3RU7126-4BB0 - Siemens
MPN3RU7126-4BB0
Overload relay, 14…20 A, motor protection Size S0, Class 10 Contactor mounting Main circuit: screw terminal Auxiliary circuit: screw
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| 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 | 14 ... 20 A |
| Trip class | CLASS 10 |
| Overload release type | thermal |
| Parameter | Value |
|---|---|
| Rated operational current | 20 A |
| Poles (main circuit) | 3 |
| Rated operating frequency | 50 ... 60 Hz |
| 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) | 8.1 W |
| Per pole | 2.7 W |
| Parameter | Value |
|---|---|
| Switching current at 24 V | 3 A |
| Switching current at 230 V | 2 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 |
| Main-circuit connector arrangement | Top and bottom |
| Auxiliary/control circuit connection type | screw-type terminals |
| 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) |
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +55 °C |
| Transport temperature | -25 ... +70 °C |
| Relative humidity, operating | 0 ... 90 % |
| Max. installation altitude | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 97 mm |
| Depth | 96 mm |
MPN
3RU7126-4BB0