Shelly
Shelly Pro 3EM Switch Add-on
Shelly Pro 3EM Switch Add-on
Low stock
A galvanically isolated switch made to extend the functionality of the Shelly Pro 3EM. It allows you to control electrical devices with more flexibility and better manage your energy use.
Key features
- Dry contacts
- DIN-rail mountable
Couldn't load pickup availability
Technical details
Technical details
Device identification
Device name: Shelly Pro 3EM Switch Add-on
Short description
Shelly Pro 3EM Switch Add-on is a galvanically isolated switch that extends the capabilities of the Shelly Pro 3EM series, enabling control of contactors or other electrical appliances. Designed for both residential and industrial applications, it ensures reliable and safe operation in various environments.
Main applications
- Residential
- MDU (Multi Dwelling Units – apartments, condominiums, hotels, etc.)
- Light commercial (small office buildings, retail stores, restaurants, gas stations, etc.)
- Industrial (factories, power plants, water treatment, refineries, etc.)
- Agricultural (farms, barns, silos, etc.)
- Government/municipal facilities
- University/college campuses
Device electrical interfaces
Inputs: 1 load circuit input I
Outputs: 1 load circuit output O
Add-on interface: Shelly proprietary serial interface
⚠CAUTION! High voltage on the add-on interface when the Device is powered!
Safety features
Internal temperature sensing and reporting
Supported load types
- Resistive (incandescent bulbs, small heating devices)
- Capacitive (LED drivers, capacitor banks, electronic equipment)
- Inductive (contactors, transformers, fans, refrigerators)
User interface
Outputs:
• Power LED: Red light indicates power supply is connected.
• Output LED: Red light indicates the output relay contact is closed.
Specifications
Specifications
Physical
Size (HxWxD): 94×19×69 ±0.5 mm / 3.70×0.75×2.71 ±0.02 in
Weight: 20 ±1 g / 0.70 ±0.05 oz
Mounting: DIN rail, attached to a Shelly Pro 3EM
Screw terminals torque: 0.4 Nm (4.43 lbf·in)
Conductor size: 0.5–2.5 mm² (20–14 AWG, solid, stranded, and bootlace lugs)
Strip length: 6–7 mm (0.24–0.28 in)
Shell material: Plastic
Color: White
Environmental
Ambient temperature: −20 °C to 40 °C (−5 °F to 105 °F)
Humidity: 30–70% RH
Max altitude: 2000 m (6562 ft)
Electrical
Power supply voltage AC: N/A
Power supply voltage DC: 3.3 V and 12 V (from Shelly Pro 3EM device)
Power consumption: < 1 W
Sensors & Meters
Internal temperature sensor: Yes
Output ratings
Max switching voltage AC: 240 V~
Max switching voltage DC: 30 V⎓
Max switching current AC: 2 A
Max switching current DC: 2 A
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