Shanghai Fradwell Industrial Automation Co., Ltd.
| Delivery Time | 3-5Workdays |
| Contact configuration | 1 CO (SPDT) |
| Shipping Term | International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/Sea Freight / Air Freight / International Special Line |
| Width / mounting | 6.2 mm, 35 mm DIN rail snap-on |
| Coil voltage | 24 V AC/DC |
| Series | SIRIUS 3RQ3 |
| Freight Charge | For Industrial Equipment (E.G., PLC Modules, Inverters..), Shipping Cost Varies By Package Weight/Volume And Delivery Location. Contact Our Sales Team For A Customized Shipping Solution And Quot |
| Payment Terms | L/C,D/A,D/P,T/T |
| Thermal current | 6 A |
| Packaging Details | Original |
| Terminal type | Screw-type terminals |
| Model Number | 3RQ3018-1AB00 |
| Brand Name | Siemens |
| Place of Origin | Germany |
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Product Specification
| Delivery Time | 3-5Workdays | Contact configuration | 1 CO (SPDT) |
| Shipping Term | International Express（DHL/FEDEX/TNT/UPS/ARAMEX）/Sea Freight / Air Freight / International Special Line | Width / mounting | 6.2 mm, 35 mm DIN rail snap-on |
| Coil voltage | 24 V AC/DC | Series | SIRIUS 3RQ3 |
| Freight Charge | For Industrial Equipment (E.G., PLC Modules, Inverters..), Shipping Cost Varies By Package Weight/Volume And Delivery Location. Contact Our Sales Team For A Customized Shipping Solution And Quot | Payment Terms | L/C,D/A,D/P,T/T |
| Thermal current | 6 A | Packaging Details | Original |
| Terminal type | Screw-type terminals | Model Number | 3RQ3018-1AB00 |
| Brand Name | Siemens | Place of Origin | Germany |
| High Light | Siemens relay coupler 24V AC/DC ，Siemens screw terminal relay coupler ，Breaker contactor relay coupler 24V | ||
The Siemens SIRIUS 3RQ3 series 3RQ3018-1AB00 is an ultra-slim coupling relay (output coupler) with a housing only 6.2 mm wide. It couples and electrically isolates signals between PLC or controller outputs and field loads, protecting the controller's output stage while passing the signal through. It provides one change-over contact (1 CO) with a 6 A thermal current rating, so it drives solenoid valves, contactor coils and similar loads directly. Safe isolation between the control circuit and the auxiliary circuit is rated up to 300 V — no separate isolating amplifier is needed.
This model uses screw-type terminals with a tightening torque of 0.5-0.6 N·m and accepts conductors from 0.25 to 2.5 mm² (AWG 20-14) — the right choice where tools are available and wiring must be firmly fixed yet remain serviceable. The 24 V AC/DC coil operates over a wide 0.8-1.25 × Us range to tolerate supply fluctuation, and a green LED on the front panel gives an immediate read on operating and fault status.
The 93 × 6.2 × 72.5 mm housing snaps onto any standard 35 mm DIN rail in any mounting position and requires 0 mm spacing for side-by-side mounting, so dozens can be packed onto a single rail and cabinet space is used efficiently. Mechanical service life reaches 10,000,000 operating cycles, making this relay well suited to high-frequency switching circuits.
| Parameter | Specification |
|---|---|
| Brand | Siemens |
| Series | SIRIUS 3RQ3 |
| Product designation | Coupling relay with relay output (not plug-in), output coupling link |
| Product type designation | 3RQ3 |
| Control supply voltage | 24 V AC (50/60 Hz) / 24 V DC |
| Operating range | 0.8-1.25 × Us (AC and DC) |
| Voltage type, main circuit | AC/DC |
| Drop-out voltage | 10 % of input voltage |
| Switch-on delay | 12 ms (AC) / 12 ms (DC), maximum |
| Closing delay | 12 ms (AC) / 6 ms (DC) |
| Off-delay time | 14 ms, maximum |
| Opening delay | 14 ms (AC) / 13 ms (DC) |
| Switching behavior | Monostable |
| Relay operating mechanism | Poled |
| Type of switching contact | Changeover contact (CO) |
| Number of CO contacts | 1 |
| Contact material | AgSnO2 |
| Thermal current | 6 A |
| Output ampacity, AC-15 @ 250 V | 3 A |
| Output ampacity, DC-13 @ 24 V | 1 A |
| Output ampacity, DC-13 @ 125 V | 0.2 A |
| Output ampacity, DC-13 @ 250 V | 0.1 A |
| Output short-circuit proof | No |
| Short-circuit protection fuse | gG 4 A |
| Contact reliability | One incorrect operation per 100 million (17 V / 5 mA) |
| Insulation voltage (overvoltage cat. III, pollution degree 3) | 300 V |
| Surge voltage resistance | 4 kV |
| Max. permissible voltage, control ↔ auxiliary circuit | 300 V (safe isolation) |
| Mechanical service life | 10,000,000 operating cycles (typical) |
| Electrical endurance | 100,000 cycles (AC-15 / 230 V, typical) |
| Max. operating frequency | 72,000 1/h |
| Status display | Green LED |
| Type of electrical connection | Screw-type terminals |
| Tightening torque | 0.5-0.6 N·m |
| Connectable conductor cross-section, solid | 0.25-2.5 mm² |
| Connectable conductor cross-section, finely stranded with end processing | 0.25-1.5 mm² |
| AWG conductors | 20-14 |
| Max. wire length | 500 m (AC) / 1,000 m (DC) |
| Plug-in socket | No (not plug-in) |
| Protection class | IP20 |
| Mounting | Snap-on mounting, any mounting position |
| Dimensions H × W × D | 93 × 6.2 × 72.5 mm |
| Required spacing, side-by-side mounting | 0 mm |
| Ambient temperature, operation | −25 … +60 °C |
| Storage / transport temperature | −40 … +85 °C |
| Relative humidity, operation | 10 … 95 % |
| Max. installation altitude | 2,000 m |
| Shock resistance | 15 g / 11 ms half-sine (IEC 60068-2-27) |
| Vibration resistance | 6-150 Hz: 2 g (IEC 60068-2-6) |
| EMC emitted interference | Ambience A, industrial sector (IEC 60947-1) |
| EMC immunity | Severity 3 (IEC 60947-1) |
| Burst immunity (IEC 61000-4-4) | 2 kV |
| Surge immunity, conductor-earth / conductor-conductor | 2 kV / 1 kV |
| Field-based coupling (IEC 61000-4-3) | 10 V/m |
| Electrostatic discharge (IEC 61000-4-2) | 6 kV contact / 8 kV air discharge |
| Reference code (IEC 81346-2:2009) | K |
| Application | Details |
|---|---|
| Signal coupling between PLC outputs and actuators | Core use case; isolates the controller from the field circuit |
| Signal amplification and level conversion | Converts a control signal into a 6 A contact output to drive small relays or contactor coils |
| Electrical isolation of control signals | 300 V safe isolation, no separate isolating amplifier required |
| Machine building / special-purpose machinery control cabinets | 6.2 mm slim design saves DIN rail space |
| Process industry and conveyor systems | Signal relaying for pumps, fans and valves |
| Marine and offshore | DNV type approval held |
| Building automation / HVAC control panels | Signal coupling for fan coil units and valve actuators |
Company Details
Business Type:
Manufacturer,Exporter
Ecer Certification：
Verified Supplier
About Us: Beyond Components, We Deliver Certainty Shanghai Fradwell Industrial Automation Co., Ltd — Your Trusted Partner in Industrial Automation. With over two decades of industry expertise, we have evolved from a traditional supplier into a one-stop integrated solutions provider f... About Us: Beyond Components, We Deliver Certainty Shanghai Fradwell Industrial Automation Co., Ltd — Your Trusted Partner in Industrial Automation. With over two decades of industry expertise, we have evolved from a traditional supplier into a one-stop integrated solutions provider f...
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