When can I use DC SSRs in series
DC relays using bipolar transistors,
usually in the lower voltage and current
range, should not be paralleled as they
do not share current. If a higher voltage
is required it is advisable to use the
MOSFET based DC relays which have a
wider voltage range. Crydom offers
such a series with voltage ranges of up
The situation with DC relays that use
MOSFET switching in the output is
rather different, here both series and
parallel connections are possible to
achieve the following goals.
For full details, please see attached file.