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The SGB5-80S is an intelligent miniature circuit breaker for residential and light-commercial
AC distribution, combining a 10 kA thermal-magnetic breaker (Icu, per EN/IEC 60898-1) with
a smart control module for local, remote or scheduled switching. It comes in 1P+N, 2P, 3P+N
and 4P versions, rated 6–80 A at 230 V AC or 400 V AC, with B/C tripping curves and an Ics of
7.5 kA.
2.Characteristic
Short Circuit Protection
High Breaking Capacity
Remote Control
Overload Protection
Flame Retardant Material
Timed Control
Short Arc
Multiple Wiring Options
| Item | Value |
|---|---|
| Model | SGB5-80S |
| Pole | 1P+N, 2P, 3P+N, 4P |
| Rated Working Voltage Ue (1P+N, 2P) | 230 V AC |
| Rated Working Voltage Ue (3P+N, 4P) | 400 V AC |
| Rated Frequency | 50 Hz / 60 Hz |
| Rated Current In | 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A |
| Rated Insulation Voltage Ui | 500 V |
| Rated Impulse Withstand Voltage Uimp | 6 kV |
| Tripping Characteristics | B / C |
| Tripping Type | Thermomagnetic |
| Rated Breaking Capacity Icn | 10 kA |
| Operational Breaking Capacity Ics | 7.5 kA |
| Electrical Life — Actual Average Value | ≥5000 operations |
| Electrical Life — Standard Specified Value | 4000 operations |
| Mechanical Life — Actual Average Value | ≥10000 operations |
| Mechanical Life — Standard Specified Value | 4000 operations |
| Over-voltage Level | III |
| Pollution Level | 3 |
| Protection Level | IP20 |
| Humidity and Heat Resistance | Category 2 |
| Relative Humidity | ≤95% |
| Vibration Resistance | According to IEC 60068-2-6 |
| Mechanical Impact Resistance Parameters | According to IEC 60068-2-27 |
| Wiring Capacity | 2.5–35 mm² |
| Wiring Torque | 3.0 N·m |
| Operating Ambient Temperature | −25 °C to +65 °C |
| Storage Ambient Temperature | −30 °C to +70 °C |
| Installation Method | DIN35 |
| Altitude | ≤2000 m |
| Standard | EN 60898-1, AS/NZS IEC 60898-1, GB/T 10963.1 |
| Temperature | −30 °C | −25 °C | −20 °C | −15 °C | −10 °C | −5 °C | 0 °C | 5 °C | 10 °C | 15 °C |
|---|---|---|---|---|---|---|---|---|---|---|
| Rated Operating Current Coefficient | 1.242 | 1.223 | 1.204 | 1.182 | 1.161 | 1.143 | 1.127 | 1.103 | 1.079 | 1.063 |
| Temperature | 20 °C | 30 °C | 35 °C | 40 °C | 45 °C | 50 °C | 55 °C | 60 °C | 65 °C | 70 °C |
|---|---|---|---|---|---|---|---|---|---|---|
| Rated Operating Current Coefficient | 1.047 | 1 | 0.984 | 0.968 | 0.952 | 0.922 | 0.904 | 0.891 | 0.872 | 0.844 |
| Item | 2000 m | 3000 m | 4000 m | 5000 m |
|---|---|---|---|---|
| Rated Working Current Coefficient | 1 | 0.96 | 0.91 | 0.86 |
| Rated Operating Voltage Coefficient | 1 | 1 | 1 | 1 |
| Rated Power Frequency Withstand Voltage Coefficient | 1 | 0.9 | 0.82 | 0.71 |
| Rated Impulse Withstand Voltage Coefficient | 1 | 0.9 | 0.82 | 0.71 |
| Rated Limit Short-circuit Breaking Capacity and Electrical Life Coefficient | 1 | 0.82 | 0.7 | 0.6 |
| Item | 1 | 2–3 | 4–5 | 6–8 | 9–10 |
|---|---|---|---|---|---|
| No. of MCB — In ≤ 25 A Coefficient | 1 | 0.96 | 0.9 | 0.8 | 0.7 |
| No. of MCB — 32 A ≤ In ≤ 63 A Coefficient | 1 | 0.92 | 0.8 | 0.7 | 0.6 |
| No. of MCB — 80 A ≤ In ≤ 125 A Coefficient | 1 | 0.9 | 0.8 | 0.7 | / |
① Smart Home Circuit Control
Remotely or periodically switch water heaters, rice cookers, coffee machines and other household appliances — cut standby power at night or on schedule, and control any circuit from the app without touching the distribution board.
② Rental Properties & Vacant Rooms
Landlords and property managers can switch power to vacant apartments or individual rooms on and off remotely, avoiding manual site visits while keeping the circuit protected against overload and short circuit at all times.
③ Household Distribution Boards
With Icn 10 kA and B/C curves, the SGB5-80S serves as the main or branch breaker in home distribution boards, protecting lighting, socket and kitchen circuits against overload and short-circuit faults.
④ Small Shops, Offices & Guesthouses
Timed control automates power-up and power-down of signage, HVAC and socket circuits in small commercial spaces, while the 80 A frame rating covers the higher loads of workshops and small business installations.
⑤Upgrade of Existing Installations
Standard 35 mm DIN-rail dimensions and 2.5–35 mm² wiring capacity allow direct replacement of ordinary MCBs — upgrading an existing board to intelligent control without changing the enclosure or busbar system.
FAQ
1. What is a WiFi smart circuit breaker and how does it work?
A WiFi smart circuit breaker combines the protection of a traditional miniature circuit breaker with WiFi connectivity, allowing users to switch circuits on/off and monitor power consumption via a smartphone app — locally or remotely — while still providing overload and short-circuit protection.
2. Can I control the WiFi circuit breaker remotely when I'm away from home?
Yes. Once the breaker is connected to your home WiFi (2.4 GHz) and paired with the app (e.g., Tuya/Smart Life), you can switch circuits on or off and check real-time status from anywhere, as long as your phone has internet access.
3. Does the WiFi smart breaker support scheduled timing and voice control?
Yes. It typically supports scheduled on/off tasks through the app, and is compatible with voice assistants such as Alexa and Google Assistant, so you can control connected circuits hands-free.
4. Can I monitor energy consumption with this smart circuit breaker?
Many models include built-in energy metering, letting you view real-time voltage, current, power and historical electricity usage in the app — useful for tracking high-consumption appliances and reducing energy costs.
5. Is a WiFi smart circuit breaker difficult to install? Does it replace a normal breaker?
It is designed as a direct replacement for a standard DIN-rail miniature circuit breaker, so installation follows the same wiring process. However, because it involves mains wiring, installation should be carried out by a qualified electrician.
