Series 118 (R) Commercial 3/4" (19.1mm) Diameter, 2-Watt, Wirewound Variable Resisters * Fully enclosed construction * Long rotation life * Optional grounded or insulated rotor construction * Incorporated fixed resistor available * Available with nylon shaft Electrical and Mechanical Specifications Resistance Range 1 ohm through 20,000 ohms (linear taper) Resistance Tapers Standard: Linear Resistance Tolerance Standard: 20% Special: 10% Taps None Power Rating, Watts 2 watts @ 55C derated to no load @ 105C, linear taper, bushing mounted control on steel panel 4"x4" x .050" (101.6mm x 101.6mm x 1.27mm). Voltage Rating Terminals to mounting surface (insulated types only): High pot test, one minute -- 900 VAC Operating Maximum -- 500 VDC Across end terminals: Determined by resistance value and wattage rating Incorporated Fixed Resistor A fixed resistor can be incorporated at the end of CW or CCW rotation to a minimum of 15% of the total resistance value. The rotation is shortened by an amount proportional to the ratio of the fixed resistor to the total resistance value. Angle of Rotation Total Rotation: 270 5 Rotational Torque Turning Torque: 1/2 to 10 inch-ounces (36-720 g-cm) Stop Strength: 4 inch-pounds (4.61 Kg-cm) Technical Data Sheet 1448C Technical Data Sheet 1118 CTS CORPORATION / MANUFACTURER OF RELIABLE ELECTRONIC COMPONENTS Electrical and Mechanical Specifications Terminal Information Insulated Construction (Standard) The contactor is insulated from the base and connected to the center terminal on the insulated construction. This construction can be supplied with the center terminal and one end terminal at either end of the resistance element or with the center terminal and terminals at both ends of the resistance element. Grounded Construction (Optional) The grounded construction is supplied without a center terminal and the contactor is connected to the case. This construction can be furnished with one end terminal at either end of the resistance element or with terminals at both ends of the element. Bushing Information Standard: 3/8"-32 NEF-2A thread, .375" (9.53mm) or .250" (6.35mm) long. M9 x 0.75 available. Special: As required in increments of 1/16" (1.58mm) Locating Lugs Standard Position: Left side (with terminals down) supplied, unless otherwise specified. Other Positions: Available with right side only, both left and right, or without lugs. DIMENSION: MM INCH Ordering Information 118 G A 3 32 R 103 B 1 TAPER SERIES MOUNTING DESIGNATION LOCATING LUG 118 -BUSHING 1 - LEFT 2 - RIGHT 3 - NONE SHAFT TRIM R - ROUND F - FLATTED K - KNURLED TERMINAL STYLE J - INSULATED CONSTRUCTION G - GROUNDED CONSTRUCTION MOUNTING STYLE BUSHING A - 1/4" (6.35mm) X 3/8"-32 B - 3/8" (9.53mm) X 3/8"-32 Metric bushings available. Consult CTS. 1 - LINEAR RESIST TOLERANCE A - 10% B - 20% RESISTANCE CODE SHAFT LENGTH 118 SERIES ONLY FROM MOUNTING SURFACE 1/32" INCREMENTS 20 - .625" (15.9mm) 24 - .750" (19.1mm) 28 - .875" (22.2mm) 32 -1.000" (25.4mm) CODE RESISTANCE 100 10 OHMS 500 50 101 100 501 500 102 1K 252 2.5K 502 5K 103 10K 203 20K Order From: CTS CORPORATION, ELECTROCOMPONENTS / 1601 Mishawaka Street / Elkhart, Indiana 46514 North America Toll Free (888) 287-4690 / (219) 296-6700 / FAX: (219) 293-1240 http://www.ctscorp.com CTS COMPONENTS TAIWAN, LTD. / 7, Central 6th Road (Chung Liu Road) / P.O. Box 26-20 Kaohsiung Export Processing Zone / Kaohsiung, Taiwan, Rep. of China (07) 8216145 / FAX: (07) 8417642.8110040 5M-4-99I