PVZ3 Series Notice

c Notice (Operating and Storage Conditions)

c 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. If the trimmer potentiometer is used in DC and high

humidity conditions, please connect wiper (#2) for

plus and resistive element (#1 or #3) for minus.

c Notice (Soldering and Mounting)

Continued on the following page.

R50E.pdf

Jul.23,2012

14

• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.

2

1. Store in temperatures of -10 to +40°C and

relative humidity of 30-85%.

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 at right, 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 or electric/magnetic fields

(6) Direct sea breeze

(7) Other variations of the above

1. Soldering

(1) Soldering conditions

Refer to the temperature profile.

If the soldering conditions are not suitable,

e.g., excessive time and/or excessive

temperature, the trimmer potentiometer may

deviate from the specified characteristics.

Do not use flow soldering method (dipping).

If you use the flow soldering method, the

trimmer potentiometer may not function.

(2) 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.

(3) Apply the appropriate amount of solder paste.

The thickness of solder paste should be printed

from 100 micro m to 150 micro m and the dimension

of land pattern used should be Murata's standard

land pattern at reflow soldering. Insufficient

amounts of solder can lead to insufficient

soldering strength on PCB.

Excessive amounts of solder may cause bridging

between the terminals.

(4) 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. (PVZ Series only)

2. Mounting

(1) Do not apply excessive force, preferably 4.9N

max. (Ref. 500gf) when the trimmer potentiometer

is mounted to the PCB.

(2) Do not warp and/or bend the PC board to protect

trimmer potentiometer from breakage.

(3) In chip placers, the recommended size of the

cylindrical pick-up nozzle should be outer

dimension 2.5-2.8mm dia. and inner dimension

2mm dia.

3. Cleaning

(1) In case there is flux on the resistive element,

clean sufficiently with cleaning solvents and

completely remove all residual flux.

(2) Isopropyl alcohol and ethyl alcohol are

applicable solvents for cleaning. If you use any

other types of solvents, please evaluate

performance with your product.