---
title: Shelly i4 Gen3 Smart Four-Channel Inputs Controller
date: 2025-10-13T05:35:31Z
modified: 2026-05-22T07:02:19Z
permalink: "https://tech.co.za/product/shelly-i4-gen3-smart-four-channel-inputs-controller/"
type: product
status: publish
excerpt: "Multi-click – Up to 16 possible actions\\n 	\\nNew processor – ESP-Shelly-C38F chip with an increased memory of 8 MB\\n 	\\nImproved durability of terminals\\n 	\\nSupports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates\\n 	\\nNo HUB required! Easy control through Shelly Smart Control app, various home automation protocols, and platforms\\n 	\\nSupports KNXnet / IP communication"
wpid: 554669
product_brand:
  - Shelly
product_type:
  - simple
product_visibility:
  - featured
product_cat:
  - Smart Home
featured_image: "https://tech.co.za/wp-content/uploads/2025/10/SHELLY-I4-GEN3a.png"
---

### Diagrams

![](https://shellysa.co.za/wp-content/uploads/2025/08/shelly-i4-gen3_wiring_0.png)

![](https://shellysa.co.za/wp-content/uploads/2025/08/shelly-i4-gen3_wiring_02.png)

| **Terminals** | **Wires** |  |  |
| --- | --- | --- | --- |
| **SW1**, **SW2, SW3, SW4** | Switch/button input terminals | **L** | Live wire (110-240 V~) |
| **L** | Live terminal (110-240 V~) | **N** | Neutral wire |
| **N** | Neutral terminal |  |  |

### Specifications



| **Physical** |  |
| --- | --- |
| Size (HxWxD): | 37x42x16 / 1.46×1.65×0.63 |
| Weight: | 19 g / 0.67 oz |
| Screw terminals max torque: | 0.4 Nm / 3.5 lbin |
| 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: | Wall box |
| Shell material: | Plastic |
| Shell color: | Orange |
| Terminal Color | Black |
| **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: | 110 – 240 V~ 50/60 Hz |
| Power consumption: | < 1 W |
| **Sensors, meters** |  |
| Internal-temperature sensor: | Yes |
| **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 with BLE |
| 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: | 8MB |
| **Firmware capabilities** |  |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | Yes |
| MQTT: | Yes |