PL IA NT CO M *R oH S Features ■ For trimmer applications/processing ■ Multiturn / Wirewound / Sealed ■ Listed on the QPL for style RT22 per guidelines, click here MIL-R-27208 and RTR22 per High-Rel MIL-R-39015 ■ Panel mount option available ■ RoHS compliant* 3250 - 1/2 ” Square Trimpot® Trimming Potentiometer Electrical Characteristics Standard Resistance Range .................................. 10 to 50K ohms (see standard resistance table) Resistance Tolerance ............. ±5 % std. (tighter tolerance available) Absolute Minimum Resistance .......................... 0.1 % or 1 ohm max. (whichever is greater) Noise .....................100 ohms ENR max. Resolution ........... See Resistance Table Insulation Resistance ............... 500 vdc. 1,000 megohms min. Dielectric Strength Sea Level............................. 1,000 vac 80,000 Feet ............................ 400 vac Adjustment Travel .............25 turns nom. Environmental Characteristics Power Rating @ 85 °C ............... 1.0 watt Power Rating @ 150 °C ................ 0 watt Temperature Range ... -65 °C to +150 °C Temperature Coefficient ..... ±50 ppm/°C Seal Test ...................... 85 °C Fluorinert† (pin styles only) Humidity .......MIL-STD-202 Method 106 (2 % ΔTR; 100 Megohms IR) Vibration ......................................... 30 G (1 % ΔTR; 0.5 % + resolution ΔVR) Shock ........................................... 100 G (1 % ΔTR; 0.5 % + resolution ΔVR) Load Life ............ 1,000 hours 1.0 watt @ 85 °C (2 % ΔTR; 500 ohms ENR) Rotational Life .......................200 cycles (2 % ΔTR; 500 ohms ENR) Physical Characteristics Torque............................. 5.0 oz-in. max. Mechanical Stops ................. Wiper idles Terminals ..Solderable printed circuit pins Flexible leads (7 strands of 30 AWG) Weight ....................................... 0.06 oz. Machine Screw Mounting Torque .......................... 12 oz-in. max. Marking.........Manufacturer’s trademark, resistance code, terminal numbers, date code, manufacturer’s model number and style Wiper ............... 50 % (Actual TR) ±10 % Flammability ..........................U.L. 94V-0 Standard Packaging P&W Styles ...............25 pcs. per tube L Style ........................25 pcs. per bag Adjustment Tool..............................H-90 Product Dimensions How To Order 3250 L - 1 - 103 M 3250P Common Dimensions (Pin Styles) Model 1.98 DIA. THRU (.078) (2 PLACES) ADJ. SLOT 1.91 ± .25 (.075 ± .01) DIA. .64 WIDE X (.025) .51 DEEP X (.020) 13.21 TYP. (.520) 12.7 TYP. (.500) .89 (.035) TYP. 2.54 (.100) 2.54 (.100) 6.35 (.250) 1.78 TYP. (.070) .71 ± .08 (.028 ± .003) DIA. TYP. 5.59 (.220) 3 12.7 (.500) TYP. 2 1 13.33 ± .64 (.525 ± .025) 2.54 (.100) 6.35 (.250) 3250W 2.79 (.110) 3 2 1 2.54 (.100) 6.35 2.54 (.250) (.100) 3250W-66 Standard or Modified Product Indicator -1 = Standard Product Resistance Code Optional Suffix Letter M = Panel Mount (Factory Installed) Consult factory for other available options. Standard Resistance Table Resistance (Ohms) 10 20 50 100 200 500 1,000 2,000 5,000 10,000 20,000 25,000 50,000 RED 1 2.54 (.100) 2.54 (.100) 6.35 (.250) Resistance Code 100 200 500 101 201 501 102 202 502 103 203 253 503 YELLOW CCW 13.21 TYP. (.520) 2 WIPER 3 1 CLOCKWISE DIMENSIONS: 3250L Nominal Resolution (Percent) 1.30 1.00 0.80 0.90 0.70 0.60 0.40 0.30 0.25 0.19 0.16 0.14 0.13 Popular values listed in boldface. Special resistances available. 2.79 (.110) 3 2 Style TOLERANCES: ± 0.25 (.010) GREEN CW MM (INCHES) EXCEPT WHERE NOTED 2.36 DIA. THRU (.093) (2 PLACES) .89 TYP. (.035) 12.70 TYP. (.500) 1.40 (.055) 4.75 (.187) 1.52 (.060) TYP. 152.4 LENGTH (6.00) MIN. 12.7 (.500) REV. 01/12 *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. “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.