Siemens SIRIUS thermal overload relay, 3RU2126-1DB0, CLASS 10, S0 frame, contactor-mounted, 690 V rated, screw terminals.
| Parameter | Value |
|---|---|
| Product brand name | SIRIUS |
| Product designation | thermal overload relay |
| Frame size (overload relay) | S0 |
| Combinable contactor sizes | S0 |
| Reference code (IEC 81346-2) | F |
| Parameter | Value |
|---|---|
| Overload current setting range | 2.2 ... 3.2 A |
| Trip class | CLASS 10 |
| Overload release type | thermal |
| Parameter | Value |
|---|---|
| Rated operational current | 3.2 A |
| Poles (main circuit) | 3 |
| Rated operating frequency | 50 ... 60 Hz |
| Rated insulation voltage (AC, pollution degree 3) | 690 V |
| Rated value (AC-3e), max. | 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 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 |
| Parameter | Value |
|---|---|
| Mounting / fastening method | Contactor mounting |
| 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 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 (16 ... 12), 2x (14 ... 8) |
| Conductor range (AWG), auxiliary contacts | 2x (20 ... 16), 2x (18 ... 14) |
| 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 |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 85 mm |
| Depth | 85 mm |
It mounts directly on a contactor. It's the S0 frame size (45 mm wide, 85 mm deep), designed to snap directly onto a corresponding contactor or mount on a busbar. No separate base needed — that's panel-space and wiring time saved.
Mounting position: any — no derating for sideways or upside-down fit.
Listed peer MPNs are PLC I/O modules, not overload relays. They lack CLASS 10 protection.
The note 'Tripped' is a message that appears on the device when the overload relay has operated. It indicates a trip condition has occurred and the relay requires a manual or automatic reset before restart.
The relay measures 45 mm wide, 85 mm high, and 85 mm deep. It fits the S0 frame and mounts directly to a contactor.
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