Series 251 ® Long life, 9mm diameter, composition element, variable resistor Features • 1 million cycle life • Miniature 9 mm size • Multiple rotation angles available • Low rotational torque • Sturdy insert molded PC terminals • Bushing mount or shaftless available • Tap available Electrical and Mechanical Specifications Resistance Range 10 K ohms through 200 K ohms Resistance Tolerance Standard: ± 20% Special: ± 10% and ± 30% available Resistance Taper Linear ± 5% Insulation Resistance 100 megohms minimum @ 250 VDC Operating Temperature -10°C to +70°C Rotational Torque 3 to 10 gf-cm Rotational Life 1,000,000 cycles Power Rating 0.01 watt at 50°C derated to no load at 85°C Maximum Operating Voltage Maximum 50 VAC or 5 VDC Angle of Rotation Total Rotation - With Shaft: 180° No Shaft: 360° Effective Rotation: 38°, 40°, 50°, 60°, 70°, 85°, 90° or 110° available (Typical joystick control use.) Materials Housing: UL 94V-2 Shaft / Bushing: UL 94V-2 Base UL flame class 94HB Shaft Information Flatted, molded shaft Diameter: 3.96 mm or 5.0 mm, depending on shaft trim Mounting Information Bushing mount (unthreaded) Diameter: 7.00 mm Length: 5.00 mm Tap Available 4° angle at 50% rotation optional Other taps available - consult CTS Technical Data Sheet 1251 CTS CORPORATION / MANUFACTURER OF RELIABLE ELECTRONIC COMPONENTS CTS SERIES 251 “T” Shaft Trim Mounting Hole Detail DIMENSION: MM INCH “F” Shaft Trim Mounting Hole Detail DIMENSION: MM INCH No Shaft Hole Placement Detail View from pot mounting side DIMENSION: Order Information 251 Part Number Code For Ordering B 00 0 254 A 1 N 1 Terminal Type B-Straight P.C. “L” Shafts Length 00 - No shaft 12 - 12 mm 15 - 15 mm MM INCH Shafts Trim 0 - No shaft F - 5 mm dia flatted thickness 3.5 mm T - 4 mm dia flatted thickness 3.45 mm Resistance Tol A: ± 10% B: ± 20% C: ± 30% Resistance Code Examples Code Resistance 252 2.5K 253 25K 254 250K 255 2.5Meg Effective Angle 1- 40° 2- 50° 3- 60° 4- 38° 5- 110° 6- 85° 7- 70° 89- 90° Specials 1 - None B - W/bushing Resistance Tap N: No center tap T: 4° tap at center 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-3-99I