Siemens SIRIUS 3RB2056 / 3RB2066 electronic overload relays with wide setting range protect size S6 / S10/S12 motors against overload, phase failure and asymmetry. Internally supplied; trip class 20E. All article numbers are listed below.
Technical data
| Series | 3RB2056 / 3RB2066 |
|---|---|
| Size | S6 / S10/S12 |
| Trip class | 20E |
| Protection | Overload, phase failure and asymmetry |
| Power supply | Internal (no external supply needed) |
| Auxiliary contacts | 1 NO + 1 NC |
| Reset | Manual and automatic |
| Functions | TEST and self-monitoring, switch position indicator |
Article numbers
| Size | Version | Motor rating (kW) | Setting range (A) | Max. gG fuse (A) | Screw | Spring-loaded |
|---|---|---|---|---|---|---|
| S6 | Mounting on contactors | 30–90 | 50–200 | 315 | 3RB2056-2FC2 | 3RB2056-2FF2 |
| S6 | Mounting on contactors | 30–90 | 50–200 | 315 | 3RB2056-2FW2 | 3RB2056-2FX2 |
| S10/S12 | Mounting on contactors | 30–132 | 55–250 | 400 | 3RB2066-2GC2 | 3RB2066-2GF2 |
| S10/S12 | Mounting on contactors | 90–355 | 160–630 | 800 | 3RB2066-2MC2 | 3RB2066-2MF2 |
Motor ratings are guide values for 4-pole standard motors at 50 Hz 400 V AC.
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 7, overload relays) and are for information only. Image is representative.
For price, stock and lead time, use the Request a Quote button or call +90 533 945 27 94. Sending the article number is enough.
Tags: 3RB2056 / 3RB2066, siemens electronic overload relay, 3RB, overload relay, motor protection, 3RB2056-2FC2, 3RB2056-2FF2, 3RB2056-2FW2, 3RB2056-2FX2, 3RB2066-2GC2, 3RB2066-2GF2, 3RB2066-2MC2, 3RB2066-2MF2