Relays handle resistive and inductive loads

An OEM Automatic product story
Edited by the Engineeringtalk editorial team Mar 23, 2005

The Delcon SLO24CRA4 can switch 4A with any load voltage up to 250V DC.

Electromechanical relays are well suited to most interface applications, but when switching DC loads they do have limitations.

With a resistive load the contact has to be derated for voltages greater than 24V, and severe derating is required for highly inductive loads.

For example a typical electromechanical relay contact might be able to switch 10A at 24V DC but this must be derated to 0.4A at 220V DC.

The same relay contact with an inductive load (100ms time constant) is only able to switch 0.6A at 24V DC.

The Delcon SLO24CRA4 can switch 4A with any load voltage up to 250V DC.

If the load is inductive (50ms time constant) then 4A can still be achieved if the load voltage is limited to 24V.

All relays feature Delcon's patented "pulse transformer technology" and have built in suppression components which makes them ideal for industrial applications.

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