r se Is Tro w Idnuower c ssah Is m nuo T cwr s re Ise k ye Ferutae S Resistances from 0.005 to 250kOhms Tolerance to 0.01% High Temperature: -55C to +275C Low TCR: 20ppm/ C Power Rating 5 to 300 Watts Excellent Pulse Handling Non-Inductive windings available Four Terminal Versions Available (Call Factory) a noitacilpp S Motor Control Welding Braking Systems X-Ray p tcudor Syrammu POWER RATING (W 25C) PRODUCT SERIES RESISTANCE FREE DIELECTRIC TEMPERATURE TEMPERATURE 1 (RWC) RANGE () AIR COMMERCIAL MIL STRENGTH COEFFICIENT RANGE a a G1 0.01 to 22K 4.5 7.5 5 1500 VAC >10: 20ppm/C a a G2 0.01 to 47K 7.5 12.5 10 1500 VAC 1 to 10: 50ppm/C - 55C to + 275C b b G3 0.01 to 90K 12 25 20 2500 VAC <1: Call Factory c c G4 0.01 to 250K 20 50 30 3500 VAC 1 For non-inductive windings, divide maximum resistance by 2 TOLERANCE: 0.01 to 10% (1% Standard) a 2 2 Heatsink required: 0.040 1.0 Aluminum Plate, 129 in 832 cm or equiv. b 2 2 Heatsink required: 0.040 1.0 Aluminum Plate, 167 in 1077 cm or equiv. a Velbalia o noitp S (Consult Factory) c 2 2 Heatsink required: 0.059 1.5 Aluminum Plate, 291 in 1877 cm or Special Testing Requirements equiv. Special Pulse Requirements d 2 2 Heatsink required: 0.125 3.2 Aluminum Plate, 294in 1896cm or equiv. e 2 2 Heatsink required: 0.125 3.2 Aluminum Plate, 895 in 5780 cm or Hwo ot o redr equiv. N RWC G1 U 003K8 F S RESISTOR WIRE- WINDINGS PACKAGE CODE, TEMPERATURE RESISTANCE TOLERANCE PACKING WOUND CHASSIS WATTS (COMMERCIAL), COEFFICIENT OF MOUNT RESISTANCE RESISTANCE (TCR) S = Standard G1, 7.5W, 0.01 to 22k U = 20ppm/C 038R0 = 38 T= 0.01% S = Bulk N = Non-Inductive Q = 50ppm/C 003K8 = 3.8K Q= 0.02% G2, 12.5W, 0.01 to 47k Z = Special 038K0 = 38.0K A= 0.05% G3, 25.0W, 0.01 to 90k 380K0 = 380.0K B= 0.1% G4, 50.0W, 0.01 to 250k 003M8 = 3.8M F= 1.0% Letter denotes J= 5.0% decimal place. K= 10.0% 3 6 R = decimal., K 10 , M 10 Remaining 4 digits are significant or placeholders. For Tin/Lead coated leads, add- P to part number. Standard Termination Finish: Matte Tin (Sn) Example P/N: RWCNG1U003K8FS is Resistor Wirewound Chassis Mount, Non-Inductive, 7.5W, 20ppm/C, 3.8K, 1.0%, bulk 40 www.johansondielectrics.comr se Is Tro w Idnuower c ssah Is m nuo T cwr s re Ise m ce Hlacina c Hiretcara Scit S Package Code G1 G2 G3 G4 A (Tolerances) 0.005 0.13 mm 0.444 11.28 0.562 14.27 0.719 18.26 1.563 39.70 B (Tolerances) 0.005 0.13 mm 0.490 12.45 0.625 15.88 0.781 19.84 0.844 21.44 C (Tolerances) 0.031 0.79 mm 0.600 15.24 0.750 19.05 1.062 26.97 1.968 49.99 D (Tolerances) 0.062 1.57 mm 1.125 28.58 1.320 33.53 1.870 47.50 2.760 70.10 E (Tolerances) 0.015 0.38 mm 0.334 8.48 0.430 10.92 0.530 13.46 0.615 15.62 F (Tolerances) 0.015 0.38 mm 0.646 16.41 0.800 20.32 1.080 27.43 1.140 28.96 G (Tolerances) 0.015 0.38 mm 0.320 8.13 0.400 10.16 0.560 14.22 0.615 15.62 H (Tolerances) 0.010 0.25 mm 0.065 1.65 0.075 1.91 0.085 2.16 0.085 2.16 J (Tolerances) Dimensions 0.010 0.25 mm 0.140 3.56 0.190 4.83 0.260 6.60 0.300 7.62 Inches mm K (Tolerances) 0.010 0.25 mm 0.078 1.98 0.093 2.36 0.172 4.37 0.196 4.98 L (Tolerances) 0.005 0.13 mm 0.093 2.36 0.093 2.36 0.125 3.18 0.125 3.18 M (Tolerances) 0.015 0.38 mm 0.078 1.98 0.102 2.60 0.125 3.18 0.125 3.18 N (Tolerances) 0.006 0.15 mm 0.050 1.27 0.080 2.03 0.080 2.03 0.080 2.03 O (Tolerances) 0.062 1.57 mm 0.266 6.76 0.312 7.93 0.438 11.13 0.438 11.13 P (Tolerances) 0.031 0.79 mm 0.245 6.22 0.312 7.92 0.391 9.93 0.422 10.72 Q (Tolerances) 0.002 0.05 mm 0.051 1.30 0.098 2.49 0.098 2.49 0.098 2.49 R (Tolerances) 0.031 0.79 mm 0.085 2.16 0.160 4.06 0.185 4.70 0.185 4.70 MIL-R-39009 / MIL-R-18546 RER-60 / RE-60 RER-65 / RE-65 RER-70 / RE-70 RER-75 / RE-75 41 www.johansondielectrics.com