Product Description
Siemens 3RU2146-4HB0 Class 10 thermal overload relay for mounting on new Sirius 3RT204 size S3 contactors (3RT2045, 3RT2046, and 3RT2047) and is adjustable from 36 to 50 AMPS. This Siemens Sirius overload relay comes with 1 normally open and 1 normally closed set of contacts along with Class 10 tripping protection, which cuts power to the contactor in 10 seconds or less in an over current condition. Phase loss protection comes standard on the 3RU2146-4HB0 along with manual or automatic reset for complete motor protection.
| AMP Range | 36 to 50 AMPS |
| Auxiliary contacts | 1 N.O. / 1 N.C. |
| Reset | Manual or Automatic |
| Phase sensitive | Yes |
| Terminals | Screw |
Click here for a PDF file on this Siemens 3RU2146 thermal overload relay
The 3RU2146 thermal overload relays feature phase failure protection for the purpose of minimizing the heating of the load during single- phase operation as a result of phase failure.
It is possible to switch between manual resetting and automatic resetting by depressing and rotating the blue button (RESET button). When manual resetting is selected, a reset can be performed directly on the device by pressing the RESET button. Remote resetting can be implemented by using he mechanical and electrical RESET modules from the range of accessories. When the blue button is set to Automatic RESET, the relay will be reset automatically.
The 3RU2146 thermal overload relays are suitable for direct mounting on the 3RT203 contactors. They can also be mounted as single units if the appropriate adapters are used.
