Size (HxWxD)

Shelly Pro 3EM-3CT63: 94x19x69 mm / 3.70x0.75x2.71 in

Shelly 3CT63: 14x54x26 mm / 0.55x2.12x1.02 in

Weight

Shelly Pro 3EM-3CT63: 62 g / 2.19 oz

Shelly 3CT63: 32 g /1.12 oz

Screw terminals max torque

0.4 Nm / 3.5 lbin

Conductor cross section

Shelly Pro 3EM-3CT63: 0.5 to 2.5 mm² / 20 to 14 AWG

Shelly 3CT63: 0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules)

Conductor stripped length

6 to 7 mm / 0.24 to 0.28 in

Mounting

Shelly Pro 3EM-3CT63: DIN rail

Shelly 3CT63: Freestanding on phase wires

Conductor aperture Shelly 3CT63

Ø9 mm / Ø0.35 in

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

100-260 V~ 50/60 Hz

Power consumption

< 3 W

External protection

Tripping characteristic B or C,
16A max. rated current,
min. 6 kA interrupting rating,
energy limiting class 3

Shelly 3CT63 electrical strength

1000 V~, 60 sec

SENSORS, METERS

Internal-temperature sensor

Yes

Voltmeter (AC)

100 - 260 V

Voltmeter accuracy

±1 %

Ammeter (AC)

0 - 63 A

Ammeter accuracy

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

Compatible current transformers

3CT63

Power and energy meters

Active and apparent power

Active and apparent energy

Power factor

Fundamental active and fundamental reactive energy

Channel-to-channel calibration minimum load

500 W per channel

No load threshold

30 VA per channel

Measurement data storage

At least 60 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

2400 - 2495 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

ESP32-D0WDQ6

Flash

16   MB

FIRMWARE CAPABILITIES

Webhooks (URL actions)

20 with 5 URLs per hook

Scripting

Yes

MQTT

Yes

Scripting

Yes

Encryption

Yes