Overload relay 12.5...50 A for motor protection Size S3, CLASS 20E Contactor attachment Main circuit: screw Auxiliary circuit: spring-loaded terminal 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. Available with different setting ranges of the overload release and with different 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 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 lower 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. 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: | no |
