*R oH V SC AV ER OM AI SIO PL LA N IA BL S NT E Features Model 3296-OT1 is obsolete and not recommended for new designs. ■ 3/8 ” Square/ Multiturn / Cermet Industrial / Sealed ■ Designed for operational amplifier offset voltage adjustment applications ■ Reduces power supply drift errors ■ Unique center tapped trimming potentiometer ■ Vertical and horizontal adjust types available ■ Mounting hardware available ■ RoHS compliant* version available ■ For trimmer applications/processing guidelines, click here 3296-OT1 - 3/8 ” Square Trimpot® Trimming Potentiometer Electrical Characteristics Standard Resistance Range (Pin 1 to Pin 3) ......................100 ohms to 1 megohm (see standard resistance table) Resistance Tolerance ........... ±20 % std. Absolute Minimum Resistance ....................................... 2 ohms max. Voltage Output Variation.......... +0.25 % Adjustability (VR) ................... ±0.025 % Insulation Resistance ............... 500 vdc. 1,000 megohms min. Dielectric Strength Sea Level................................ 900 vac 70,000 Feet ............................ 350 vac Effective Electrical Travel, Nom. ...............................................25 turns Center Tap Resistance ...... 2 ohms max. Center Tap Electrical Center......... ±5 % Center Tap Dead Band ............. 0.5 turn Product Dimensions CLOCKWISE Common Dimensions 6.40 (.252 2 10.03 (.395) 1.52 (.060) .38 MIN. (.015) 1.32 .052) 2.54 (.100) TYP. CCW .51 DIA. (.020) 3 1 4.83 (.190) 1.27 (.05) TYP. 4 9.53 (.375) DIMENSIONS: 1.27 TYP. (.05) ADJ. SLOT 2.19 DIA. (.086) .56 WIDE X (.022) .76 DEEP X (.030) 0.25 (.010) TOLERANCES: ± Physical Characteristics Torque............................. 3.0 oz-in. max. Mechanical Stops ................. Wiper idles Terminals .......................Solderable pins Weight ....................................... 0.03 oz. Marking........................... Manufacturer’s trademark, resistance code, wiring diagram, date code, manufacturer’s model number and style Flammability ..........................U.L. 94V-0 Standard Packaging .......................... 50 pcs. per tube/tray Adjustment Tool..............................H-90 2.41 (.095) 4 3 2 2.54 (.100) 3296X-OT1 .94 (.037) 4 3 2 2.54 (.100) 1 2.41 (.095) MM (INCHES) EXCEPT WHERE NOTED Resistance Code 101 201 501 102 202 502 103 203 503 104 204 504 105 Popular values listed in boldface. Special resistances available. Suggested Offset Voltage Adjustment Circuit +V 3 R3 4 2 R2 1 –V R1 100KΩ BOURNS OFFSET TRIMMER How To Order 3296 X - OT1 - 103 LF Style Resistance Code Terminations LF = 100 % Tin-plated (RoHS compliant) Blank = 90 % Tin / 10 % Lead-plated (Standard) *RoHS Directive 2002/95/EC Jan 27, 2003 including Annex. “Trimpot” is a registered trademark of Bourns, Inc. †“Fluorinert” is a registered trademark of 3M Co. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. 100Ω - 1MΩ Catalog Product REV. 10/11 CENTER TAP Shaded areas typically not stocked by distributors and not recommended for new designs. Model Also see Model 3386-OT1. Resistance (Ohms) 100 200 500 1,000 2,000 5,000 10,000 20,000 50,000 100,000 200,000 500,000 1,000,000 .94 (.037) 1 Environmental Characteristics Power Rating 70 °C ...................................... 0.5 watt 125 °C ....................................... 0 watt Temperature Range ... -55 °C to +125 °C Temperature Stability (ΔVR) ....................................... ±0.5 % max. Seal Test ......................85 °C Fluorinert† Humidity .......MIL-STD-202 Method 103 96 hours ................ 10 megohms min. Vibration, 20 G....................... ±1 % ΔTR Shock, 100 G......................... ±1 % ΔTR Load Life, 1,000 Hours .......... ±3 % ΔTR Rotational Life, 200 cycles .... ±4 % ΔTR CW Standard Resistance Table E T E L O S B O 3296W-OT1 WIPER INPUT + OUTPUT OFFSET ADJUSTMENT RANGE = ±V (R3/R2)