M
PL
IA
N
Features
■
Multiturn / Wirewound / Sealed
■
Listed on the QPL
for style
RT22
per
■
For trimmer applications/processing
T
guidelines,
click here
*R
oH
S
CO
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
3250P
Common Dimensions
(Pin Styles)
1.98 DIA. THRU
(.078) (2 PLACES)
ADJ. SLOT
1.91 ± .25
(.075 ± .01) DIA.
.64
WIDE
X
(.025)
.51
DEEP
X
(.020)
2.54
(.100)
2.54
(.100)
6.35
(.250)
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
(Only Available for L, W & X Terminal
Styles)
Consult factory for other available options.
13.21
TYP.
(.520)
12.7
TYP.
(.500)
.89
(.035)
TYP.
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
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
Resistance
Code
100
200
500
101
201
501
102
202
502
103
203
253
503
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
6.35
(.250)
2.54
(.100)
3250W
2
1
3
2.79
(.110)
2.54
(.100)
6.35
2.54 (.250)
(.100)
3250W-66
2
1
3
2.79
(.110)
Popular values listed in boldface. Special
resistances available.
RED
2.54
(.100)
6.35
2.54 (.250)
(.100)
YELLOW
CCW
2
WIPER
1
CLOCKWISE
3
MM
(INCHES)
GREEN
CW
3250L
13.21
TYP.
(.520)
DIMENSIONS:
TOLERANCES: ±
0.25
(.010)
EXCEPT WHERE NOTED
2.36 DIA. THRU
(.093) (2 PLACES)
12.70
TYP.
(.500)
1.40
(.055)
4.75
(.187)
1.52
(.060) TYP.
.89
TYP.
(.035)
152.4
LENGTH (6.00) MIN.
REV. 04/15
*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.
The device characteristics and parameters in this data
sheet can and do vary in different applications and
actual device performance may vary over time.
Users should verify actual device performance in their
specific applications.
12.7
(.500)
DIY/Open Source Hardware
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