TECHNICAL GUIDE Ver.3
10
(5). Where the product is close to a heating component, and where an inflammable such
as a polyvinyl chloride wire is arranged close to the product.
(6). Where the resistor ids sealed and coated with resin, etc.
(7). Where water or a water-soluble detergent is used in cleaning free soldering and in
flux cleaning after soldering (Pay particular attention to water-soluble flux.)
8.2.Requests
(1). This technical guide is summarized technical contents of surface mount resistors
(produced and sold by our company) so that customer can use it properly.
(2). In traffic transportation equipment (trains, cars, traffic signal equipment, etc.),
medical equipment, aerospace equipment, electric heating appliances, combustion
and gas equipment, rotating equipment, disaster and crime preventive equipment,
etc. in cases where it is forecast that the failure of this product gives serious damage
to the human life and others, use fail-safe design and ensure safety by studying the
following items to.
∗ Ensure safety as the system by setting protective circuits and protective equipment.
∗ Ensure safety as the system by setting such rebundant circuits as do not cause
danger by a single failure.
(3). When it is happened that a doubt about safety of this product, let us know quickly
and you must examine technically.
(4). 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 your
own board. Moreover, if it is used under the specific condition, talk over it
beforehand.
(5). High-active flux as halogen-type (chlorine, bromine, etc) is not recommended as the
residue may affect performance or reliability of resistors. Confirm it before use.
(6). When soldering with soldering iron, never touch the body of the chip resistor with a
tip of the soldering iron. When using a soldering iron with a tip at high temperature,
solder for a time as short as possible.(up to 350 degree, less than 3 seconds)
(7). Avoid physical shock to the resistor and nipping of the resistor with hard tool (pliers
or tweezers) as it may damage protective coating or body of resistor and may affect
resistor’s performance.
(8). Avoid immersion of chip resistor in solvent for a long time. Use solvent after the
effect of immersion is confirmed.
8.3. Storage method
If the product is stored in the following environments and conditions, the performance
and solderability maybe badly affected. Avoid the storage in the following environment.
(1). Storage in places full of corrosive gasses such as sea breeze, Cl2, H2S, NH3, SO2,
and NO2.
(2). Storage in places exposed to direct sunlight.