 9.4
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