Features Model 3266-LTC is obsolete and not recommended for new designs. Model 3266 is preferred. ■ Low TCR ■ Multiturn / Cermet / Industrial / Sealed ■ Standoffs allow thorough PC board Applications washing ■ Patent #4427966 drive mechanism ■ Rheostat applications with wiper currents less than 25 microamps ■ Process control instrumentation ■ Power supplies 3266-LTC - 1/4 ” Square Trimpot® Trimming Potentiometer Electrical Characteristics Standard Resistance Range ................................ 2 K to 25 K ohms (see standard resistance table) Resistance Tolerance ........... ±10 % std. Absolute Minimum Resistance ........................... 1 % or 2 ohms max. (whichever is greater) Contact Resistance Variation ........................ 3.0 % or 3 ohms max. (whichever is greater) Adjustability Voltage .................................. ±0.02 % Resistance ............................ ±0.05 % Resolution ................................... Infinite Insulation Resistance ............... 500 vdc. 1,000 megohms min. Dielectric Strength Sea Level................................ 600 vac 80,000 Feet ............................ 250 vac Effective Travel .................12 turns nom. Product Dimensions 3266W Common Dimensions 1.24 ±.25** (.049 ±.010) 6.71 ±.38 TYP. (.264 ±.015) ADJ. SLOT 1.78 DIA. (.070) .51 WIDE X (.020) 1.22 ±.25 (.048 ±.010) X .64 DEEP (.025) 4.50 ±.38** (.177 ±.015) 7.24 ±.51 TYP.** (.285 ±.020) 4.78 ±.38** (.188 ±.015) Standard Resistance Table .46 ±.13 (.018 ±.005) 1 2 3 Resistance (Ohms) 2,000 5,000 10,000 20,000 25,000 Resistance Code 202 502 103 203 253 Popular values listed in boldface. Special resistances available. How To Order 3266 W - LTC - 103 .46 ±.03 DIA.** (.018 ±.001) 2.54 2.54 (.100) .76** (.100) E T E L O S B O 2.54 (.100) (.030) Model Style Product Indicator Resistance Code Consult factory for other available options. 1.02 (.040) 3266P Environmental Characteristics Power Rating (300 volts max.) 70 °C .................................... 0.25 watt 150 °C ....................................... 0 watt Temperature Range ............................... -55 °C to +150 °C Temperature Coefficient End to End ...................... ±20 ppm/°C Through the Wiper .......... ±50 ppm/°C Seal Test ......................85 °C Fluorinert† Humidity .......MIL-STD-202 Method 103 96 hours (2 % ΔTR, 10 Megohms IR) Vibration ....... 30 G (1 % ΔTR; 1 % ΔVR) Shock ......... 100 G (1 % ΔTR; 1 % ΔVR) Load Life...1,000 hours 0.25 watt 70 °C (3 % ΔTR; 3 % CRV) Rotational Life .......................200 cycles (4 % ΔTR; 3 % or 3 ohms, whichever is greater, CRV) Physical Characteristics Torque............................. 3.0 oz-in. max. Mechanical Stops ................. Wiper idles Terminals .......................Solderable pins Weight ..................................... 0.015 oz. Marking........................... Manufacturer’s trademark, resistance code, wiring diagram, date code, manufacturer’s model number and style Wiper ..................................50 % ±10 % Flammability ..........................U.L. 94V-0 Standard Packaging .....50 pcs. per tube Adjustment Tool..............................H-90 NOTE: TCR through the wiper applies when 40 % or more of the resistance element is in the circuit. 1.52 (.06) 1 2 3 0.76 ± .25 (.030 ± .010) 4.42 ± .51 (.174 ±.020) 1.02 ±.25 (.040 ±.010) 2.54 ± .25 (.100 ± .010) 2.54 ± .25 (.100 ± .010) 6.48 ±.51 (.255 ±.020) 2.54 ± .25 (.100 ± .010) 3266X 1.24 ±.25 (.049 ±.010) 1.02 (.040) 1.22 ±.25 (.048 ±.010) 1 2 3 .46 ±.13 MIN.** (.018 ±.005) 2.54 (.100) 2.54 (.100) .76 (.030) 2.54 (.100) 1.02 (.040) **Common dimensions 2 CCW WIPER 3 1 CW CLOCKWISE DIMENSIONS: TOLERANCES: ± 0.25 (.010) MM (INCHES) EXCEPT WHERE NOTED REV. 11/09 †“Fluorinert” is a registered trademark of 3M Co. “Trimpot” is a registered trademark of Bourns, Inc. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.