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.
Applications Relays Electronic Circuits
APPLICATIONS RELAYS ELECTRONIC CIRCUITS
[1] RELAY DRIVE MEANS TRANSISTOR
1. Countermeasures for Surge
Breakdown Voltage Relay
Control Transistor
If rre rru ,
a lta d
in coil. lta e
b lta tra e
tra ill ill
le ly
n e
c irc tin e
fro f.
A ita tin e
c rre e
a tifie rre coil, d
th lta be
a tim r
s lta .
2.
Non-pulse signal Pulse signal (square wave)
(Good) Snap action)
ds_x61_en_relay_technical_information_091112D 633
TechnicalInfo. Snap Action
(C ris tic ith lta rise
a lta )
U lik ris tic lta is
im coil, is
th s
th lta tim o
to lta tim .
T lta is
a lta F
tim lta r
a tro use.
(Good) Collector connection
With this most common
connection, operation stable.
(Care) Emitter connection
When the circumstances
make the use this
connection unavoidable, if
the voltage not
completely impressed on
the relay, the transistor
does not conduct
completely and operation is
uncertain. Connection Method
If tra riv e
re ith lle r
c tio .
.
C tio lle y
to lta ill
be tim e
re is
tim e
tra r's lle itte r
d ill lta e
s ly
v lta .
Take care the “Area Safe Operation
(ASO)”
3.
(Care) Parallel connection
When the power consumed
by the complete circuit
becomes large, consideration
of the relay voltage is
necessary
