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Catalogue status: May 10, 2025
High DC voltages
Optimal relay solutions for loads above 24 V DC
Switching relays can switch off only relatively small DC voltages and currents because the zero crossing for extinguishing the arc is missing here. The maximum DC current value is also dependent on the switching voltage and on design conditions such as contact spacing and contact opening speed.
In the case of undamped inductive DC loads, the energy stored in the inductive load can ignite a standing arc that passes the current through the open contacts. This causes extremely high contact wear, resulting in premature failures. Such high loads can be switched reliably if relay modules and solid-state relays specially designed for this application are used. These have, for example, built-in blow-out magnets or large contact openings, which significantly minimizes contact wear. In the following you will find special relay solutions for switching high DC voltages and currents.

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