Features
■ 1-1/4” Rectangular / Multiturn
Wirewound / Industrial / Sealed
■ Panel mount option available
(see page 72 for details)
3057 - Trimpot® Trimming Potentiometer
3057L
Common Dimensions
3057Y
Electrical Characteristics
Standard Resistance Range
31.75
(1.25)
.....................................10 to 50K ohms
(see standard resistance table)
Resistance Tolerance ...............±5% std.
(tighter tolerance available)
3.18
(.125 )
25.4
(1.000)
1.47 ± .56
(.058 ± .022)
1
2
7.62
(.300)
3
Absolute Minimum Resistance
6.35
(.250)
..............................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.
17.78
(.700)
ADJ. SLOT
2.92 ± .38
(.115 ± .015)
DIA.
2.36
(.093)
MTG. HOLES (2)
DIA.
.64
(.025)
WIDE
X
X
2.54
(.100)
.79
DEEP
(.031)
4.83
(.190)
.71 ± .03
(.028 ± .001)
Dielectric Strength
DIA. TYP.
Sea Level ...............................1,500 vac
70,000 Feet...............................400 vac
Adjustment Travel .............22 turns nom.
12.70 ± .79
(.500 ± .031)
6.10
(.240)
MIN. LENGTH
TYP.
6.10
TYP.
152.4
LEADS
(.240)
(6.000)
8.00 ± .38
(.315 ± .015)
2.54
(.100)
Environmental Characteristics
Power Rating @ 70°C....................1 watt
Power Rating @ 150°C..................0 watt
Temperature Range ......-55°C to +150°C
Temperature Coefficient .......±50ppm/°C
Seal Test ........................85°C Fluorinert*
(pin styles only)
2.67
(.105 )
3.43 ± .38
(.135 ± .015)
RED
WIPER
2
3057J
Humidity........MIL-STD-202 Method 106
96 hours
GREEN
CW
YELLOW
CCW
3
1
3.80
(.150)
CLOCKWISE
2% ∆TR, 100 Megohms IR)
Vibration .................30G (1% ∆TR; 0.5%
+ resolution ∆VR)
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
2
1
3
Shock ...................100G (1% ∆TR; 0.5%
+ resolution ∆VR)
Load Life .....1,000 hours 1 watt @ 70°C
(2% ∆TR)
METRIC
(INCHES)
DIMENSIONS ARE:
6.35
(.250)
7.62
(.300)
Rotational Life ........200 cycles (2% ∆TR)
17.78
(.700)
Standard Resistance Table
.71 ± .03
DIA. TYP.
(.028 ± .001)
Physical Characteristics
Nominal
Torque .............................5.0 oz-in. max.
Mechanical Stops..................Wiper idles
Terminals .........Solderable pins and lugs
Flexible leads ......(7 strands of 30 AWG)
Weight ........................................0.10 oz.
Marking .........Manufacturer’s trademark,
resistance code, terminal numbers,
date code, manufacturer’s model
number and style
Wiper ...............................Set at CW end
Flammability...........................U.L. 94V-0
Standard Packaging
P&Y Style ....................10 pcs. per tube
L&J Style ......................25 pcs. per bag
Adjustment Tool ..............................H-90
Resistance
(Ohms)
Resistance
Code
Resolution
(Percent)
2.54
(.100)
10
100
200
500
101
201
501
102
202
502
103
203
503
2.40
1.90
1.40
1.00
0.86
0.89
0.72
0.58
0.43
0.34
0.31
0.24
20
3057P
50
100
.71 ± .03
(.028 ± .001)
DIA. TYP.
200
500
1,000
2,000
5,000
10,000
20,000
50,000
2
1
3
17.78
(.700)
6.60
12.70 ± .79
(.260) (.500 ± .031)
22.86
(.900)
Popular values listed in boldface. Special
resistances available.
How To Order
SHADED AREAS TYPICALLY NOT STOCKED BY
DISTRIBUTORS AND NOT RECOMMENDED FOR NEW
DESIGNS.
3057 L - 1 - 103 M
Model
Style
*”FLUORINERT” IS A REGISTERED TRADEMARK OF 3M CO.
Standard or Modified
Product Indicator
-1 = Standard Product
Resistance Code
Optional Suffix Letter
M = Panel Mount
(Factory Installed)
Specifications are subject to change without notice.
10
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
