Standalone Wi-Fi Smart MCB
Applications
The standalone Wi-Fi smart MCB is used for single-circuit final distribution and remote management. It connects to Wi-Fi independently, with no external gateway required.
Product design and connectivity
Selection overview
- Item
- Product series
- Specifications
- IOTB2-LD standalone smart MCB
- Item
- Communication
- Specifications
- WiFi
- Item
- Rated voltage
- Specifications
- AC220/230V (2P/single-phase) / AC380/400V (4P/three-phase)
- Item
- Current specification
- Specifications
- 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A
- Item
- Installation method
- Specifications
- TH35 (35 mm) DIN rail
| Item | Specifications |
|---|---|
| Product series | IOTB2-LD standalone smart MCB |
| Communication | WiFi |
| Rated voltage | AC220/230V (2P/single-phase) / AC380/400V (4P/three-phase) |
| Current specification | 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A |
| Installation method | TH35 (35 mm) DIN rail |
Poles and specifications
- Poles
- 2P
- Model specifications
- IOTB2-[rated current]/2LD
- Trip curve
- C / D
- Rated current
- 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A
- Module width
- 3P
- Applicable circuit
- Single-phase lighting, socket, water-heater and small-equipment circuits
- Poles
- 4P
- Model specifications
- IOTB2-[rated current]/4LD
- Trip curve
- C / D
- Rated current
- 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A
- Module width
- 5P
- Applicable circuit
- Three-phase power, charging station, and commercial equipment circuits
| Poles | Model specifications | Trip curve | Rated current | Module width | Applicable circuit |
|---|---|---|---|---|---|
| 2P | IOTB2-[rated current]/2LD | C / D | 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A | 3P | Single-phase lighting, socket, water-heater and small-equipment circuits |
| 4P | IOTB2-[rated current]/4LD | C / D | 6A / 10A / 16A / 20A / 25A / 32A / 40A / 50A / 63A / 80A | 5P | Three-phase power, charging station, and commercial equipment circuits |
Functions
- Remote switching: the app or platform sends the command, and the device reports its open/closed state.
- Electrical data: voltage, current, power, electrical energy, leakage current and temperature.
- Protection alarms: overcurrent, residual current, over- and under-voltage, overtemperature and other faults trigger an alarm or a protective cut-off.
- Record keeping: retains energy-use, fault and operation records for later maintenance.
Operating environment and installation
- Item
- Ambient temperature
- Specification
- -25 °C to 45 °C
- Item
- Altitude
- Specification
- ≤ 2000m
- Item
- Environmental requirements
- Specification
- Locations free from explosion risk, conductive dust, gases or dust that corrode metal or damage insulation, and significant vibration or shock
- Item
- Relative humidity
- Specification
- Relative humidity of the air not exceeding 50% at +40 °C; higher relative humidity is permitted at lower temperatures
- Item
- Conductor cross-section
- Specification
- 1–35 mm²
- Item
- Installation method
- Specification
- TH35 (35 mm) DIN rail mounting
| Item | Specification |
|---|---|
| Ambient temperature | -25 °C to 45 °C |
| Altitude | ≤ 2000m |
| Environmental requirements | Locations free from explosion risk, conductive dust, gases or dust that corrode metal or damage insulation, and significant vibration or shock |
| Relative humidity | Relative humidity of the air not exceeding 50% at +40 °C; higher relative humidity is permitted at lower temperatures |
| Conductor cross-section | 1–35 mm² |
| Installation method | TH35 (35 mm) DIN rail mounting |
Technical parameters
- Item
- Residual-current protection
- Specification
- When line leakage reaches IΔn, the circuit breaker trips within 0.1 s for protection; the leakage-current alarm and trip threshold are configurable from 15 mA to 30 mA.
- Item
- Residual-current protection disable
- Specification
- If leakage current exceeds 30 mA at startup and urgent operation is required, residual-current protection can be disabled through the app or platform.
- Item
- Residual-current protection self-test
- Specification
- Supports a local residual-current test button and remote residual-current self-test, with alarm information uploaded to the platform.
- Item
- Short-circuit protection
- Specification
- On a short circuit, curve C trips at 5–10 × In and curve D at 10–20 × In, clearing the fault within 0.04 s.
- Item
- Undervoltage protection
- Specification
- When the incoming supply falls below 176 V (304 V three-phase), the breaker trips within 3 s; the local button allows emergency closing.
- Item
- Auto-reclose after undervoltage
- Specification
- Automatically closes when line voltage returns to 195 V (configurable).
- Item
- Overvoltage protection
- Specification
- When the incoming supply rises above 275 V (475 V three-phase), the breaker trips within 1 s.
- Item
- Auto-reclose after overvoltage
- Specification
- Automatically closes when line voltage returns to 253 V (configurable).
- Item
- Terminal overtemperature protection
- Specification
- Alarms above 85 °C and trips above 95 °C.
- Item
- Lightning surge protection
- Specification
- Not exceeding ±4kA
- Item
- Overcurrent trip
- Specification
- Trips when the line current exceeds 1.45 × rated current (adjustable).
- Item
- Overload pre-alarm
- Specification
- When the load exceeds 90% (adjustable) of 1.45 times the rated power, an early-warning message is uploaded.
- Item
- Overload trip
- Specification
- Trips when the load exceeds 1.45 × rated power (adjustable) and uploads the alarm to the platform.
- Item
- Chip overtemperature alarm
- Specification
- Monitors the chip temperature in real time and raises an alarm when it exceeds the chip overtemperature alarm threshold.
- Item
- Arc fault protection
- Specification
- When enabled, protective action or an alarm is triggered if the current harmonics on any phase exceed the set value twice in succession.
- Item
- Abnormal load protection
- Specification
- Once enabled, a protective alarm or trip is triggered when the detected power rise reaches the configured abnormal-load threshold.
- Item
- Padlock lockout provision
- Specification
- When the toggle switch is set to maintenance-lock mode, the indicator shows the status; until the lock is released, the device rejects remote and manual close commands.
- Item
- Phase-loss protection
- Specification
- Alarm indication
- Item
- Three-phase imbalance alarm
- Specification
- Alarm indication
- Item
- Instantaneous current breaking capacity
- Specification
- 6kA with residual-current protection; 10kA without residual-current protection
- Item
- Short-time delay thermal-magnetic protection
- Specification
- When an overload or overcurrent reaches 2.55In, the bimetal strip bends and actuates the trip mechanism to open and protect the circuit.
- Item
- Long-time delay thermal-magnetic protection
- Specification
- For In≤63 A, no trip within 1 hour at 1.13In and opening within 1 hour at 1.45In; for In>63 A, no trip within 2 hours at 1.13In and opening within 2 hours at 1.45In.
- Item
- High-precision measurement
- Specification
- High-accuracy measurement of electrical power, accuracy class 1.
- Item
- Closing and opening control
- Specification
- Supports local operating-lever control, local buttons and remote control from the mobile app.
- Item
- High-grade arc-extinguishing device
- Specification
- Uses a stable, reliable arc chute that extinguishes arcs effectively to prevent electrical fires.
- Item
- Enclosure flammability class
- Specification
- Made of high-specification flame-retardant PA66 + glass fibre, with a V0 flammability rating.
- Item
- Structure
- Specification
- The breaker body uses the C65 mechanism with fast contact closure, which reduces arcing and extends contact life.
- Item
- Mechanical endurance
- Specification
- ≥ 30000 operations
- Item
- Electrical endurance
- Specification
- ≥ 6000 operations
- Item
- Standby power consumption
- Specification
- ≤ 0.65W
- Item
- Degree of protection
- Specification
- IP20
- Item
- Electrician maintenance mode
- Specification
- In maintenance mode, closing can be inhibited by a local lockout; until the lockout is released, neither remote commands nor the handle can close the breaker, and remote lockout permission management is supported.
- Item
- State retention on power loss
- Specification
- If a power failure occurs during switching, the device can be switched again manually or remotely after power is restored.
- Item
- Certifications
- Specification
- CCC, CQC, CE, SRRC
| Item | Specification |
|---|---|
| Residual-current protection | When line leakage reaches IΔn, the circuit breaker trips within 0.1 s for protection; the leakage-current alarm and trip threshold are configurable from 15 mA to 30 mA. |
| Residual-current protection disable | If leakage current exceeds 30 mA at startup and urgent operation is required, residual-current protection can be disabled through the app or platform. |
| Residual-current protection self-test | Supports a local residual-current test button and remote residual-current self-test, with alarm information uploaded to the platform. |
| Short-circuit protection | On a short circuit, curve C trips at 5–10 × In and curve D at 10–20 × In, clearing the fault within 0.04 s. |
| Undervoltage protection | When the incoming supply falls below 176 V (304 V three-phase), the breaker trips within 3 s; the local button allows emergency closing. |
| Auto-reclose after undervoltage | Automatically closes when line voltage returns to 195 V (configurable). |
| Overvoltage protection | When the incoming supply rises above 275 V (475 V three-phase), the breaker trips within 1 s. |
| Auto-reclose after overvoltage | Automatically closes when line voltage returns to 253 V (configurable). |
| Terminal overtemperature protection | Alarms above 85 °C and trips above 95 °C. |
| Lightning surge protection | Not exceeding ±4kA |
| Overcurrent trip | Trips when the line current exceeds 1.45 × rated current (adjustable). |
| Overload pre-alarm | When the load exceeds 90% (adjustable) of 1.45 times the rated power, an early-warning message is uploaded. |
| Overload trip | Trips when the load exceeds 1.45 × rated power (adjustable) and uploads the alarm to the platform. |
| Chip overtemperature alarm | Monitors the chip temperature in real time and raises an alarm when it exceeds the chip overtemperature alarm threshold. |
| Arc fault protection | When enabled, protective action or an alarm is triggered if the current harmonics on any phase exceed the set value twice in succession. |
| Abnormal load protection | Once enabled, a protective alarm or trip is triggered when the detected power rise reaches the configured abnormal-load threshold. |
| Padlock lockout provision | When the toggle switch is set to maintenance-lock mode, the indicator shows the status; until the lock is released, the device rejects remote and manual close commands. |
| Phase-loss protection | Alarm indication |
| Three-phase imbalance alarm | Alarm indication |
| Instantaneous current breaking capacity | 6kA with residual-current protection; 10kA without residual-current protection |
| Short-time delay thermal-magnetic protection | When an overload or overcurrent reaches 2.55In, the bimetal strip bends and actuates the trip mechanism to open and protect the circuit. |
| Long-time delay thermal-magnetic protection | For In≤63 A, no trip within 1 hour at 1.13In and opening within 1 hour at 1.45In; for In>63 A, no trip within 2 hours at 1.13In and opening within 2 hours at 1.45In. |
| High-precision measurement | High-accuracy measurement of electrical power, accuracy class 1. |
| Closing and opening control | Supports local operating-lever control, local buttons and remote control from the mobile app. |
| High-grade arc-extinguishing device | Uses a stable, reliable arc chute that extinguishes arcs effectively to prevent electrical fires. |
| Enclosure flammability class | Made of high-specification flame-retardant PA66 + glass fibre, with a V0 flammability rating. |
| Structure | The breaker body uses the C65 mechanism with fast contact closure, which reduces arcing and extends contact life. |
| Mechanical endurance | ≥ 30000 operations |
| Electrical endurance | ≥ 6000 operations |
| Standby power consumption | ≤ 0.65W |
| Degree of protection | IP20 |
| Electrician maintenance mode | In maintenance mode, closing can be inhibited by a local lockout; until the lockout is released, neither remote commands nor the handle can close the breaker, and remote lockout permission management is supported. |
| State retention on power loss | If a power failure occurs during switching, the device can be switched again manually or remotely after power is restored. |
| Certifications | CCC, CQC, CE, SRRC |
Operation and maintenance
- Item
- Local operation
- Specification
- Supports the handle, local button, remote / maintenance mode positions, open/close indication and residual-current test button.
- Item
- Post-fault unlocking
- Specification
- Locks out after a fault trip and can be unlocked remotely or manually once the fault has been cleared.
- Item
- Quick closing
- Specification
- The phase and neutral conductors close simultaneously; the phase closing interval is < 2ms, and the contacts are not prone to welding under overload.
- Item
- Records and traceability
- Specification
- Stores 12 months of electrical fault or test records and allows them to be queried.
- Item
- Offline operation
- Specification
- Supports local edge computing, so local safety monitoring and operation continue even when the network is down.
- Item
- Maintenance and replacement
- Specification
- Modules can be removed, replaced or rewired individually without affecting other circuits.
- Item
- Module connection
- Specification
- Once the wiring is tightened, the modules are connected to one another through the external connecting links (4PIN data transmission).
- Item
- Power limit
- Specification
- An alarm is triggered when active power exceeds the overload alarm setpoint.
- Item
- Real-time energy-use data
- Specification
- Voltage, current, energy use, leakage current, temperature and other data can be read in real time.
- Item
- Communication
- Specification
- WiFi
- Item
- Interface protocols
- Specification
- MQTT-JSON, TCP-MODBUS, and RTU-MODBUS, with API and SDK integration.
- Item
- Centralized platform management
- Specification
- Supports management via the app, mini program, PC client, H5 or a dedicated private network.
- Item
- Local edge computing
- Specification
- Does not depend on the cloud: local safety monitoring and operation continue even when the network is down.
- Item
- Internal mechanical interlock
- Specification
- Locks out after a trip and can be unlocked manually once the fault has been cleared.
- Item
- Maintenance and rewiring
- Specification
- The product can be removed on its own, so repairs, rewiring or replacement do not affect other circuits.
| Item | Specification |
|---|---|
| Local operation | Supports the handle, local button, remote / maintenance mode positions, open/close indication and residual-current test button. |
| Post-fault unlocking | Locks out after a fault trip and can be unlocked remotely or manually once the fault has been cleared. |
| Quick closing | The phase and neutral conductors close simultaneously; the phase closing interval is < 2ms, and the contacts are not prone to welding under overload. |
| Records and traceability | Stores 12 months of electrical fault or test records and allows them to be queried. |
| Offline operation | Supports local edge computing, so local safety monitoring and operation continue even when the network is down. |
| Maintenance and replacement | Modules can be removed, replaced or rewired individually without affecting other circuits. |
| Module connection | Once the wiring is tightened, the modules are connected to one another through the external connecting links (4PIN data transmission). |
| Power limit | An alarm is triggered when active power exceeds the overload alarm setpoint. |
| Real-time energy-use data | Voltage, current, energy use, leakage current, temperature and other data can be read in real time. |
| Communication | WiFi |
| Interface protocols | MQTT-JSON, TCP-MODBUS, and RTU-MODBUS, with API and SDK integration. |
| Centralized platform management | Supports management via the app, mini program, PC client, H5 or a dedicated private network. |
| Local edge computing | Does not depend on the cloud: local safety monitoring and operation continue even when the network is down. |
| Internal mechanical interlock | Locks out after a trip and can be unlocked manually once the fault has been cleared. |
| Maintenance and rewiring | The product can be removed on its own, so repairs, rewiring or replacement do not affect other circuits. |
