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Shelly 3EM-63T Gen3
Shelly 3EM-63T Gen3

Shelly 3EM-63T Gen3

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Next generation 3-phase energy meter designed for mounting directly on the circuit breaker.

A compact energy meter with flat terminals designed to monitor either a
three-phase system or three independent single-phase circuits. It
seamlessly integrates into smart home systems or professional setups,
providing accurate, real-time data to optimize energy efficiency.

4-quadrant measurement
Multiple connection types: three phase or single phase installations
Non-contact current measurements through current transformers
Phase sequence error detection (option)
No load threshold
Optical pulse indication of energy usage
Real-time clock: stored data keeps correct timestamps even if the internet connection is interrupted.
Data logs: up to 7 days of data stored on the device for later retrieval
Accuracy Class B (IEC 62053-21)
Photovoltaic ready

Specifications:

Quantity

Value

Physical

Size (HxWxD):

  • 21x54x42 mm / 0.83x2.13x1.65 in (Shelly 3EM-63W Gen3, without the wires)

  • 31x54x42 mm / 1.22x2.13x1.65 in (Shelly 3EM-63T Gen3, without the wire)

Wires length:

260 mm (including the flat terminal)

Weight:

  • 58 g / 2.05 oz (Shelly 3EM-63W Gen3, including the wires)

  • 52 g / 1.83 oz (Shelly 3EM-63T Gen3, including the wire)

Conductor aperture:

Ø8 mm / Ø0.3 in

Mounting:

Above or under DIN-rail mounted circuit breakers

Shell material:

Plastic

Shell color:

White

Environmental

Ambient working temperature:

-20 °C to 40 °C / -5 °F to 105 °F

Humidity:

30 % to 70 % RH

Max. altitude:

2000 m / 6562 ft

Electrical

Power supply:

220-240 V~ 50/60 Hz (between LA and N)

Power consumption:

< 2 W

External protection:

63 A, tripping characteristic B or C,
6 kA interrupting rating,
Energy limiting class 3

Sensors, meters

Internal-temperature sensor:

Yes

Voltmeters (RMS for each phase):

220-240 V~ 50/60 Hz

Voltmeters accuracy:

better than ±1%

Ammeters (RMS via integrated CT for each phase):

0 - 63 A (130 A saturation)

Ammeters accuracy:

±1 % (2 - 63 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A)

Power and energy meters:

  • Active and apparent power

  • Active and apparent energy

  • Power factor

  • Fundamental active and fundamental reactive energy

No load threshold:

30 VA

Measurement data storage:

At least 7 days of 1 min data resolution

Data export:

  • CSV for PQ recorded values

  • JSON format export through RPC

Radio

Wi-Fi

Protocol:

802.11 b/g/n

RF band:

2401 - 2483 МHz

Max. RF power:

< 20 dBm

Range:

Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors
(Depends on local conditions)

Bluetooth

Protocol:

4.2

RF band:

2400 - 2483.5 MHz

Max. RF power:

< 4 dBm

Range:

Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors
(Depends on local conditions)

Microcontroller unit

CPU:

ESP-Shelly-C38F

Flash:

8 MB

Firmware capabilities

Schedules:

20

Webhooks (URL actions):

20 with 5 URLs per hook

Scripting:

Yes

MQTT:

Yes

Warranty and Support:

Warranty inquiries and troubleshooting via the Shelly-Support-Ticketsystem