Brochure/Catalogue
for EMR
for SSR
Combination of relay
and relay socket, insulation
requirements and thermal
characteristics
Even if the socket or relay itself already meets (or surpasses) the insulation
requirements, there may still be reduced clearance and creepage distances
(and thus reduced insulation rated voltage) for the combination of the relay and
socket.
Restrictions – such as a reduced voltage range or reduced pollution degree –
should be expected for the relay/socket combination. This is especially important
for miniature multi-pole relays in combination with sockets, which have minimal
gaps between the contact circuits.
In addition to the insulation properties, the thermal properties of the combination
are highly signicant (see item entitled ”Derating curve”). The relay sockets from
different manufacturers cannot be compared directly, which is why the technical
specications are only guaranteed for approved combinations. Possible risks of
re or reduced dielectric strength may result when non-approved combinations
are in use.
Note: We only conrm the properties for the approved combinations of
Weidmüller relays and Weidmüller sockets as specied in the catalogue and data
sheets.
x x
EMR = Electromechanical relay
SSR = Solid-state relay
Glossary: Relay modules and Solid-state relays
W
Technical appendix/Glossary
W.172737920000