Siemens SIRIUS 3RH2122-2HB40 coupling relay, size S00, 24 V DC coil, 2 NO instantaneous contacts, rated 10 A at 24 V / 230 V, screw and snap-on mounting on 35 mm DIN rail.
| Parameter | Value |
|---|---|
| Contactor frame size | S00 |
| Parameter | Value |
|---|---|
| Rated operational current, AC-12, max. | 10 A |
| Rated value @ 400 V | 3 A |
| Rated value @ 500 V | 2 A |
| Rated value @ 690 V | 1 A |
| Rated value @ 230 V | 10 A |
| Rated value @ 24 V | 10 A |
| Rated value @ 60 V | 4.7 A |
| Rated value @ 110 V | 3 A |
| Rated value @ 220 V | 1.2 A |
| Parameter | Value |
|---|---|
| Control supply voltage type | DC |
| Parameter | Value |
|---|---|
| Auxiliary contact reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Parameter | Value |
|---|---|
| Conductor cross-section, solid or stranded | 2x (0,5 ... 4 mm²) |
| Conductor cross-section, finely stranded w/ ferrule | 2x (0.5 ... 2.5 mm²) |
| Mounting method | screw and snap-on mounting onto 35 mm standard mounting rail |
| Parameter | Value |
|---|---|
| Durability (operating cycles, typ.) | 30 000 000 |
| Parameter | Value |
|---|---|
| Operating temperature range | -25 ... +60 °C |
| Storage temperature range | -55 ... +80 °C |
| Installation altitude, max. | 2 000 m |
| Parameter | Value |
|---|---|
| Width | 45 mm |
| Height | 70 mm |
| Depth | 73 mm |
| Parameter | Value |
|---|---|
| At AC | 10 000 1/h |
The Siemens 3RH2122-2HB40 is a SIRIUS coupling relay, size S00, designed for switching auxiliary circuits in control panels. It carries two instantaneous NO contacts rated 10 A at both 24 V and 230 V, making it suitable for interposing between a PLC output and a higher-current load or for signal multiplication in a safety circuit.
The DC switching frequency is limited by a 7–20 ms on/off pulse window.
It is a SIRIUS coupling relay (size S00) for switching auxiliary circuits — typically used to interpose between a PLC output and a higher-current load, multiply contact signals, or provide isolation in control panels.
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