unenclosed 0.625 0.531 shaft Model E 15.88 mm 13.49 mm locking Rheostats D B nut 0.125 3.18 mm (Potentiometers) Wirewound 0.25 6.35 mm C standard locking 0.531 shaft shaft Model C 13.49 mm 0.25 0.078 0.406 6.35 mm 1.98 mm Mounting: Panels to 10.32 mm Mounting: Panels 0.125 (3.18mm) thick Locking enclosed to 0.125 (3.18mm) with 0.25-32 bushing and shaft thick with 0.25-32 hex nut (0.063 thick). D bushing and hex 0.25 nut (0.063 thick). 6.4 mm B 0.094 0.625 0.625 B 2.38 mm 15.88 mm 15.88 mm D 0.125 3.18 mm Dimension M Models P, N, R, U P 0.875 22.23 mm 2 N 1.188 30.16 mm 51 mm M M B Standard R 1.5 38.1 mm shaft 0.25 0.25 0.109 U 3 76.2 mm 6.4 mm 6.4 mm 2.78 mm Mounting: Panels 0.375 to 1.25 (31.75mm) 9.53 mm thick with 0.25-20 flat-head screws. D Models H, J, G, K, L 0.375 0.75 0.031 C 1.75 9.53 mm 19.05 mm 0.79 mm 44.5 mm 0.031 bushing 0.79 mm projection 0.25 0.625 holes for 0.25 - 20 thread for 1.563 6.35 mm 15.88 mm no. 8 screws mounting screws 39.7 mm D 0.5 12.7 mm ORDERING INFORMATION 0.031 C 0.79 mm drill 0.188 shaft E = RoHS compliant (4.76 mm) hole locking Series 0.344 in panel Rheostats nut 8.73 mm Wirewound 0.063 RCSR50E Potentiometers holes for: 1.59 mm locking shaft 0.875 no. 2 screws (model H) (only model H Resistance Value* 22.23 mm B Code Watts Model Shaft Core no. 8 screws (J, G, K, L) mounting Example: stocked) CL = 7.5 C Locking Enclosed R50 = 0.50 bracket on standard shaft CS = 7.5 C Standard Enclosed 1R0 =1 model L only (models H, J, G, K, L) EE = 12.5 E Standard Enclosed 7R5 = 7.5 EL = 12.5 E Locking Open 250 = 250 Mounting: Panels to 0.25 (6.35mm) thick with 0.375-32 bushing and hex nut ES = 12.5 E Standard Open 1K0 = 1,000 GS=75G Standard Open (0.094 thick) (or with 10-32 x 0.75 F.H. screws for model L only). 1K75 = 1,750 HL=25H Locking Open 4K5 = 4,500 HS=25H Standard Open 50K = 50,000 JS=50J Standard Open Dimensions for reference only consult factory for details. KS = 100 K Standard Open *Check Table for LS = 150 L Standard Open Since all rheostats/potentiometers are electro-mechanical devices, they Standard See page 93 for NS = 300 N Standard Open are subject to mechanical wear and, therefore, have a finite life. Resistance Values knobs, dials, and PS = 225 P Standard Open and Maximum RS = 500 R Standard Open Models H, J, K, L and N are listed under UL Reexamination Service File other hardware Current Values US = 1000 U Standard Open No. E-10946 and CSA File No. 21309 unless noted otherwise. All rheostats are 10% tolerance. Ohmic Max. Voltage Behind panel Diameter Dimension Rotation Model Type Watts range Core (RMS)* B (In./mm) D (In./mm) C (In./mm) Shaft torque (5) E RES/REL 12.5 1.0-15K open 305 0.688/17.46 0.875/ 22.23 0.594/15.08 1-6 oz. in. 300 H RHS/RHL 25 1.0-25K open 500 1.375/34.93 1.560/ 39.62 0.940/23.88 0.25-0.5 lb. in. 300 J RJS 50 0.5-50K open 750 1.375/34.93 2.31 / 58.67 1.56 /39.62 0.25-2 lb. in. 300 G RGS 75 0.5-50K open 900 1.750/44.45 2.75 / 69.25 1.78 /45.21 0.5-2 lb. in. 300 K RKS 100 0.5-50K open 1000 1.750/44.45 3.125/ 79.38 1.91 /48.51 0.5-2 lb. in. 300 L RLS 150 0.5-50K open 1200 2.000 / 50.8 4.00 /101.60 2.28 /57.91 0.5-3 lb. in. 300 P RPS 225 1.0-30K open 1300 2.125/53.98 5.00 /127.00 2.97 /75.44 2.5-4 lb. in. 310 N RNS 300 1.0-50K open 1225 2.375/60.33 6.00 /152.40 3.44 /87.38 2.5-5 lb. in. 320 R RRS 500 1.0-20K open 1450 2.125/53.98 8.00 /203.20 4.31/109.47 4.5-7 lb. in. 325 U RUS 1000 1.0-20K open 1600 3.000 / 76.2 12.00 /304.80 6.38/162.05 3.5-7 lb. in. 335 C RCS/RCL 7.5 10.0-5K enclosed 305 0.875/22.23 0.515/ 13.08 0.25-3 oz. in. 300 E REE 12.5 1.0-15K enclosed 305 1.219/30.96 1.047/ 26.59 1-6 oz. in. 300 Models H, J, G, and K also available in enclosed versions. RoHS compliant product available. Add E suffix to part number to specify. See Catalog 203 for complete details. Made-to-order rheostats available: Contact nearest Ohmite sales office. * Voltage rating dependent on resistance value. STANDARD p ART NuMbERS FOR RhEOSTATS 7.5W Model C 12.5W Model E 25W Model H 50W 75W 100W 150W 225W 300W 500W 1000W Model J Model G Model K Model L Model P Model N Model R Model U Part No. Prefix Suffix 0.5 R50 10.0 12.3 14.1 17.3 1 1R0 3.53 5.00 7.07 8.66 10 12.3 15.0 17.32 22.3 31.6 1.5 1R5 18.2 25.8 2 2R0 2.50 3.54 5.00 6.12 7.07 8.65 10.6 12.24 15.8 22.4 2.5 2R5 2.24 14.1 20.0 3 3R0 2.04 2.88 5.00 5.75 7.07 8.66 10.00 12.9 18.3 4 4R0 3.53 7.50 8.66 11.2 15.8 5 5R0 1.58 3.88 4.47 5.48 6.71 7.75 10.0 14.1 6 6R0 1.44 2.04 2.88 7.5 7R5 3.16 3.65 4.47 5.49 6.32 8 8R0 1.25 1.77 2.50 7.90 11.2 10 10R 0.86 1.12 1.58 2.74 3.16 3.88 4.74 5.48 10.0 12 12R 2.04 12.5 12R5 6.30 8.95 15 15R 0.71 0.91 1.29 3.163 3.87 4.47 16 16R 1.76 2.17 2.50 5.60 7.90 22 22R 1.50 25 25R 0.55 0.71 1.00 1.73 2.0 2.450 3.00 3.46 4.47 6.33 35 35R 0.46 0.60 0.845 1.19 2.070 40 40R 3.54 50 50R 0.39 0.50 0.707 1.00 1.23 1.41 1.735 2.12 2.45 3.16 4.47 75 75R 0.32 0.40 0.575 1.00 1.15 1.415 1.73 2.00 3.65 80 80R 0.790 2.52 100 100 0.27 0.36 0.500 0.866 1.00 1.225 1.50 1.73 3.16 125 125 0.32 0.445 0.630 2.00 150 150 0.22 0.29 0.575 1.000 1.22 1.41 160 160 175 175 0.27 0.375 1.69 2.39 200 200 0.19 0.25 0.612 0.707 0.865 1.06 1.22 225 225 0.470 2.11 250 250 0.17 0.22 0.316 0.775 1.41 300 300 0.408 0.500 0.575 0.866 1.00 1.83 325 325 1.24 350 350 0.15 0.19 0.267 0.655 400 400 0.433 0.500 0.750 0.866 1.48 500 500 0.12 0.16 0.222 0.316 0.388 0.447 0.548 1.00 1.41 600 600 700 700 0.567 0.655 750 750 0.10 0.13 0.182 0.316 0.365 0.447 0.817 1.15 800 800 0.250 900 900 0.500 0.578 1000 1K0 0.086 0.10 0.155 0.224 0.274 0.316 0.707 1.00 1200 1K2 0.433 0.500 1250 1K25 0.346 1500 1K5 0.071 0.090 0.129 0.224 0.258 0.387 0.447 0.577 0.816 1600 1K6 0.176 1750 1K75 0.358 0.414 1800 1K8 0.288 2000 2K0 0.194 0.224 0.336 0.387 0.500 2250 2K25 0.259 2500 2K5 0.055 0.070 0.100 0.141 0.173 0.200 0.300 0.346 0.447 0.633 3000 3K0 0.224 3500 3K5 0.046 0.060 0.084 0.119 4500 4K5 0.182 = Standard values check availability 5000 5K0 0.039 0.050 0.070 0.100 0.123 0.141 Rheostats are silicone-ceramic coated at and 7500 7K5 0.041 0.058 0.100 0.115 0.141 above the following ohmic values: 8000 8K0 0.079 Model C: all Model G: 5000 10000 10K 0.035 0.050 0.070 0.087 0.100 0.122 Model E: 750 Model K: 5000 12500 12K5 0.031 Model H: 2000 Model L: 7500 15000 15K 0.029 0.041 0.058 Model J: 5000 20000 20K 0.035 0.050 25000 25K 0.032 0.045 Check product availability at 30000 30K 0.041 www.ohmite.com 40000 40K 0.035 50000 50K 0.032 Ohmic value RCS Std. shaft RCL Locking Amps max. RES Std. shaft REL Locking REE Enclosed Amps max. RHS Std. shaft RHL Locking Amps max. RJS Amps max. RGS Amps max. RKS Amps max. RLS Amps max. RPS Amps max. RNS Amps max. RRS Amps max. RUS Amps max.