Electromechanical relays have problems to cut off DC voltages higher than 24 V. For example a normal 12 A relay is down rated to about 0,5 amps with 250 VDC. A proper solution to this problem has been Delcon´s Solid State Relay SLO 24CRA with 24 VDC input voltage and 0…250 VDC output by 1,8 A effective current.

Now Delcon is launching an extension to the present CRA series. New control voltages 48, 120 and 220 VDC give the designer more possibilities to use standard solutions in previously difficult applications.

When there is a need for higher currents, then the new relay series SLO …CRA4 is the right solution. These relays connect with as high as 4 A effective current up to 250 VDC. This is over 100 % more than the CRA series offers.

Even very small inductive loads, which appear for example in solenoid valves, can destroy control relays and cause considerable costs due to unexpected production downtime. Delcon has developed new control voltages for its current Solid State Relay series SLO …CRA. This product is excellent in controlling highly inductive loads, up to 100 ms time factor. The existing product range covers all control voltages from 5 to 220 VDC with 1,8 A current.

Delcon has developed a totally new, more powerful series, SLO …CRA4, which is intended for use in extremely difficult applications. These relays are able to cut-off inductive loads up to 50 ms with 4 A current and 24 V input voltage. The new CRA4 series covers different input voltages from 12 to 220 VDC the output being “floating” from 0 to 250 VDC.



Delcon relays have the full current capacity even with highly inductive loads. The graph shows the effect of a 100 ms load on breaking performance.