1.98
(.078)
12.7
(.500)
TYP.
TYP.
DIA. THRU
(2 PLACES)
.89
(.035)
TYP.
1.78
(.070)
5.59
(.220)
TYP.
13.33 ± .64
(.525 ± .025)
.71 ± .08
(.028 ± .003)
2.54
(.100)
2.54
(.100)
6.35
(.250)
1
2
3
2.36
(.093)
13.21
(.520)
12.70
(.500)
1.40
(.055)
4.75
(.187)
.89
(.035)
1.52
(.060)
152.4
(6.00)
2.79
(.110)
2
1
3
2
1
3
2.79
(.110)
12.7
(.500)
12.7
(.500)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
2.54
(.100)
6.35
(.250)
6.35
(.250)
6.35
(.250)
DIA. TYP.
TYP.
TYP.
TYP.
TYP.
TYP.
LENGTH MIN.
DIA. THRU
(2 PLACES)
13.21
(.520)
1.91 ± .25
(.075 ± .01)
WIDE
X
X
DEEP
DIA.
ADJ. SLOT
.51
(.020)
.64
(.025)
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
■ RoHS compliant*
■ For trimmer applications/processing
guidelines,
click here
3250 - 1/2 ” Square Trimpot
®
Trimming Potentiometer
*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.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
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 Coeffi cient ..... ±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
1
3
GREEN
CW
CLOCKWISE
YELLOW
CCW
2
WIPERRED
How To Order
3250 L - 1 - 103 M
Model
Style
Standard or Modifi ed
Product Indicator
-1 = Standard Product
Resistance Code
Optional Suffi x Letter
M = Panel Mount
(Factory Installed)
Consult factory for other available options.
REV. 01/12
TOLERANCES: ±
0.25
EXCEPT WHERE NOTED
(.010)
DIMENSIONS:
MM
(INCHES)
3250P
Common Dimensions
(Pin Styles)
3250W
3250W-66
3250L
Standard Resistance Table
Nominal
Resistance Resistance Resolution
(Ohms) Code (Percent)
10 100 1.30
20 200 1.00
50 500 0.80
100 101 0.90
200 201 0.70
500 501 0.60
1,000 102 0.40
2,000 202 0.30
5,000 502 0.25
10,000 103 0.19
20,000 203 0.16
25,000 253 0.14
50,000 503 0.13
Popular values listed in boldface. Special
resistances available.
*RoHS COMPLIANT
