Siemens SIRIUS 3RB3133 / 3RB3143 electronic overload relays with wide setting range protect size S2 / S3 motors against overload, phase failure and asymmetry. Internally supplied; trip class 5E / 10E / 20E / 30E (adjustable). All article numbers are listed below.
Technical data
| Series | 3RB3133 / 3RB3143 |
|---|---|
| Size | S2 / S3 |
| Trip class | 5E / 10E / 20E / 30E (adjustable) |
| 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 |
|---|---|---|---|---|---|---|
| S2 | Mounting on contactors | 7.5–22 | 12.5–50 | 200 | 3RB3133-4UB0 | 3RB3133-4UD0 |
| S2 | Mounting on contactors | 11–37 | 20–80 | 250 | 3RB3133-4WB0 | 3RB3133-4WD0 |
| S2 | Mounting on contactors | 7.5–22 | 12.5–50 | 200 | 3RB3133-4UW1 | 3RB3133-4UX1 |
| S2 | Mounting on contactors | 11–37 | 20–80 | 250 | 3RB3133-4WW1 | 3RB3133-4WX1 |
| S3 | Mounting on contactors | 7.5–22 | 12.5–50 | 200 | 3RB3143-4UB0 | 3RB3143-4UD0 |
| S3 | Mounting on contactors | 18.5–55 | 32–115 | 315 | 3RB3143-4XB0 | 3RB3143-4XD0 |
| S3 | Mounting on contactors | 7.5–22 | 12.5–50 | 200 | 3RB3143-4UW1 | 3RB3143-4UX1 |
| S3 | Mounting on contactors | 18.5–55 | 32–115 | 315 | 3RB3143-4XW1 | 3RB3143-4XX1 |
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: 3RB3133 / 3RB3143, siemens electronic overload relay, 3RB, overload relay, motor protection, 3RB3133-4UB0, 3RB3133-4UD0, 3RB3133-4WB0, 3RB3133-4WD0, 3RB3133-4UW1, 3RB3133-4UX1, 3RB3133-4WW1, 3RB3133-4WX1, 3RB3143-4UB0, 3RB3143-4UD0, 3RB3143-4XB0, 3RB3143-4XD0, 3RB3143-4UW1, 3RB3143-4UX1, 3RB3143-4XW1, 3RB3143-4XX1