SMD Economy Trimmers
Type 3142 Series
Literature No. 1773128
Issued: 08-05
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
www.tycoelectronics.com
passives.tycoelectronics.com
Key Features
■Stable Cermet Element
■0.15W Power Rating
■Packed in Standard 12mm
Tape
■Suited to Auto Placement
■Temperature Range
-25°C to +85°C
■Excellent Vacuum Pickup
on Rotor
■Height Profile of Just 2.4mm
from Board
Type 3142 Series
A range of small single turn trimmers
suited to reflow soldering and
attractively priced for volume
application. The 3142 is supplied on
12mm tape on 180mm diameter reels.
This product is long established,
having an excellent reputation for
long term stability. It is readily available
from our network of distributors.
Characteristics -
Electrical
Characteristics -
Mechanical
Rotation Torque: 2.0 - 20 mNm
Solder Strength: 300mNm (3 directions) minimum
Mechanical Rotation: 360° Continuous
Characteristics -
Environmental
Operating Temperature Range: -25°C to +85°C
Humidity Load Life: 350 hrs 40°C RH 90-95% ∆R ±5%
Load Life: 1000 hrs @ 70°C ∆R ±5%
Temperature Cycle: ∆R ±3% -25°C ~ +85°C
Rotational Life: 10 ±10% cycles
Resistance Range: 100R to 1M
Resistance Values: 1, 2 & 5 in each decade
Resistance Tolerance: ± 25%
Resistance Law: Linear
Temperature Coefficient of Resistance: ± 250ppm/°C
Operating Voltage: 50 V DC maximum
Wiper Current: 50mA maximum
Resolution: Infinite
Contact Resistance Variation: <5% of Nominal Value
Power Rating: 0.15 Watts @ 70°C
Electrical Rotation: 270° ±10°
End Resistance: 5% maximum
Insulation Resistance: 100M (250V DC) minimum
When the ambient temperature exceeds 70°C, reduce the rated power and
current in accordance with the derating curve shown
Derating Curve
0102030405060708085
Ambient Temperature (°C)
100
80
60
40
20
0
Rated Power (%)
SMD Economy Trimmers
Type 3142 Series
Literature No. 1773128
Issued: 08-05
Dimensions are shown for
reference purposes only.
Dimensions are in millimetres
unless otherwise specified.
Specifications subject to
change.
www.tycoelectronics.com
passives.tycoelectronics.com
Dimensions
Substrate Layout
Cleaning Conditions
After soldering, use cleaning solvents such as chlorosen or dyefreon.
Storage
To prevent damage to the electrode, be sure to observe the following cautions
for storage.
Store in 40°C maximum ambient temperature and 70°C maximum ambient RH.
For maximum possible shelf life do not disturb polythene sleeve until you are
ready to use potentiometers.
Store where there are no harmful gases containing sulphur or chlorine.
How to Order
3142 W 102 P
Common Part
W - Terminals 1&3
towards sprocket holes
Orientation
The first two digits are
significant figures of
resistance value and the
third denotes the number
of zeros following.
e.g. 100R: 101
1K: 102
10K: 103
100K: 104
1MO: 105
Resistance Value Tolerance
3130 - 3 Terminals P - 25 %
