Chip Resistor Array
n Recommended Soldering Conditions
Recommendations and precautions are described below.
lRecommended soldering conditions for reflow
áReflow soldering should be a maximum of two times
áPlease contact us for additional information when
used in conditions other than those specified.
áPlease measure the temperature of the terminations and
For solder (Example : Sn/Pb)
Temperature
140 ¡C to 160 ¡C
Time
Preheating
Main heating
Peak
60 s to 120 s
30 s to 40 s
max. 10 s
Above 200 ¡C
235 ± 5 ¡C
study
every type of the printed circuit board for solderability,
before actual use.
For lead-free solder (Example : Sn/Ag/Cu)
Temperature
Time
Preheating
Main heating
Peak
150 ¡C to 180 ¡C
Above 230 ¡C
max. 260 ¡C
60 s to 120 s
30 s to 40 s
max. 10 s
lFlow soldering
áFlow soldering is not recommended because solder bridge may occur.
Safety Precautions
1. Component Placement
A Take measures against mechanical stress during and after mounting, so as not to damage the termination
and protective coating.
B Misplacement of components on the land pattern may cause solder bridge problem.
2. If transient load (heavy load in a short time) like pulse is expected to be applied, carry out evaluation and
confirmation test with the resistors actually mounted on the board before using in production.
When the load of more than rated power is applied under the load condition at steady state, it may impair
performance and/or reliability of resistor. Never exceed the rated power.
3. Chlorine type or other high-activity flux is not recommeded as the residue may affect performance or reliability
of resistors.
4. When soldering with soldering iron, never touch the body of the chip resistor with the tip of the soldering iron.
When using a soldering iron with a tip at high temperature, solder for as short a time as possible (three
seconds or less up to 350 ¡C).
5. Avoid physical shock to the resistor and nipping of the resistor with hard tool (pliers or tweezers) as
it may damage protective film or the body of resistor and may affect resistorÕs performance.
6. Do not use the product in high humidity atmospheres.
Design, Specifications are subject to change without notice. Ask factory for technical specifications before purchase and/ or use.
Whenever a doubt about safety arises from this product, please inform us immediately for technical consultation without fail.
