Siemens 3RB2133-4UB0
MPN3RB2133-4UB0
Overload relay 12.5...50 A For motor protection Size S2, Class 5...30 Contactor mounting Main circuit: Screw terminal Auxiliary circuit: Screw terminal Manual-Automatic-Reset Internal ground fault detection!!! Phased-out product!!! Successor is SIRIUS 3RB3 Preferred successor type is >>3RB3133-4UB0<<
StockContact for availability
Lead timeCall for availability wk
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | solid-state overload relay |
| Combinable contactor sizes | S2 |
| Reference code (IEC 81346-2) | F |
Protection & Trip
| Parameter | Value |
|---|---|
| Overload current setting range | 12.5 ... 50 A |
| Trip class | CLASS 5E, 10E, 20E and 30E adjustable |
Electrical (main circuit)
| Parameter | Value |
|---|---|
| Poles (main circuit) | 3 |
| Rated insulation voltage (AC, pollution degree 3) | 690 V |
| Rated surge withstand voltage | 6 kV |
| Main current circuit | screw-type terminals |
| Power loss at rated current (hot) | 0.05 W |
| Per pole | 0.02 W |
Auxiliary contacts
| Parameter | Value |
|---|---|
| Auxiliary contacts: NO | 1 |
| Auxiliary contacts: NC | 1 |
| Auxiliary contacts: CO (changeover) | 0 |
| Auxiliary switch short-circuit protection (required fuse) | fuse gL/gG: 6 A |
| Switching current at 24 V | 2 A |
| Switching current at 60 V | 0.55 A |
| Switching current at 110 V | 0.3 A |
| Switching current at 120 V | 4 A |
| Switching current at 125 V | 0.3 A |
| Switching current at 220 V | 0.11 A |
| Switching current at 230 V | 3 A |
Connection & Mounting
| Parameter | Value |
|---|---|
| Mounting / fastening method | Contactor mounting |
| Mounting position | any |
| Auxiliary/control circuit connection type | screw-type terminals |
| Removable aux./control terminal | Yes |
| Conductor cross-section: solid | 0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²) |
| Conductor cross-section: finely stranded with ferrule | 0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²) |
| Conductor range (AWG), main contacts | 2 x (max. 4), 1 x (18 ... 2) |
| Conductor range (AWG), auxiliary contacts | 2x (20 ... 14) |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature | -25 ... +60 °C |
| Storage temperature | -40 ... +80 °C |
| Transport temperature | -40 ... +80 °C |
| Relative humidity, operating | 100 % |
| Max. installation altitude | 2 000 m |
| Shock resistance | 15g / 11 ms |
Mechanical
| Parameter | Value |
|---|---|
| Width | 55 mm |
| Height | 92 mm |
| Depth | 109 mm |
Specifications
| Parameter | Value |
|---|---|
| Type Of Protection | PTB 06 ATEX 3001 Ex II (2) GD |
MPN
3RB2133-4UB0