PVG3 Series Notice
26
4
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications because there is no space for detailed specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
■ Notice (Operating and Storage Conditions)
1. Store in temperatures of -10 to +40 deg. C and
relative humidity of 30-85%RH.
2. Do not store in or near corrosive gases.
3. Use within six months after delivery.
4. Open the package just before using.
5. Do not store under direct sunlight.
6. If you use the trimmer potentiometer in an
environment other than listed below, please
consult with a Murata factory representative prior
to using.
The trimmer potentiometer should not be used under
the following environmental conditions:
(1) Corrosive gaseous atmosphere
(Ex. Chlorine gas, Hydrogen sulfide gas, Ammonia
gas, Sulfuric acid gas, Nitric oxide gas, etc.)
(2) In liquid
(Ex. Oil, Medical liquid, Organic solvent, etc.)
(3) Dusty / dirty atmosphere
(4) Direct sunlight
(5) Static voltage nor electric/magnetic fields
(6) Direct sea breeze
(7) Other variations of the above
■ Notice (Rating)
1. When using with partial load (rheostat), minimize
the power depending on the resistance value.
2. The maximum input voltage to a trimmer
potentiometer should not exceed (P.R)^1/2 or the
maximum operating voltage, whichever is smaller.
3. The maximum input current to a trimmer
potentiometer should not exceed (P/R)^1/2 or the
allowable wiper current, whichever is smaller.
■ Notice (Soldering and Mounting)
1. Soldering
(1) Standard soldering condition
(a) Reflow soldering :
Refer to the standard temperature profile.
(b) Soldering iron
Temperature of tip : 400 deg. C max.
Soldering time : 3 sec. max.
Diameter of tip : 2mm dia. max.
Wattage of iron : 30W max.
Before using other soldering conditions more
than those listed above, please consult with a
Murata factory representative prior to using.
If the soldering conditions are not
suitable, e.g., excessive time and/or excessive
temperature, the trimmer potentiometer may
deviate from the specified characteristics.
(2) Cannot be soldered using the flow soldering
method. If you use the flow soldering method,
the trimmer potentiometer may not function.
(3) The soldering iron should not come in contact
with the case of the trimmer potentiometer. If
such contact does occur, the trimmer
potentiometer may be damaged.
(4) Apply the appropriate amount of solder paste.
If the amount of solder paste applied to the
land is insufficient, the required adhesive
strength cannot be obtained. If an excessive
amount of solder paste is applied, solder
bridging or flux overflow to the resistive
element surface can occur.
2. Mounting
(1) Use our standard land dimension. Excessive land
area causes displacement due to the effect of the
surface tension of the solder. Insufficient
land area leads to insufficient soldering
strength of the chip.
(2) Do not apply excessive force (preferably 4.9N
(Ref.; 500gf) max.), when the trimmer
potentiometer is mounted to the PCB.
(3) Do not warp and/or bend PC board to prevent
trimmer potentiometer from breakage.
(4) In chip placers, the size of the cylindrical
pick-up nozzle should be outer dimension
2.5-3.0mm dia. and inner dimension
2.0-2.5mm dia..
3. Cleaning
(1) Isopropyl-alcohol and Ethyl-alcohol are
applicable solvents for cleaning. If you use any
other types of solvents, please consult with a
Murata factory representative prior to using.
(2) Less than 3 minutes of total cleaning time by
dipping, vapor and ultra-sonic method.
(3) In case of ultra-sonic cleaning method, cleaning
conditions should be as follows.
(a) Power: 600W (67lit.) max.
(b) Frequency: 28kHz
(c) Temperature: Ambient temperature
Due to ultra-sonic cleaning equipment's peculiar
self-resonance point and that cleaning
compatibility usually depends on the jig
Continued on the following page.
Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this PDF catalog to prevent smoking and/or burning, etc.
This catalog has only typical specifications. Therefore, you are requested to approve our product specifications or to transact the approval sheet for product specifications before ordering.
!Note R50E13.pdf 04.6.11