PRECAUTIONS
Precautions on the use of Spark Gaps
Stages
1. Circuit Design
Precautions
SVerification
of operating environment, electrical rating and per-
formance
1. A malfunction in medical equipment, spacecraft, nuclear re-
actors, etc. may cause serious harm to human life or have
severe social ramifications. As such, any Spark Gaps to be
used in such equipment may require higher safety and/or reli-
ability considerations and should be clearly differentiated from
components used in general purpose applications.
SVerification
of Rated voltage (DC rated voltage)
Technical considerations
1/2
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SURGE ABSORBERS
SOperating
Environment precautions
1. Capacitors should not be used in the following environments:
(1)Environmental conditions to avoid
a. exposure to water or salt water.
b. exposure to moisture or condensation.
c. exposure to corrosive gases (such as hydrogen sulfide, sulfu-
rous acid, chlorine, and ammonia)
2. PCB Design
1. When Spark Gaps are mounted onto a PC board, hole dimen-
sions on the board should match the lead pitch of the compo-
nent, if not it will cause breakage of the terminals or cracking
of terminal roots covered with resin as excess stress travels
through the terminal legs. As a result, humidity resistance
performance would be lost and may lead to a reduction in
insulation resistance and cause a withstand voltage failure.
3. Considerations for automatic
insertion
SAdjustment
Automatic Insertion machines (leaded components)
1. When inserting Spark Gaps in a PC board by auto-insertion
machines the impact load imposed on the capacitors should
be minimized to prevent the leads from chucking or clinching.
457
YUDEN [ TAIYO YUDEN ]
