Overload relay 12.5...50 A for motor protection Size S3, CLASS 5E...30E Single installation Main circuit: push-through Auxiliary circuit: screw Manual-automatic RESET Electronic overload relay SIRIUS 3RB3 for current-dependent protection of consumers with normal and heavy starting against excessively high heating as a result of overload, phase asymmetry or phase failure. Thanks to large current setting ranges and different tripping characteristics, entire series of motors are covered with just a few types. With their low power loss, they are particularly energy efficient and contribute to less heating in the control cabinet. Worldwide approvals (e.g. IEC and UL/CSA) and applications in potentially explosive applications (ATEX) are a matter of course. The 3RB31 version offers extended functionality such as an integrated electrical remote reset, ground fault detection and much more. Available with various setting ranges for the overload release and with various tripping classes. They are available with screw or spring-loaded connections for a quick, maintenance-free and vibration-proof connection, as well as for individual installation. The accessories are suitable for all sizes S00 to S3. Simple, efficient, always up-to-date - the SIRIUS modular system. Electronic overload relay SIRIUS 3RB3 for current-dependent protection of consumers with normal and heavy starting against excessive heating as a result of overload, phase asymmetry or phase failure. Thanks to large current setting ranges and different tripping characteristics, entire series of motors are covered with just a few types. With their low power loss, they are particularly energy efficient and contribute to less heating in the control cabinet. Worldwide approvals (e.g. IEC and UL/CSA) and applications in potentially explosive areas (ATEX) are a matter of course. The 3RB31 version offers extended functions such as an integrated electrical remote reset, ground fault detection and much more. Available with various setting ranges for the overload release and with various release classes. They are available with screw or spring-loaded connections for a quick, maintenance-free and vibration-proof connection, as well as for individual installation. The accessories are suitable for all sizes S00 to S3. Simple, efficient, always up-to-date - the SIRIUS modular system.
| Property | Value |
| Number of auxiliary contacts as normally closed: | 1 |
| Number of auxiliary contacts as normally open: | 1 |
| Adjustable current range: | 12.5 to 50 A |
| Automatic reset function: | yes |
| Input reset function: | yes |
