Shelly Pro 3EM 3CT63
Clamps on without rewiring · Electrician install
In stock · Ships in 1 to 2 business days
Choose options
Solar on the roof and no idea what is exported or imported?
CT clamps on each phase at the main switch let the Shelly Pro 3EM 3CT63 show import and export live, per phase, with history. The clearest view of what the solar is actually doing. Diagram: Shelly.
3-phase supply and the customer wants whole-house consumption?
3 CT clamps on the incoming phases and the Shelly Pro 3EM 3CT63 reports total and per-phase load, with voltage and power factor, straight to the app. No sub-meter needed. Diagram: Shelly.
Single-phase house, or 3 separate circuits to monitor?
On a single-phase board the 3 Shelly Pro 3EM 3CT63 clamps can sit on 3 different circuits: mains, hot water, pool. Each gets its own kWh reading in the app. Diagram: Shelly.
Key features
1 combined 63 A clamp: replaces 3 separate CTs, mounts straight onto the DIN rail.
Built for standard 3-phase boards: 63 A per phase covers most household and small-commercial services.
Solar and battery ready: 4-quadrant measurement reads import and export.
Modbus TCP support: integrates into building management systems, not just home automation.
60 days local data storage: history available without the cloud connected.
Works without the cloud: built-in web interface, local API and MQTT.
No built-in relay: metering only; pair with the Pro 3EM Switch Add-on for contactor control.
Works with
Home Assistant
Shelly Smart Control app
MQTT
Modbus TCP
About this product
The Shelly Pro 3EM 3CT63 takes a different approach to the higher-current Pro 3EM 400A: instead of 3 separate current transformers, it uses 1 combined 3-phase clamp rated to 63A, purpose-built to sit directly on a DIN rail next to the circuit breaker it's measuring. That makes it the tidier option for standard household or small-commercial 3-phase boards where 63A per phase covers the job.
It reports the same depth of data as its bigger sibling, per-phase voltage, current, active and apparent power, power factor, and 4-quadrant measurement for sites with solar or battery export, with Accuracy Class B performance and 60 days of onboard data storage. Connectivity runs over Wi-Fi, Ethernet and Bluetooth together, and Modbus-TCP is supported for integration into building management systems.
Like the 400A version, this unit has no built-in relay. If the job needs contactor control for load shedding or demand management, add a Shelly Pro 3EM Switch Add-on alongside it. It is a meter, not a switching device.
Model: SPEM-003CEBEU63
DIN rail install onto an existing 3-phase board: licensed electrician required; add the Pro 3EM Switch Add-on if contactor control is needed.
Tech specs
Physical
| Model | SPEM-003CEBEU63 |
| Dimensions | 94 × 19 × 69 mm (unit); 14 × 54 × 26 mm (3CT63 clamp) |
| Weight | 62 g |
Electrical
| Max load | 0 to 63 A per phase (combined 3CT63 clamp); W not stated |
| Power monitoring | Yes: no built-in relay |
| Operating temperature | −20 to 40 °C |
Connectivity
| Wi-Fi | 802.11 b/g/n |
| Bluetooth | 4.2 |
Compatibility
| Compatibility notes | No built-in relay: for contactor/load-shedding control, a separate Shelly Pro 3EM Switch Add-on is required. |
In the box
| What's in the box | 1 × Shelly Pro 3EM 3CT63 energy meter, 1 × combined 63 A 3-phase clamp |
Warranty
| Manufacturer warranty | 5 Years |
| Free Ohmly extension | +1 Year Free Ohmly Warranty |
