WW/MWW/NWW/WWS Series Stackpole Electronics, Inc. General Purpose and Precision Wirewound Resistor Resistive Product Solutions Features: WWS offers miniature size at higher power rating High performance for low cost High power to size ratio High temperature silicone coating MWW/NMWW completely molded construction with welded terminations Complete welded terminations Tinned copper leads Available in non-inductive styles Tighter tolerances may be available for non-inductive styles. Contact Stackpole with requirements. Higher operating temperatures available B packaging code denotes bulk packaging - contact Stackpole for package quantities Meets UL94V-0 RoHS compliant Electrical Specifications WW, WWS, MWW (*) Power Rating Power Rating Ohmic Range () and Tolerance Type/Code MIL-R-26 Ref. TCR (ppm/C) 125C 70C 0.1% 0.5% 1% 5% WW12 - 0.4 W 0.5 W 5 - 2K 3 - 2K 5 - 2K WW1 - 1 W 1.1 W 2 - 3K WW1A RW-70 1 W 1.3 W 1 - 5K WW2 RW-69 1.5 W 2.1 W 1 - 10K 0.5 - 10K WWS2 - 2.5 W 2.6 W 1 - 10K 0.5 - 10K WW2A - 2.5 W 2.6 W 1 - 10K 0.5 - 10K WW3 RW-79 3 W 3.2 W 1 - 22K 0.5 - 22K WWS3 - 3 W 3.2 W 3 - 10K 1 - 10K WW3A - 3 W 3.4 W 1 - 30K 0.5 - 30K WW4 - 4 W 4.3 W 1 - 40K 0.5 - 40K < 1 = 90ppm/C WWS4 RW-79 4 W 4.3 W 1 - 22K 0.5 - 22K 1 to 10 = 50ppm/C WW5 RW-67, RW-74 5 W 5.1 W 1 - 50K 0.5 - 50K >10 = 20ppm/C WWS5 - 5 W 5.1 W 1 - 40K 0.5 - 40K WW7 - 6.5 W 7.2 W 1 - 70K 0.5 - 70K WWS7 RW-67, RW-74 6.5 W 7.2 W 1 - 50K 0.5 - 50K WW7B - 7 W 7.7 W 1 - 70K 0.5 - 70K WW10 RW-78 10 W 11 W 1 - 100K 0.5 - 100K WWS10 - 10 W 11 W 1 - 70K 0.5 - 70K MWW1 RW-70 1 W 1.3 W 5 - 2K MWW3 RW-79 3 W 3.2 W 3 - 20K MWW5 RW-67, RW-74 5 W 5.5 W 2 - 40K MWW10 RW-68, RW-74 10 W 11 W 2 - 80K (*) Other resistance values available - contact factory for details. Electrical Specifications Non-Inductive Styles (*) Power Rating Power Rating Ohmic Range () and Tolerance Type/Code MIL-R-26 Ref. TCR (ppm/C) 125C 70C 1% and 5% NWW12 - 0.4 W 0.5 W 10 - 1K NWW1 - 1 W 1.1 W 2 - 1.5K NWW1A RW-70 1 W 1.3 W 1 - 2.5K NWW2 RW-69 1.5 W 2.1 W 1 - 5K NWWS2 - 2.5 W 2.6 W 1 - 5K NWW2A - 2.5 W 2.6 W 1 - 5K NWW3 RW-79 3 W 3.2 W 1 - 11K < 1 = 90ppm/C NWWS3 - 3 W 3.2 W 3 - 5K 1 to 10 = 50ppm/C NWW3A - 3 W 3.4 W 1 - 15K >10 = 20ppm/C NWW4 - 4 W 4.3 W 1 - 20K NWWS4 RW-79 4 W 4.3 W 1 - 11K NWW5 RW-67, RW-74 5 W 5.1 W 1 - 25K NWWS5 - 5 W 5.1 W 1 - 20K NWW7 - 6.5 W 7.2 W 1 - 35K NWWS7 RW-67, RW-74 6.5 W 7.2 W 1 - 25K NWW7B - 7 W 7.7 W 1 - 35K (*) Other resistance values available - contact factory for details. Rev Date: 10/25/2018 1 www.seielect.com This specification may be changed at any time without prior notice marketing seielect.com Please confirm technical specifications before you order and/or use. WW/MWW/NWW/WWS Series Stackpole Electronics, Inc. General Purpose and Precision Wirewound Resistor Resistive Product Solutions Electrical Specifications Non-Inductive Styles (cont.) (*) Power Rating Power Rating Ohmic Range () and Tolerance Type/Code MIL-R-26 Ref. TCR (ppm/C) 125C 70C 1% and 5% NWW10 RW-78 10 W 11 W 1 - 50K NWWS10 - 10 W 11 W 1 - 35K < 1 = 90ppm/C NMWW1 RW-70 1 W 1.3 W 5 - 1K 1 to 10 = 50ppm/C NMWW3 RW-79 3 W 3.2 W 3 - 10K >10 = 20ppm/C NMWW5 RW-67, RW-74 5 W 5.5 W 2 - 20K NMWW10 RW-68, RW-74 10 W 11 W 2 - 40K (*) Other resistance values available - contact factory for details. Mechanical Specifications D Type/Code A B C Unit (1) (Bulk) 0.312 0.062 0.110 0.031 0.025 0.002 1.500 typ. inches WW12 / NWW12 7.92 1.57 2.79 0.79 0.64 0.05 38.10 typ. mm 0.375 0.062 0.110 0.031 0.025 0.002 1.500 typ. inches WW1, WWS2 / NWW1, NWWS2 9.53 1.57 2.79 0.79 0.64 0.05 38.10 typ. mm 0.420 0.062 0.110 0.031 0.025 0.002 1.500 typ. inches WW1A / NWW1A 10.67 1.57 2.79 0.79 0.64 0.05 38.10 typ. mm 0.370 0.062 0.156 0.031 0.032 0.002 1.500 typ. inches WW2, WWS3 / NWW2, NWWS3 9.40 1.57 3.96 0.79 0.81 0.05 38.10 typ. mm 0.550 0.062 0.156 0.031 0.032 0.002 1.500 typ. inches WW2A / NWW2A 13.97 1.57 3.96 0.79 0.81 0.05 38.10 typ. mm 0.560 0.062 0.187 0.031 0.032 0.002 1.500 typ. inches WW3, WWS4 / NWW3, NWWS4 14.22 1.57 4.75 0.79 0.81 0.05 38.10 typ. mm 0.500 0.062 0.218 0.031 0.032 0.002 1.500 typ. inches WW3A / NWW3A 12.70 1.57 5.54 0.79 0.81 0.05 38.10 typ. mm 0.700 0.062 0.270 0.031 0.036 0.002 1.500 typ. inches WW4, WWS5 / NWW4, NWWS5 17.78 1.57 6.86 0.79 0.91 0.05 38.10 typ. mm 0.875 0.062 0.312 0.031 0.036 0.002 1.500 typ. inches WW5, WWS7 / NWW5, NWWS7 22.23 1.57 7.92 0.79 0.91 0.05 38.10 typ. mm 1.000 0.062 0.312 0.031 0.036 0.002 1.500 typ. inches WW7 / NWW7 25.40 1.57 7.92 0.79 0.91 0.05 38.10 typ. mm 1.200 0.062 0.312 0.031 0.036 0.002 1.500 typ. inches WW7B, WWS10 / NWW7B, NWWS10 30.48 1.57 7.92 0.79 0.91 0.05 38.10 typ. mm 1.780 0.062 0.375 0.031 0.040 0.002 1.500 typ. inches (2) WW10 / NWW10 45.21 1.57 9.53 0.79 1.02 0.05 38.10 typ. mm 0.385 0.062 0.135 0.031 0.032 0.002 1.500 typ. inches MWW1 / NMWW1 9.78 1.57 3.43 0.79 0.81 0.05 38.10 typ. mm 0.560 0.062 0.205 0.031 0.032 0.002 1.500 typ. inches MWW3 / NMWW3 14.22 1.57 5.21 0.79 0.81 0.05 38.10 typ. mm 0.925 0.062 0.330 0.031 0.036 0.002 1.500 typ. inches MWW5 / NMWW5 23.50 1.57 8.38 0.79 0.91 0.05 38.10 typ. mm 1.965 0.062 0.480 0.031 0.040 0.002 1.500 typ. inches MWW10 / NMWW10 49.91 1.57 12.19 0.79 1.02 0.05 38.10 typ. mm (1) SeeResistor Packaging Specification Documen for lead length dimension for tape and reel packaged product. (2) Lead diameter (C) available in 0.036 / 0.91mm. Rev Date: 10/25/2018 2 www.seielect.com This specification may be changed at any time without prior notice marketing seielect.com Please confirm technical specifications before you order and/or use.