SKI06073

SKI06073-DS Rev.1.2

SANKEN ELECTRIC CO.,LTD.

5

Jan. 24, 2014

OPERATING PRECAUTIONS

In the case that you use Sanken products or design your products by using Sanken products, the reliability largely

depends on the degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation

range is set by derating the load from each rated value or surge voltage or noise is considered for derating in order to

assure or improve the reliability. In general, derating factors include electric stresses such as electric voltage, electric

current, electric power etc., environmental stresses such as ambient temperature, humidity etc. and thermal stress caused

due to self-heating of semiconductor products. For these stresses, instantaneous values, maximum values and minimum

values must be taken into consideration. In addition, it should be noted that since power devices or IC’s including power

devices have large self-heating value, the degree of derating of junction temperature affects the reliability significantly.

Because reliability can be affected adversely by improper storage environments and handling methods, please

observe the following cautions.

Cautions for Storage

 Ensure that storage conditions comply with the standard temperature (5 to 35°C) and the standard relative humidity

(around 40 to 75%); avoid storage locations that experience extreme changes in temperature or humidity.

 Avoid locations where dust or harmful gases are present and avoid direct sunlight.

 Reinspect for rust on leads and solderability of the products that have been stored for a long time.

Remarks About Using Silicone Grease with a Heatsink

 When silicone grease is used in mounting the products on a heatsink, it shall be applied evenly and thinly. If more

silicone grease than required is applied, it may produce excess stress.

 Volatile-type silicone greases may crack after long periods of time, resulting in reduced heat radiation effect.

Silicone greases with low consistency (hard grease) may cause cracks in the mold resin when screwing the

products to a heatsink.

Our recommended silicone greases for heat radiation purposes, which will not cause any adverse effect on the

product life, are indicated below:

Type

Suppliers

G746

Shin-Etsu Chemical Co., Ltd.

YG6260 Momentive Performance Materials Inc.

SC102

Dow Corning Toray Co., Ltd.

Cautions for Testing and Handling

When tests are carried out during inspection testing and other standard test periods, protect the products from power

surges from the testing device, shorts between the product pins, and wrong connections. Ensure all test parameters are

within the ratings specified by Sanken for the products.

Soldering

When soldering the products, please be sure to minimize the working time, within the following limits:

・Reflow

Preheat ; 180 °C / 90 ± 30 s

Solder heating ; 250 °C / 10 ± 1s (260 °C peak, 2 times)

・Soldering iron ; 380 ± 10 °C / 3.5 ± 0.5s (1 time)

Electrostatic Discharge

 When handling the products, the operator must be grounded. Grounded wrist straps worn should have at least 1MΩ

of resistance from the operator to ground to prevent shock hazard, and it should be placed near the operator.

 Workbenches where the products are handled should be grounded and be provided with conductive table and floor

mats.

 When using measuring equipment such as a curve tracer, the equipment should be grounded.

 When soldering the products, the head of soldering irons or the solder bath must be grounded in order to prevent

leak voltages generated by them from being applied to the products.

 The products should always be stored and transported in Sanken shipping containers or conductive containers, or

be wrapped in aluminum foil.