Rheostats (Potentiometers) Wirewound Model C Max. Ohmic Voltage Behind panel “B" Diameter “D" Dimension “C" Shaft Rotation ModelType Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) (in./mm Ref.) torque (±5°) C RCS/RCL 7.5 10.0-5K enclosed 305 0.875/22.23 0.515/ 13.08 — 0.25-3 oz. in. 300° • See Catalog #203 for complete details. Mounting: Panels to 0.125" (3.18mm) thick with 1/4-32 bushing and hex nut (1/16" thick). 0.531" 13.49 mm Locking shaft 0.25" 6.4 mm D 0.125" 3.18 mm 0.25" 6.4 mm B 0.625" 0.625" 15.88 mm 15.88 mm 0.25" 6.4 mm 0.109" 2.78 mm Standard shaft Model E Max. Ohmic Voltage Behind panel “B" Model Type Watts range Core (RMS)* (in./mm Ref.) E RES/REL 12.5 1.0-15K open 305 0.688/17.46 E REE 12.5 1.0-15K enclosed 305 1.219/30.96 • See Catalog #203 for complete details. unenclosed D 0.625" 15.88 mm 0.125" 3.18 mm 0.25" 6.35 mm Mounting: Panels to 0.125" (3.18mm) thick with 1/4-32 bushing and hex nut (1/16" thick). standard shaft 0.25" 6.35 mm Diameter “D" Dimension “C" Shaft Rotation (in./mm Ref.) (in./mm Ref.) torque (±5°) 0.875/ 22.23 0.594/15.08 1-6 oz. in. 300° 1.047/ 26.59 — 1-6 oz. in. 300° 0.531" shaft 13.49 mm locking nut B C locking shaft 0.078" 1.98 mm 0.406" 10.32 mm enclosed D 0.094" 2.38 mm B Dimensions for reference only; consult factory for details. Since all rheostats/potentiometers are electro-mechanical devices, they are subject to mechanical wear and, therefore, have a finite life. Models H, J, K, L and N are listed under UL File No. E-10946 and CSA File No. 21309 unless noted otherwise. All rheostats are 10% tolerance. 188 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] Rheostats (Potentiometers) Wirewound Models H, J, G, K, L Max. Ohmic Voltage Behind panel “B" Model Type Watts range Core (RMS)* (in./mm Ref.) H RHS/RHL 25 1.0-25K open 500 1.375/34.93 J RJS 50 0.5-50K open 750 1.375/34.93 G RGS 75 0.5-50K open 900 1.750/44.45 K RKS 100 0.5-50K open 1000 1.750/44.45 L RLS 150 0.5-50K open 1200 2.000 / 50.8 • Models H, J, G, and K also available in enclosed versions. Diameter “D" (in./mm Ref.) 1.560/ 39.62 2.31 / 58.67 2.75 / 69.25 3.125/ 79.38 4.00 /101.60 Dimension “C" Shaft Rotation (in./mm Ref.) torque (±5°) 0.940/23.88 0.25-0.5 lb. in. 300° 1.56 /39.62 0.25-2 lb. in. 300° 1.78 /45.21 0.5-2 lb. in. 300° 1.91 /48.51 0.5-2 lb. in. 300° 2.28 /57.91 0.5-3 lb. in. 300° • See Catalog #203 for complete details. 1.75" 44.5 mm D 0.031" 0.79 mm 0.25" 6.35 mm 0.5" 12.7 mm 0.375" 9.53 mm 0.75" 19.05 mm bushing projection 0.625" 15.88 mm 0.031" 0.79 mm drill 0.188" (4.76 mm) hole in panel. washer not included in model L C 0.344" 8.73 mm holes for: no. 2 screws (model H) no. 8 screws (J, G, K, L) mounting bracket on model L only 0.063" 1.59 mm B 0.875" 22.23 mm standard shaft (models H, J, G, K, L) shaft locking nut Mounting: Panels to 0.25" (6.35mm) thick with 3/8-32 bushing and hex nut (3/32" thick) (or with 10-32 x 0.75 flat-head screws for model L only). locking shaft (only model H stocked) M o d e l s P, N , R , U Max. Ohmic Voltage Behind panel “B" Diameter “D" Model Type Watts range Core (RMS)* (in./mm Ref.) (in./mm Ref.) P RPS 225 1.0-30K open 1300 2.125/53.98 5.00 /127.00 N RNS 300 1.0-50K open 1225 2.375/60.33 6.00 /152.40 R RRS 500 1.0-20K open 1450 2.125/53.98 8.00 /203.20 U RUS 1000 1.0-20K open 1600 3.000 / 76.2 12.00 /304.80 • See Catalog #203 for complete details. M P N R U Dimension “M" 0.875" 22.23 mm 1.188" 30.16 mm 1.5" 38.1 mm 3" 76.2 mm Dimension “C" (in./mm Ref.) 2.97 /75.44 3.44 /87.38 4.31/109.47 6.38/162.05 Shaft Rotation torque (±5°) 2.5-4 lb. in. 310° 2.5-5 lb. in. 320° 4.5-7 lb. in. 325° 3.5-7 lb. in. 335° 2" 51 mm B M 0.375" 9.53 mm D Mounting: Panels to 1.25" (31.75mm) thick with 1/4-20 flat-head screws. 0.031" 0.79 mm holes for no. 8 screws /4 - 20 thread for mounting screws 1 C 1.563" 39.7 mm (continued) 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected] 189 Rheostats (Potentiometers) Wirewound o r d e r i ng i n f o rm a t i o n 1000W Model U Amps max. RUS––– 500W Model R RRS––– 300W Model N Amps max. 225W Model P Amps max. * Voltage rating dependent on resistance value. RNS––– Amps max. •Made-to-order rheostats available: Contact nearest Ohmite sales office. Amps max. Amps max. •RoHS compliant product available. Add “E" suffix to part number to specify. RPS––– Amps max. 150W Model L Amps max. 100W Model K RKS––– 75W Model G RGS––– 50W Model J RJS––– Amps max. RHL––– Locking 25W Model H RHS––– Std. shaft Amps max. REE––– Enclosed RES––– Std. shaft RCSR50E *Check table for standard resistance values and maximum current values 12.5W Model E REL––– Locking Amps max. RCL––– Locking RCS––– Std. shaft Part No. Prefix Suffix Ohmic value 7.5W Model C Resistance Value* Example: R50 = 0.50Ω 1R0 = 1Ω 7R5 = 7.5Ω 250 = 250Ω 1K0 = 1,000Ω 1K75 = 1,750Ω 4K5 = 4,500Ω 50K = 50,000Ω E = RoHS compliant Series Rheostats Wirewound Potentiometers RLS––– Code Watts Model Shaft Core CL = 7.5 C Locking Enclosed CS = 7.5 C Standard Enclosed EE = 12.5 E Standard Enclosed EL = 12.5 E Locking Open ES = 12.5 E Standard Open GS = 75 G Standard Open HL = 25 H Locking Open HS = 25 H Standard Open JS = 50 J Standard Open KS = 100 K Standard Open LS = 150 L Standard Open NS = 300 N Standard Open PS = 225 P Standard Open RS = 500 R Standard Open US = 1000 U Standard Open 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 8000 –––8K0 0.079 above the following ohmic values: 10000 –––10K 0.035 0.050 0.070 0.087 0.100 0.122 Model C: all Model G: 5000Ω 12500 –––12K5 0.031 15000 –––15K 0.029 0.041 0.058 Model E: 750Ω Model K: 5000Ω 20000 –––20K 0.035 0.050 Model H: 2000Ω Model L: 7500Ω 25000 –––25K 0.032 0.045 30000 –––30K 0.041 Model J: 5000Ω 40000 –––40K 0.035 50000 –––50K 0.032 190 1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • [email protected]