Shelly 1L Gen 3
Shelly 1L Gen3 is a compact, one-channel smart switch designed specifically for lighting control in installations that lack a neutral wire. Ideal for retrofits and older homes, it allows you to automate lights without rewiring.
With built-in Wi-Fi and Bluetooth, no hub is required. You can create schedules, automate scenes, or control your lighting through popular platforms like Alexa, Home Assistant, or the Shelly Smart Control app. It also acts as a Wi-Fi range extender and Bluetooth gateway for added convenience.
Key Features
No Neutral Wire Required – Designed for retrofit installations in older homes
Bypass Support – Works with the Shelly Bypass 1L/2L to control low-wattage loads
Bluetooth + Wi-Fi – Dual connectivity with no hub required
Powerful Integrations – Supports HTTP(S), MQTT(S), WebSockets, and scripting
Built-in Safety – Internal temperature sensor to protect against overheating
KNX Support – Communicates over KNXnet/IP for advanced building automation
Voice Assistant Compatible – Works with Alexa, Google Home, and more
Wi-Fi Repeater + Bluetooth Gateway – Expands your smart home network
Ideal For
Lighting control in homes with no neutral wire
Retrofitting older light switches
Smart home users wanting local control and flexibility
Home Assistant, Alexa, or MQTT-based smart homes
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Quantity |
Value |
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Physical |
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Size (HxWxD): |
37x42x16 ±0.5 mm / 1.46x1.65x0.63 ±0.02 in |
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Weight: |
24 g / 0.85 oz |
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Screw terminals max torque: |
0.4 Nm / 3.5 lbin |
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Conductor cross section: |
0.2 to 2.5 mm² / 24 to 14 AWG (solid, stranded, and bootlace ferrules) |
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Conductor stripped length: |
6 to 7 mm / 0.24 to 0.28 in |
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Mounting: |
In-wall |
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Shell material: |
Plastic |
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Shell color: |
Cyan |
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Terminal color: |
Black |
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Environmental |
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Ambient working temperature: |
-20 °C to 40 °C / -5 °F to 105 °F |
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Storage temperature: |
10°C to 40 °C |
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Humidity: |
30 % to 70 % RH |
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Max. altitude: |
2000 m / 6562 ft |
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Electrical |
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Power supply: |
220-240 V~ 50Hz (Shelly Bypass is required) |
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Shelly Bypass included |
Yes |
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Power consumption: |
< 1.2 W |
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Neutral not needed: |
Yes (Shelly Bypass is required for the load at O) |
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Min. load without neutral and without a Bypass: |
No (Shelly Bypass is required for the load at O), for all LED lights. |
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External protection: |
10 A, tripping characteristic B or C, |
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Output circuits ratings |
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Max. switching voltage: |
240 V~ 50 Hz |
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Max. switching power: |
200 W |
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Sensors, meters |
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Internal-temperature sensor: |
Yes |
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Radio |
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Wi-Fi |
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Protocol: |
802.11 b/g/n |
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RF band: |
2401 - 2495 МHz |
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Max. RF power: |
< 20 dBm |
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Range: |
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
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Bluetooth |
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Protocol: |
4.2 |
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RF band: |
2400 - 2483.5 MHz |
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Max. RF power: |
< 4 dBm |
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Range: |
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
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Microcontroller unit |
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CPU: |
ESP-Shelly-C38F |
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Clock frequency: |
160 Mhz |
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RAM: |
512 KB |
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Flash: |
8 MB |
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Firmware capabilities |
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Schedules: |
20 |
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Webhooks (URL actions): |
20 with 5 URLs per hook |
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Scripting: |
Yes |
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MQTT: |
Yes |
Important: All electrical installation work must be performed by a qualified and licensed electrician. Failure to comply may void product warranties and breach electrical safety laws.
