●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.

●Please request for a specification sheet for detailed product data prior to the purchase.

●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.

9603FERVOL05E1001T0

Notes of Caution on Handling and Us-

age

1) The ferrite core is a sinter. Make sure to handle it carefully as

it has low tolerance for impact such as being knocked or dorpped,

which may cause it to break or chip. Using it without realizing that

it is broken will result in degradation of its properties and heat

release. In addition, chipped fragments may result in injury or

even get into the eye.

2) The ferrite core is a magnetic substance. When there is a

strong magnet nearby, the core will be quickly attracted to it, and

there is the possibility that the core will be destroyed by the im-

pact. There is also the danger that a finger or the like may be

crushed between the two.

3) The ground surface of the ferrite core has sharp edges be-

cause it is not beveled so as to prevent decreased performance.

In addition, there may be a minute amount of burr. Carelessly

touching it may lead to injury.

4) Do not apply force to the ferrite core beyond the prescribed

amount. Otherwise, the core may break or chip the core.

5) Do not allow the ferrite core and jigs or two cores to collide.

Failing to observe this may destroy the core(s).

6) When securing the ferrite core, do not apply stress beyond the

necessary amount. Failing to observe this may break or chip the

core, reducing its properties.

7) Do not expose the ferrite core to rapid temperature extremes

(thermal shock). Failing to observe this may break or chip the

core.

8) When performing molding or such, the core may break or chip

on account of rapid changes in humidity and expansion differ-

ences between resins. Carefully evaluate the materials you

iutend using.

9) There are some ferrite cores that are heavy. Packing boxes

may fall over if stacked too high. Limit the height when stacking

them.

10) There are some ferrite cores that are heavy.

When

movingtheir packing boxes, take due care to prevent injury or

backache.

11) Since there is the possibility of damage by vibration, falling,

or other sources of physical shock when transporting ferrite cores

and transformers that use these cores, take care to provide ad-

equate packing to prevent such damage.

12) The ferrite core should be kept away from rapid temperature

changes, corrosive gases, dust, and humidity. Care should also

be taken to isolate it from vibration when transporting and storing

it.

13) Impact may cause the inductance of ferrite cores to change.

14) If the ferrite core is magnetized once by a strong magnet, it

may lose its prescribed properties.

15) If the ferrite core is used for a coil, wrap the wire with the

tension appropriate for the core's thickness and the tapering

shape. Applying tension beyond the prescribed amount when

wrapping the coil may break or chip the core.

16) When the ferrite core is directly used for a coil, the wire may

be damaged by the burr on the core's surface, resulting in a short

circuit. Select a core that has had its burr removed or has been

coated.

17) When the ferrite core is directly used for a coil, the wire may

be damaged by tension or friction, resulting in a short circuit. The

wire may also be damaged by kinks or the jigs and tools used

when adjusting the transformer. Take adequate care when per-

forming work.

18) When wrapping a coil or during assembly, adjust the equip-

ment so that the core is not struck hard and no excessive stress is

applied, and make sure to handle it as delicately as possible.

19) The ferrite core should not be placed in the mouth. Make

sure to keep it away from young children.

20) Use the ferrite core under normal temperatures and in nor-

mal surroundings.

21) If core fragments or other debris get in the ferrite core's

ground surface, inductance will lower and howling will result.

22) When cutting the ferrite core, take measures to prevent injury

such as providing a cover or protector so that debris and chips

will not fly in all directions. In addition, note the following informa-

tion to prevent the core from breaking or chipping.

1

Select a grindstone with the properties for the core's quali

ties.

2

Adjust cooling agents and their conditions (amount, tem

perature, and quality).

3

For shapes that require a large amount of grinding, do not

grind all at once. Instead, grind a little bit at a time.

4

Use an exhaust system to prevent the aspiration of dust

produced when cutting the ferrite core.

Ferrite Cores VOL.05

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