Manuals+

Specifications

Physical Specifications

Property Value
Size (HxWxD) Shelly Pro 3EM-3CT63: 94×19×69 mm / 3.70×0.75×2.71 in
Shelly 3CT63 Dimensions 14×54×26 mm / 0.55×2.12×1.02 in
Weight Shelly Pro 3EM-3CT63: 62 g / 2.19 oz
Shelly 3CT63 Weight 32 g /1.12 oz
CT aperture Ø9 mm / Ø0.35 in
Wire diameter 6 mm / 10 AWG
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 (solid, stranded, and bootlace ferrules)
Shelly 3CT63 Conductor cross section 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 Mounting Freestanding on phase wires
Shell material Plastic

Environmental Specifications

Property Value
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 Specifications

Property Value
Power supply 100 - 260 V~ 50/60 Hz
Power consumption < 3 W
Shelly 3CT63 electrical strength 1000 V~, 60 sec

Sensors and Meters

Property Value
Internal-temperature sensor Yes
Voltmeters (RMS for each phase) 100 - 260 V
Voltmeters accuracy ±1 %
Ammeters (RMS via CT for each phase and the Neutral) 0 - 63 A
Compatible CT 3CT63
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

Measurement Capabilities

Property Value
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 Specifications

Property Value
Wi-Fi
RF band 2400 - 2495 MHz
Max. RF power < 20 dBm
Protocol 802.11 b/g/n
Range Up to 50 m / 164 ft outdoors, up to 30 m / 98 ft indoors (depending on local conditions)

Bluetooth Specifications

Property Value
Protocol 4.2
RF band 2400-2483.5 MHz
Max. RF power <4 dBm
Range Up to 30 m / 98 ft outdoors, up to 10 m / 33 ft indoors (depending on local conditions)

Microcontroller Unit

Property Value
CPU ESP32-D0WDQ6
Flash 16 MB

Firmware Capabilities

Property Value
Webhooks (URL actions) 20 with 5 URLs per hook
Wi-Fi range extender Yes
BLE Gateway Yes
Scripting Yes
MQTT Yes
Encryption Yes

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