Features
1-1/4” Rectangular / Multiturn
Wirewound / Industrial / Sealed
s
Panel mount option available
(see page 72 for details)
s
3057 - 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 ...............................1,500 vac
70,000 Feet...............................400 vac
Adjustment Travel .............22 turns nom.
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)
Humidity........MIL-STD-202 Method 106
96 hours
2%
∆TR,
100 Megohms IR)
Vibration .................30G (1%
∆TR;
0.5%
+ resolution
∆VR)
Shock ...................100G (1%
∆TR;
0.5%
+ resolution
∆VR)
Load Life .....1,000 hours 1 watt @ 70°C
(2%
∆TR)
Rotational Life........200 cycles (2%
∆TR)
Physical Characteristics
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
3057L
Common Dimensions
31.75
(1.25)
25.4
(1.000)
3057Y
3.18
(.125 )
1.47
±
.56
(.058
±
.022)
ADJ. SLOT
2.92
±
.38 DIA.
(.115
±
.015)
.64
WIDE
X
(.025)
.79
DEEP
X
(.031)
1
2
3
7.62
(.300)
17.78
(.700)
6.35
(.250)
2.36
DIA.
(.093)
MTG. HOLES (2)
4.83
(.190)
2.54
(.100)
.71
±
.03 DIA. TYP.
(.028
±
.001)
6.10
TYP.
(.240)
152.4
LEADS
MIN. LENGTH
(6.000)
8.00
±
.38
(.315
±
.015)
6.10
TYP.
(.240)
12.70
±
.79
(.500
±
.031)
2.54
(.100)
2.67
(.105 )
3.43
±
.38
(.135
±
.015)
RED
YELLOW
CCW
2
WIPER
3057J
1
CLOCKWISE
3
3.80
(.150)
GREEN
CW
1
2
3
TOLERANCES: ± 0.25 (.010) EXCEPT WHERE NOTED
DIMENSIONS ARE:
METRIC
(INCHES)
7.62
(.300)
17.78
(.700)
6.35
(.250)
.71
±
.03 DIA. TYP.
(.028
±
.001)
Standard Resistance Table
Resistance
(Ohms)
10
20
50
100
200
500
1,000
2,000
5,000
10,000
20,000
50,000
Resistance
Code
100
200
500
101
201
501
102
202
502
103
203
503
Nominal
Resolution
(Percent)
2.40
1.90
1.40
1.00
0.86
0.89
0.72
0.58
0.43
0.34
0.31
0.24
2.54
(.100)
3057P
.71
±
.03
(.028
±
.001)
DIA. TYP.
2
1
17.78
(.700)
22.86
(.900)
3
6.60
(.260)
12.70
±
.79
(.500
±
.031)
Popular values listed in boldface. Special
resistances available.
How To Order
3057 L - 1 - 103 M
Model
Style
Standard or Modified
Product Indicator
-1 = Standard Product
Resistance Code
Optional Suffix Letter
M = Panel Mount
(Factory Installed)
SHADED AREAS TYPICALLY NOT STOCKED BY
DISTRIBUTORS AND NOT RECOMMENDED FOR NEW
DESIGNS.
*”FLUORINERT” IS A REGISTERED TRADEMARK OF 3M CO.
10
Specifications are subject to change without notice.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
