Siemens 3RU2146-4LB1
MPN3RU2146-4LB1
Active
Overload relay 70...90 A Thermal For motor protection Size S3, Class 10 Stand-alone installation Main circuit: Screw Auxiliary circuit: Screw Manual-Automatic-Reset
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | thermal overload relay |
| Frame size (overload relay) | S3 |
| Combinable contactor sizes | S3 |
| Reference code (IEC 81346-2) | F |
Protection & Trip
| Parameter | Value |
|---|---|
| Overload current setting range | 70 ... 90 A |
| Trip class | CLASS 10 |
| Overload release type | thermal |
Electrical (main circuit)
| Parameter | Value |
|---|---|
| Rated operational current | 90 A |
| Poles (main circuit) | 3 |
| Rated operating frequency | 50 ... 60 Hz |
| Rated insulation voltage (AC, pollution degree 3) | 1 000 V |
| Rated value (AC-3e), max. | 1 000 V |
| Rated surge withstand voltage | 8 kV |
| Main current circuit | screw-type terminals |
| Power loss at rated current (hot) | 21 W |
| Per pole | 7 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 gG: 6 A, quick: 10 A |
| Switching current at 24 V | 2 A |
| Switching current at 60 V | 0.3 A |
| Switching current at 110 V | 0.22 A |
| Switching current at 120 V | 3 A |
| Switching current at 125 V | 0.22 A |
| Switching current at 220 V | 0.11 A |
| Switching current at 230 V | 2 A |
| Switching current at 400 V | 1 A |
Connection & Mounting
| Parameter | Value |
|---|---|
| Mounting / fastening method | stand-alone installation |
| Mounting position | any |
| Main-circuit connector arrangement | Top and bottom |
| Auxiliary/control circuit connection type | screw-type terminals |
| Removable aux./control terminal | No |
| Conductor cross-section: solid | 2x (2.5 ... 16 mm²) |
| Conductor cross-section: solid or stranded | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor cross-section: finely stranded with ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor range (AWG), main contacts | 2x (10 ... 1/0), 1x (10 ... 2/0) |
| Conductor range (AWG), auxiliary contacts | 2x (20 ... 16), 2x (18 ... 14) |
Environmental
| Parameter | Value |
|---|---|
| Operating temperature | -40 ... +70 °C |
| Storage temperature | -55 ... +80 °C |
| Transport temperature | -55 ... +80 °C |
| Relative humidity, operating | 10 ... 95 % |
| Max. installation altitude | 2 000 m |
Mechanical
| Parameter | Value |
|---|---|
| Width | 70 mm |
| Height | 120 mm |
| Depth | 140 mm |
MPN
3RU2146-4LB1