Siemens SIRIUS 3RU1126-1DB0 thermal overload relay, CLASS 10, S0 frame, screw-type terminals for main and auxiliary circuits, IP20 front, ATEX certified.
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | thermal overload relay |
| Frame size (overload relay) | S0 |
| Combinable contactor sizes | S0 |
| Parameter | Value |
|---|---|
| Overload current setting range | 2.2 ... 3.2 A |
| Trip class | CLASS 10 |
| 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) | 5.7 W |
| Per pole | 1.9 W |
| 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, quick: 10 A |
| Switching current at 24 V | 1 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 |
| Parameter | Value |
|---|---|
| Mounting / fastening method | Contactor mounting |
| Mounting position | with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back |
| Auxiliary/control circuit connection type | screw-type terminals |
| Conductor cross-section: solid | 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 (16 ... 12), 2x (14 ... 8) |
| Conductor range (AWG), auxiliary contacts | 2x (20 ... 16), 2x (18 ... 14) |
| Parameter | Value |
|---|---|
| Relative humidity, operating | 100 % |
| Max. installation altitude | 2 000 m |
| Shock resistance | 8g / 10 ms |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 97 mm |
| Depth | 96 mm |
| Parameter | Value |
|---|---|
| Type Of Protection | DMT 98 ATEX G 001 |
The relay is housed in the S0 frame size (45 mm wide, 97 mm high, 96 mm deep) and is rated for ambient temperatures from -20 to +70 °C during operation, with storage from -55 to +80 °C.
Trip class CLASS 10 coordinates with contactors and breakers for normal motor starts. The auxiliary contact ratings cover a wide control-voltage range: 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, 1 A at 24 V, 0.22 A at 110/125 V, and 0.11 A at 220 V. The relay carries ATEX approval DMT 98 ATEX G 001.
Buyers need to know if they can still source the part or must switch to the successor.
Knowing the exact successor part number prevents design rework and sourcing errors.
Engineers and technicians need to confirm mechanical and electrical compatibility before substitution.
Sourcing buyers need active distributor stock or alternatives to fill a BOM line quickly.
Budgeting and cost comparison with the successor affects procurement decisions.
Field technicians and engineers need adjustment instructions to match motor full-load current.
No related articles