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
Current Rating
Continuous duty as listed on follow-
ing page.
Wattage Rating
700 to 1,000 (up to 1,600 watts on
special order)
Resistance
±10% standard, ±5% available
Tolerance
Terminals
Clamps, movable along resistor
wire for setting intermediate resis-
tance values on Edgewound units
(current must be derated in propor-
tion).
Temperature
±300 ppm/°C for resistors 50 amps
Coefficient
and more; ±500 ppm/°C for resis-
tors 47 amps or less
Ohmic Values
See chart on following page
Mounting
Metal mounting bar is slotted on
each end to facilitate installation.
Short Term
10x rated wattage for five seconds
Overload
PFE Edgewound
100
91
89
78
75
68
63
57
54
50
0.033
0.040
0.046
0.052
0.060
0.057
0.070
0.078
0.088
0.100
0.080
0.100
0.110
0.120
0.140
0.100
0.120
0.140
0.160
0.180
0.120
0.140
0.170
0.190
0.210
0.140
0.160
0.200
0.220
0.250
0.160
0.180
0.230
0.250
0.300
Size* (No. of
Insulator-Sections Long)
Dimension A
Dimension B
in.
mm
in.
mm
2
3
4
5 (std.)
6
7
8
8.875
11.875 14.875 17.875 20.875 23.875 26.875
(225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
7.250
10.250 13.250 16.250 19.250 22.250 25.250
(184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
Ohms
Ohms
Ohms
Ohms
Ohms
Ohms
Max. Amps Ohms
Derating
100
Percent Rated Power
80
60
40
20
0
0
25
50 100 150 200 250 300 350
Ambient Temperature,
°C
29
26
18.4
16.3
14.6
47
43
41
39
33
0.070
0.080
0.100
0.110
0.120
0.170
0.210
0.230
0.260
0.350
0.120
0.130
0.160
0.180
0.200
12.7
11.8
10.3
9.4
8.3
7.6
6.6
5.9
5.1
0.450
0.560
0.690
0.880
1.10
1.40
1.70
2.10
2.70
3.4
4.1
5.3
6.3
7.9
0.280
0.330
0.360
0.420
0.560
0.180
0.190
0.230
0.250
0.280
0.730
0.900
1.20
1.50
1.90
2.40
2.90
3.70
4.60
0.380
0.460
0.510
0.580
0.770
1.00
1.20
1.70
2.20
2.70
0.220
0.250
0.300
0.330
0.370
0.500
0.600
0.670
0.750
1.00
1.30
1.60
2.20
2.80
3.50
0.260
0.300
0.360
0.400
0.450
0.600
0.720
0.800
0.900
1.20
1.50
1.90
2.70
3.40
4.30
0.300
0.350
0.420
0.470
0.530
0.700
0.850
0.930
1.05
1.40
1.75
2.20
3.10
4.00
5.10
0.340
0.400
0.480
0.540
0.610
0.800
0.980
1.06
1.20
1.60
2.00
2.50
3.50
4.60
5.90
3.50
4.20
5.30
6.50
8.5
10.0
13.0
15.4
19.3
4.50
5.40
6.80
8.50
11.0
13.0
17.0
20.0
25.0
5.50
6.60
8.30
10.40
13.5
15.9
20.8
24.5
30.7
6.50
7.80
9.80
12.3
16.0
18.8
24.6
29.0
36.4
7.50
9.00
11.3
14.2
18.5
21.7
28.4
33.5
42.1
PFR Round-Wire
5.9
7.1
9.2
10.9
13.6
*Standard 5-section units are stocked; part numbers are listed on the following page.
(continued)
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105
PFE and PFR Series
Powr-Rib® Edgewound
Edgewound and Round Wire
dimEnSionS
Standard:
A
17.875"
±.063
454.02 mm
B
16.250"
±.063
412.75 mm
Terminal 2172B
(30 amps & more)
1.00"
25.400 mm
2.313"
58.750 mm
Terminal 2172G
(29 amps & less)
1.688"
42.875 mm
PFE5K
Edgewound
1.00"
25.400 mm
0.531"
13.494 mm
0.531"
13.494 mm
0.750"
19.050 mm
PFR5K
Round wire
1.00"
25.400 mm
Standard:
A
17.875"
±.063
454.02 mm
B
16.250"
±.063
412.75 mm
1.00"
25.400 mm
0.531"
13.494 mm
2.063" -0/+.187
52.400 mm -0/+4.763
All values for reference only;
Consult factory for details.
Terminal 2175
(standard on
8.3 amps & less)
2.625" -0/+.187
66.67 mm -0/+4.763
Terminal 2176
(optional for 90
ϒ
terminal mounting)
0.531"
13.494 mm
0.750"
19.050 mm
Size (No. of
Insulator-Sections Long)
Dimension A
Dimension B
in.
mm
2
3
4
5 (std.)
6
7
8
in.
mm
7.250
10.250
13.250
16.250
19.250
22.250
25.250
(184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)
8.875
11.875
14.875
17.875
20.875
23.875
26.875
(225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)
how to oRdER
RoHS Compliant
Ohms
EDgEWOuND
Part #
Watts Amps
Ohms
ROuNDWIRE
Part #
Watts Amps
PFE5KR100E
Style
PFE = Edgewound
PFR = Roundwire
# of
Tolerance
Sections
K = 10%
2 5
3 6
4 7
8
Ohms
R100 = 0.10
1R00 = 1.0
10R0 = 10
0.1
0.12
0.14
0.16
0.18
0.22
0.25
0.3
0.33
0.37
0.5
0.6
0.67
0.75
1
1.3
1.6
2.2
2.8
3.5
4.5
5.4
6.8
8.5
PFE5KR100E
PFE5KR120E
PFE5KR140E
PFE5KR160E
PFE5KR180E
PFE5KR220E
PFE5KR250E
PFE5KR300E
PFE5KR330E
PFE5KR370E
PFE5KR500E
PFE5KR600E
PFE5KR670E
PFE5KR750E
PFE5K1R00E
PFE5K1R30E
PFE5K1R60E
PFE5K2R20E
PFE5K2R80E
PFE5K3R50E
PFE5K4R50E
PFE5K5R40E
PFE5K6R80E
PFE5K8R50E
1000 100
994 91
1100 89
973 78
1012 75
1017 68
992 63
975 57
962 54
925 50
1105 47
1109 43
1126 41
1141 39
1089 33
1093 29
1082 26
745 18.4
744 16.3
746 14.6
726
752
721
751
12.7
11.8
10.3
9.4
11
13
17
20
25
PFR5K11R0E
PFR5K13R0E
PFR5K17R0E
PFR5K20R0E
PFR5K25R0E
757
750
740
696
650
8.3
7.6
6.6
5.9
5.1
= Standard values
= Non-standard values subject
to minimum handling
charge per item.
106
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