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 = 0.50Ω bracket on standard shaft CS = 7.5 C Standard Enclosed 1R0 =1Ω model L only (models H, J, G, K, L) EE = 12.5 E Standard Enclosed 7R5 = 7.5Ω EL = 12.5 E Locking Open 250 = 250Ω Mounting: Panels to 0.25” (6.35mm) thick with 0.375-32 bushing and hex nut ES = 12.5 E Standard Open 1K0 = 1,000Ω GS=75G Standard Open (0.094” thick) (or with 10-32 x 0.75 F.H. screws for model L only). 1K75 = 1,750Ω HL=25H Locking Open 4K5 = 4,500Ω HS=25H Standard Open 50K = 50,000Ω 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 pART 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: 5000Ω 10000 –––10K    0.035   0.050  0.070  0.087  0.100  0.122 Model E: 750Ω Model K: 5000Ω 12500 –––12K5    0.031 Model H: 2000Ω Model L: 7500Ω 15000 –––15K    0.029   0.041  0.058 Model J: 5000Ω 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.