PFR5K25R0 Ohmite

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) 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 105 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 9.4 106 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com