Panasonic is part of a large worldwide groupselling relays and associated switching products under different brand names in different territories.The conditions of use in some territories may differ from those customary in Europe. In particular there are often major differences in regard to national and international specifications, such as UL, CSA, VDE, SEV, EVE, SEMKO, etc. Thus, when considering contact loads as stated in this catalogue (e.g. 10 A, 30 VDC for the SP relay) its hould be understood that these values are not necessarily an absolute maximum but tested ratings. Mostly the stated value has been tested for a certain life expectancy as stated by the manufacturer or the respective test house. Thus, under different conditions, the stated “maximum” may, in practice, be safely exceeded.
Figure 22, Figure Figure show the
Conductor width, inch
Figure 23
Conductor length, inch
Figure 26
standards, necessary conform to
the regulations.015
51 150 0.050
301 500 2. (Taken from the JIS C5010
standards.54 .635 .039 .020 .) Coating the
surface the conductor with insulating
resin such solder resist increases the
flash over voltage, but because the pin
holes the solder resist, necessary to
consider the conductor destruction
voltage without the solder resist.
Conductor width, inch
Figure 24
E n
M axim and
AC Voltage Between
C onductors (V)
M inim onductor
Spacing (mm inch)
0 0.00508 /V
Conductor width inch
Figure 27
30 ds_x61_en_relay_technical_information_091112D
.) For example, too high
a rise tem perature causes degradation
of the characteristic and color changes of
the laminate.059 .098 . general, the allowable
current the conductor determined so
that the rise tem perature less than
10°C.27 . fact, it
is necessary add ample safety factor
when determining the spacing between
conductors. This destruction
voltage not the destruction voltage of
the board; the flash over voltage
(insulation breakdown voltage the
space between circuits.
Figure shows the relationship
between the conductor width and the
destruction current.
relationship between the current and the
conductor width for each rise in
tem perature for different copper foils.381 .
(The narrower the conductor width and
0.Applications Relays Electronic Circuits
6 ta
This data has been derived from samples
of this com pany's products.025
151 300 1. Use this data
as reference when designing PC
boards.) However, when the product is
covered the electrical products control
law, standards other safety
the thinner the copper foil, the larger the
tem perature rise.100
500 more
Calculated at
0. necessary design the
conductor width from this allowable
conductor current.079 .118
Conductor width, inch
Figure 22
Copper foil thick
Conductor width, inch
Figure 25
• s
Figure shows the relationship between
the spacing between conductors and the
destruction voltage.
• th
The allowable current for the conductor
was determined from the safety aspect
and the effect the perform ance the
conductor due the rise saturation
tem perature when current flowing. is
also necessary give consideration to
preventing abnormal currents from
exceeding the destruction current the
conductor. Table shows example a
design for the spacing between
conductors.008
