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.
4 No.5 >0.5 >0. Stateofothercontacts
Contact No.020inch;eachoftheform“b”contacts(No.
Evenifoneofthecontactswelds,theothercontacts
operateindependentlyandthecontact gapsare
maintainedatgreaterthan0.5 >0.5 >0.020inch.5 >0.5mm.
>0.5mm.5 >0.5 |
6 >0.5mm.5 |
2 >0.
''''-'-■^.3 No.1 No.Theothercontacts, because
thecoil isnotenergized, returntotheirnormal return
state; eachofform“a”contacts(No.5
5 >0.5 >0.5 >0.
Eachofthefourform“a”contacts(No.020inch.5 >0.5 >0.
Theadjacent No.5 >0.Contact No. 20-19 12-11 8-7 16-15 13-14 5-6 9-10 17-18
T h
t e
f .
ds 61407 sf4d: 180413D 583
Safety
.5 >0.5mm. 1contact iswelded)
Example the No. contact welds..5 >0. and7)
maintainsagapofgreaterthan0.020inch
C e
Contact No.5 >0.5mm
.
Non-energized Energized(whenno. 0.
3 >0. No.020inch.7 No.
Energized Non-energized(whenno.5
8 >0. contact welds.5
Welded
terminal
No.8
Terminal No..5 >0.
Example 2:
If external connections are made series.5 >0.5
4 >0.5 >0. 8
1 >0.
Ifthecontactschangestateowingtoloading/breakingitisnecessarytocheck
theactual loading.5 >0.
E d
W d
a .5 >0.5 No. and7)
maintainsacontact gapofgreaterthan0.5 >0.5 >0.
Energized-
Non-energized-
Weld
- -
-0-—T5
Contactgap
min0.
4 Form Form type
I d
W r
g . and
8) returntoaclosedstate.SF4D
THE OPERATION RELAYS (when contacts are welded)
SF relays work maintain normal operating state even when the contact welding occur overloading short-circuit
currents.5
7 >0.5 >0.2 No.020inch
¡:contact closed
Emptycells:
eitherclosedoropen
For Cautions for Use, see Relay Technical Information (page 610).5 >0. 2contact iswelded)
Example: the No.5 >0.5 >0. 2contact maintainsagapofgreater
than0.5mm.6 No. easy make weld detection circuits and safety circuits the design ensure safety even contacts weld.5
*Contact gapsareshownattheinitial state.5: contact gapiskept at
min
