Series 026 (R) Commercial 15/16" (24mm) Diameter, 5-Watt, Wirewound Variable Resistors * Fully enclosed construction * 5-watt power rating * Compact size * Superior resistance stability * Tandem constructions available * Economical * Bushing or twist tab mounting * Available with pull-push and rotary power switches * 3% maximum linearity Electrical and Mechanical Specifications Resistance Range Linear: 1 ohm through 25K ohms Audio: 20 ohms through 10K ohms Resistance Tolerance Standard: 10% Special: Tighter tolerance available in most resistance values Power Rating, Watts o o 5 watts @25 C, 4watts@55 C, derated to o no load at 105 C, linear taper, bushing mounted control on steel panel 4" x 4" x .050" (101.6mm x 101.6mm x 1.27mm). (Derating required on two section controls.) Voltage Rating Bushing to Terminals: High pot test, one minute --- 1,000 VAC Operating maximum --- 500 VDC Across End Terminals: 350 VDC maximum, load not to exceed wattage rating. Operating Temperature o o -10 C to +70 C Resistance Tapers Standard: Linear, 15% audio Special: Consult factory Taps One tap at 50% of resistance and rotation available on resistance values under 5K ohms. Power Switches Available in most constructions. Angle of Rotation Total Rotation: o Without switch --- 300 5 With switch --- 300 o 5 Effective Rotation: Without switch --- 280 o approximate o With switch --- 265 approximate Turning Torque 0.75 to 6.0 IN.OZ. (45 to 360 g-cm) Stop strength Typical 8 to 15 Kg-cm (material dependent) (continued on next page) Technical Data Sheet 1448C Technical Data Sheet 10/28/03 Rev A CTS CORPORATION / MANUFACTURER OF RELIABLE ELECTRONIC COMPONENTS Shaft Information Diameter: .250" (6.35mm) Length: As required. Trim: Round, flatted, knurled or with a screwdriver slot Bushing Information Diameter: 3/8 "-32 UNEF-2A thread. Lengths: Standard bushing: 3/ 8" (9.53mm) or 1/ 4" (6.35mm) Special length: Available as required Metric bushings available. Consult CTS. 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. Radius: Standard: .438" (11.1mm) Special: .531" (13.5mm) available Rotational Life Standard: 10,000 cycles Special : 100,000 cycles Mounting Hardware Available upon request Special Features and Constructions Terminals accepting solderless push-on connectors available. Straight or concentric tandem constructions. Compatible with 450 series, 15/ 16" (24mm) diameter, commercial composition variable resistor and can be combined to make any combination of straight or concentric tandem constructions with or without switch. T026 Metal Shaft, Bushing Mounting, Type "T" Solder Lug Terminals DIMENSION: MM INCH C2-026 Printed Circuit Terminal Options DIMENSION: MM INCH C2-026 Concentric Tandem(Available in Two or More Sections) with Switch DIMENSION: PM-026 Twist Tab Mounting, Molded Rotor(Available in Metal Shafts) DIMENSION: K-026 K-026 MM INCH MM INCH Bushing Mounted, Single Section with Attached K Switch (Pull-On Push Off) DIMENSION: MM INCH Ordering Information 026 T 2 20 R 103 TERMINAL STYLE MOUNTING STYLE SHAFT TRIM T - SOLDER LUG X - PC U - FORMED TO FRONT V - FORMED TO REAR BUSHING LENGTH: 1/8" INCREMENTS R - ROUND F - FLATTED .375" X .156" (9.53MM X 4.0MM) K - KNURLED S - S D SLOT .063" DEEP X .047" WIDE (1.6MM X 1.2MM) EXAMPLES: 2 3 8 1 - .250" (6.35MM) .375" (9.53MM) 1.000" (25.4MM) TWIST TAB MOUNT A - .250" (6.35MM) DIECAST B - .375" (9.53MM) DIECAST BUSHING MOUNT SUPPLIED WITH LOCATING LUG LEFT SIDE TERMINALS DOWN SHAFT LENGTH FROM MOUNTING SURFACE 1/32" INCREMENTS EXAMPLES: 20 - .625" 24 - .750" 28 - .875" 32 - 1.000" (6.35MM) (19.5MM) (22.2MM) (25.4MM) B 1 A 1 RESIST TOL A B C D 10% 20% 30% 5% SPECIALS TAPER RESISTANCE CODE EXAMPLES CODE 5A0 501 102 252 502 103 253 - RESISTANCE 5 OHMS 500 OHMS 1K 2.5K 5K 10K 25K 1 - LINEAR 2 - 15% AUD 3 - 15% CCW AUD 1 - LOCATING LUG LEFT SIDE 2 - LOCATING LUG RIGHT SIDE 3 - NO LOCATING LUG 4 - LOCATING LUG BOTH SIDE SWITCHES FUNCTION CTS TYPE CURRENT RATING A - NONE B - SPST ROTARY TGC 6AMP@125VAC C - DPST ROTARY 027 3AMP@125VAC 1AMP@250VAC D - SPDT ROTARY 028 3AMP@125VAC 1AMP@250VAC E - SPST PULL-PUSH K-FR 3AMP@125VAC F - SPST ROTARY GC-FR 3AMP@125VAC 1AMP@250VAC/DC SWITCHES UL RECOGNIZED FILE NO. E10412 Order From: CTS CORPORATION / 406 Parr Road / Berne, Indiana 46711 TEL: (260)589-3111 / FAX: (260)589-3243 CTS COMPONENTS TAIWAN, LTD. / 7, Central 6th Road / Kaohsiung Export Processing Zone Kaohsiung, Taiwan, Rep. of China TEL: (07) 821-6145 / FAX: (07) 811-0040