1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 105 pfe and pfr series powr-rib? edgewound edgewound and round wire 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 tolerance 10% standard, 5% available terminals clamps, movable along resistor wire for setting intermediate resis - tance values on edgewound units (current must be derated in propor - tion). temperature coefficient 300 ppm/c for resistors 50 amps 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 overload 10x rated wattage for five seconds 100 percent rated powe r ambient te mperature, c 60 20 0 80 40 25 50 150 350 100 0 200 250 300 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 derating 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) max. amps ohms ohms ohms ohms ohms ohms ohms pfe edgewound 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 89 0.046 0.078 0.110 0.140 0.170 0.200 0.230 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 68 0.070 0.120 0.180 0.220 0.260 0.300 0.340 63 0.080 0.130 0.190 0.250 0.300 0.350 0.400 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 50 0.120 0.200 0.280 0.370 0.450 0.530 0.610 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 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 33 0.350 0.560 0.770 1.00 1.20 1.40 1.60 29 0.450 0.730 1.00 1.30 1.50 1.75 2.00 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 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 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 pfr round-wire 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 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 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. (continued)
1-866-9-ohmite ? intl 1-847-258-0300 ? fax 1-847-574-7522 ? www.ohmite.com ? info@ohmite.com 106 pfe and pfr series powr-rib? edgewound edgewound and round wire pfe5kr100e style pfe = edgewound pfr = roundwire # of sections 2 5 3 6 4 7 8 t olerance k = 10% ohms r100 = 0.10 1r00 = 1.0 10r0 = 10 rohs compliant edgewound ohms part # watts amps 0.1 pfe5kr100e 1000 100 0.12 pfe5kr120e 994 91 0.14 pfe5kr140e 1100 89 0.16 pfe5kr160e 973 78 0.18 pfe5kr180e 1012 75 0.22 pfe5kr220e 1017 68 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 0.67 pfe5kr670e 1126 41 0.75 pfe5kr750e 1141 39 1 pfe5k1r00e 1089 33 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 roundwire ohms part # watts amps 11 PFR5K11R0E 757 8.3 13 pfr5k13r0e 750 7.6 17 pfr5k17r0e 740 6.6 20 pfr5k20r0e 696 5.9 25 pfr5k25r0e 650 5.1 = standard values = non-standard values subject to minimum handling charge per item. how to o rder dimensions 2.063" -0/+.187 52.400 mm -0/+4.763 2.313" 58.750 mm 1.00" 25.400 mm 0.531" 13.494 mm 17.875" .063 454.02 mm 16.250" .063 412.75 mm 1.00" 25.400 mm 0.750" 19.050 mm 0.531" 13.494 mm t erminal 2172b (30 amps & more) t erminal 2172g (29 amps & less) pfe5k edg ew ound 1.00" 25.400 mm 0.531" 13.494 mm 17.875" .063 454.02 mm 16.250" .063 412.75 mm 1.00" 25.400 mm 0.750" 19.050 mm 0.531" 13.494 mm pfr5k round wire 2.625" -0/+.187 66.67 mm -0/+4.763 t erminal 2175 (standard on 8.3 amps & less) t erminal 2176 (optional f or 90 ? ter minal mounting) 1.688" 42.875 mm a b a b standard: standard: 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) all values for reference only; consult factory for details.
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