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AV DI TH AIL ST RO AB RI U LE BU GH TI ON
Features
Multiturn / Wirewound / Sealed Listed on the QPL for style RT22 per MIL-R-27208 and RTR22 per High-Rel MIL-R-39015 Panel Mount option available

3250/RT22/RTR22 - 1/2 " Square Trimming Potentiometer
Electrical Characteristics
Standard Resistance Range 3250 .....................................10 to 50K ohms RT22.....................................50 to 20K ohms RTR22 ................................500 to 20K 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.
3250P/RT22/RTR22 Common Dimensions (Pin Styles) 1.98 DIA. THRU (.078) (2 PLACES) ADJ. SLOT 2.03 .38 (.080 .015) DIA. .64 WIDE X (.024) .89 (.035) TYP. 3.1 DEEP X (.122) 2.54 (.100) 2.54 (.100) 6.35 (.250)
RED YELLOW CCW
2
WIPER
1
CLOCKWISE
3
GREEN CW
13.21 TYP. (.520) 12.7 TYP. (.500)
How To Order
3250 L - 1 - 103 M
Model Style Standard or Modified Product Indicator -1 = Standard Product Resistance Code Optional Suffix Letter M = Panel Mount (Factory Installed)
5.59 (.220) 12.7 (.500) TYP. 13.33 .64 (.525 .025)
1.78 TYP. (.070) .71 .08 (.028 .003) DIA. TYP. 3 2 1
Environmental Characteristics
Power Rating @ 85 C 3250 ..................................................1.0 watt RT22/RTR22 ...................................0.75 watt Power Rating @ 150 C .........................0 watt Temperature Range.............-65 C to +150 C Temperature Coefficient 3250 ...........................................50 ppm/C RT22/RTR22...............................50 ppm/C Seal Test ......85 C Fluorinert* (pin styles only) Humidity ................MIL-STD-202 Method 106 3250 .................(2 % TR; 100 Megohms IR) RT22...................(1 % TR; 10 Megohms IR) RTR22 ..............(1 % TR; 100 Megohms IR) Vibration ...................................................30 G (1 % TR; 0.5 % + resolution VR) Shock .....................................................100 G (1 % TR; 0.5 % + resolution VR) Load Life 3250 ...............1,000 hours 1.0 watt @ 85 C (2 % TR; 500 ohms ENR) RT22 ............1,000 hours 0.75 watt @ 85 C (2 % TR; 2 % + resolution VR) RTR22 ........10,000 hours 0.75 watt @ 85 C (3 % TR; 2 % + resolution TR) Rotational Life.................................200 cycles 3250 ....................(2 % TR; 500 ohms ENR) RT22/RTR22 ..................................(2 % TR)
6.35 (.250)
2.54 (.100)
See "Mil-Spec Numbering System" for RT22/ RTR22 ordering information. Consult factory for other available options.
3250W/RT22/RTR22 2 1 3
2.79 (.110)
Standard Resistance Table
2.54 (.100) 3250W-66/RT22X/RTR22X 3 2 1 2.54 (.100) 6.35 (.250)
2.79 (.110)
2.54 (.100) "L" Flex Lead Type RT22 has mounting slots RTR22 has mounting holes
6.35 2.54 (.250) (.100)
13.21 TYP. (.520)
Resistance (Ohms) 10 20 50 100 200 500 1,000 2,000 5,000 10,000 20,000 25,000 50,000
Nominal Resistance Code 100 200 500 101 201 501 102 202 502 103 203 253 503
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
Physical Characteristics
Torque ......................................5.0 oz-in. max. Mechanical Stops ..........................Wiper idles Terminals 3250..............Solderable printed circuit pins Flexible leads (7 strands of 30 AWG) RT22/RTR22 .......MIL-STD-202; Method 208 Weight .................................................0.06 oz. Machine Screw Mounting Torque .....................................12 oz-in. max. Marking 3250.....................Manufacturer's trademark, resistance code, terminal numbers, date code, manufacturer's model number and style RT22/RTR22 ..............Mil-spec part number Wiper ........................................Set at CW end Flammability....................................U.L. 94V-0 Standard Packaging P&W Styles..........................25 pcs. per tube L Style...................................25 pcs. per bag Adjustment Tool .......................................H-90
2.36 DIA. THRU (.093) (2 PLACES)
Popular values listed in boldface. Special resistances available. SHADED AREAS TYPICALLY NOT STOCKED BY DISTRIBUTORS AND NOT RECOMMENDED FOR NEW DESIGNS.
12.70 TYP. (.500) 1.40 (.055) 4.75 (.187) 1.52 (.060) TYP.
.89 TYP. (.035)
152.4 LENGTH (6.00) MIN.
12.7 (.500)
TOLERANCES: 0.25 (.010) EXCEPT WHERE NOTED DIMENSIONS ARE: MM (INCHES) REV. 02/03 *"FLUORINERT" IS A REGISTERED TRADEMARK OF 3M CO. Specifications are subject to change without notice.

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