Siemens SIRIUS 3RQ4 is the new narrow coupling relay series with 6.2 mm width. With 1 changeover contact; versions with integrated or plug-in relay as input and output coupling links are available for 24, 115, 230 V AC/DC and 24, 110 V DC control voltages. Hard gold-plated contact versions suit low-level signal switching.
Technical data
| Width | 6.2 mm |
|---|---|
| Contact | 1 CO |
| Relay type | Integrated or plug-in relay |
| Control supply voltage | 24 / 115 / 230 V AC/DC; 24 / 110 V DC |
| Contact material | AgSnO2 or AgSnO2 hard gold-plated |
| Terminals | Screw or spring-loaded (push-in) |
Article numbers
| Coupling | Relay | Control voltage | Contact material | Feature | Screw | Spring-loaded (push-in) |
|---|---|---|---|---|---|---|
| Output | Integrated relay | AC/DC 24 V | AgSnO2 | – | 3RQ4018-1AB00 | 3RQ4018-2AB00 |
| Output | Integrated relay | AC/DC 24 V | AgSnO2 hard gold-plated | – | 3RQ4018-1AB01 | 3RQ4018-2AB01 |
| Output | Integrated relay | AC/DC 115 V | AgSnO2 | – | 3RQ4018-1AE00 | 3RQ4018-2AE00 |
| Output | Integrated relay | AC/DC 230 V | AgSnO2 | – | 3RQ4018-1AF00 | 3RQ4018-2AF00 |
| Output | Integrated relay | DC 24 V | AgSnO2 | – | – | 3RQ4018-2AM08-0AA0 |
| Output | Integrated relay | DC 24 V | AgSnO2 | PCB protective coating | – | 3RQ4018-2AM08-0AX0 |
| Output | Integrated relay | DC 110 V | AgSnO2 | – | – | 3RQ4018-2AN08-0AA0 |
| Output | Integrated relay | DC 110 V | AgSnO2 | PCB protective coating | – | 3RQ4018-2AN08-0AX0 |
| Input | Integrated relay | AC/DC 24 V | AgSnO2 | – | 3RQ4038-1AB00 | 3RQ4038-2AB00 |
| Input | Integrated relay | AC/DC 24 V | AgSnO2 hard gold-plated | – | 3RQ4038-1AB01 | 3RQ4038-2AB01 |
| Input | Integrated relay | AC/DC 115 V | AgSnO2 | – | 3RQ4038-1AE00 | 3RQ4038-2AE00 |
| Input | Integrated relay | AC/DC 115 V | AgSnO2 hard gold-plated | – | 3RQ4038-1AE01 | 3RQ4038-2AE01 |
| Input | Integrated relay | AC/DC 230 V | AgSnO2 | – | 3RQ4038-1AF00 | 3RQ4038-2AF00 |
| Input | Integrated relay | AC/DC 230 V | AgSnO2 hard gold-plated | – | 3RQ4038-1AF01 | 3RQ4038-2AF01 |
| Output | Plug-in relay | AC/DC 24 V | AgSnO2 | – | 3RQ4118-1AB00 | 3RQ4118-2AB00 |
| Output | Plug-in relay | AC/DC 24 V | AgSnO2 hard gold-plated | – | 3RQ4118-1AB01 | 3RQ4118-2AB01 |
| Output | Plug-in relay | AC/DC 24 V | AgSnO2 | Manual/Off/Automatic switch | 3RQ4128-1AB30 | 3RQ4128-2AB30 |
| Output | Plug-in relay | AC/DC 115 V | AgSnO2 | – | 3RQ4118-1AE00 | 3RQ4118-2AE00 |
| Output | Plug-in relay | AC/DC 115 V | AgSnO2 hard gold-plated | – | 3RQ4118-1AE01 | 3RQ4118-2AE01 |
| Output | Plug-in relay | AC/DC 230 V | AgSnO2 | – | 3RQ4118-1AF00 | 3RQ4118-2AF00 |
| Output | Plug-in relay | AC/DC 230 V | AgSnO2 hard gold-plated | – | 3RQ4118-1AF01 | 3RQ4118-2AF01 |
| Output | Plug-in relay | DC 24 V | AgSnO2 | – | 3RQ4118-1AM00 | 3RQ4118-2AM00 |
| Output | Plug-in relay | DC 24 V | AgSnO2 hard gold-plated | – | 3RQ4118-1AM01 | 3RQ4118-2AM01 |
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 5, contactor relays and relays) and are for information only. Image is representative.
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