Shelly Pro 3EM 120A

Shelly Pro 3EM 120A

A meter for the distribution board

Shelly Pro 3EM is a DIN-rail energy meter designed to monitor three phases through current transformers. This listing is specifically for the standard 120 A model, rather than the 400 A version or newer Pro 3EM v2. It measures voltage, current, active and apparent power, energy and power factor, giving a more detailed picture than a single whole-site consumption figure.

Keep useful records close to the installation

The meter offers Ethernet and Wi-Fi networking, with Bluetooth available for setup. It stores at least 45 days of measurements at one-minute resolution and supports data export. That makes it useful for comparing operating periods, identifying sustained loads and reviewing changes after an automation has been introduced. Dashboard presentation and long-term retention depend on the connected software and its configuration.

Metering is separate from load control

Pro 3EM has no built-in load-switching relay. If a project also needs contactor control, that requires a separately assessed arrangement and compatible accessories. Installation belongs inside a suitable electrical enclosure and must be carried out by a qualified electrician. The installer must verify phase connections, current-transformer orientation, conductor fit and protective devices. A neutral current transformer is optional and is not included in the standard arrangement.

Key specifications

• Model: Shelly Pro 3EM, standard 120 A version
• Measurement: Three-phase energy monitoring
• Current range: 0–120 A per phase via CT
• Supply: 100–260 V AC, 50/60 Hz
• Data storage: At least 45 days at 1-minute resolution
• Mounting: DIN rail
• Dimensions: 94 × 19 × 69 mm
• Switching: No built-in load relay
• Warranty: Confirmed with quote; regional coverage subject to sourcing
• Protocol: Ethernet, Wi-Fi and Bluetooth

Frequently asked questions

Is 120 A a switching rating?

No. It describes the current measurement range through the compatible current transformers. The meter does not directly switch a 120 A load.

Can it provide energy history without a cloud account?

The device records measurements locally and provides export facilities. The chosen dashboard and any remote access can have separate service requirements.

Availability and enquiries

Out of stock at Smartify. Enquire to register interest or discuss an available alternative. Availability, price, regional version and warranty will be confirmed before any order; no restock date is promised.

Manufacturer product information