Shelly Pro 3EM Switch Add-On
£30.79
A galvanically isolated dry-contact switch add-on that extends the Shelly Pro 3EM, letting it control contactors and other electrical devices for load management. It is DIN-rail mountable and attaches directly to the Pro 3EM, and is only compatible with that device.
- Dry contact output for driving external contactors
- Galvanically isolated for safe switching
- Only compatible with the Shelly Pro 3EM
- DIN-rail mountable, fitting directly alongside the Shelly Pro 3EM.
Buy the Shelly Pro 3EM Switch Add-On online in the UK from ShellyUK — genuine Shelly stock with fast UK delivery.
A galvanically isolated switch designed to expand the capabilities of your Shelly Pro 3EM device. This add-on allows you to easily control contactors and other electrical devices, giving you greater flexibility and control over your consumption.
- Dry contacts
- DIN-rail mountable
*Only compatible with Shelly Pro 3EM.
Dry contact output for driving external contactors
Galvanically isolated for safe switching
Only compatible with the Shelly Pro 3EM
DIN-rail mountable, fitting directly alongside the Shelly Pro 3EM.
Where you'd use it
Data-Driven Contactor Control
Pair the Switch Add-on with a Shelly Pro 3EM so a contactor can be switched automatically once real-time consumption data crosses a threshold you define.
Solar-Linked Load Switching
Use it to bring an immersion heater or EV charger online only when the Pro 3EM reports surplus solar export, rather than switching blindly on a timer.
Isolated Add-On Wiring
Because it's galvanically isolated and DIN-rail mounted alongside the Pro 3EM, it adds contactor control to the panel without introducing extra external wiring runs.
Specification
Physical & Build
- Power supply voltage
- DC 3.3 V and 12 V (from Shelly Pro 3EM device)
- Mounting DIN rail, attached to a Shelly Pro
- 3EM
- Conductor cross section
- 0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded and bootlace lugs)
- Conductor stripped length
- 6 to 7 mm / 0.24 to 0.28 in
- (H x W x L)
- 94 x 19 x 69 ±0.5 mm 3.70 x 0.75 x 2.71 ±0.02 in
Environmental
- Humidity
- 30% to 70% RH
Power & Electrical
- Power supply voltage
- AC N/A
- Power consumption < 1W
- Max switching voltage
- AC 240 V
- Max switching voltage
- DC 30V
Other
- Max switching current
- AC 2A
- Max switching current
- DC 2A
- Ambient temperature
- -20 to 40 °C / -5 to 105 °F
- Screw terminals max torque
- 0.4 Nm / 4.43 lbin
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