The FX9 Intelligent Circuit Breaker represents a new generation of circuit protection with advanced remote control capabilities, electrical parameter acquisition, remote communication, and comprehensive protection functions. With rated voltages of AC230V (single-phase) and AC400V (three-phase), and rated currents up to 63A, this product series is primarily designed for protection and control of main switches, lighting, sockets, air-conditioners, water heaters, and industrial equipment. The product features a compact 18mm width design for 1P configuration, high-torque terminals for reliable connections, and multiple communication options including 4G, WiFi, Ethernet, and RS485. Comprehensive protection functions include short circuit, overload, leakage, over-voltage, under-voltage, and over-temperature protection with configurable thresholds. The intelligent monitoring system collects real-time electrical parameters and uploads fault data for smart energy management and preventive maintenance.
FX9 Intelligent Miniature Circuit Breaker
Key Advantages
- Compact Design: Product size is small, 1P width size 18mm, and traditional small circuit breaker 1:1 replacement, suitable for width-constrained scenarios
- High Torque Design: The FX9 torque is equivalent to two times the national standard required torque, making cable connections more solid and reliable
- Dual-locking Clamp Structure: Greatly improves installation and maintenance efficiency with enhanced terminal connections
- Dual Protection: Mechanically and electronically protected against overload faults with quick-closing device for enhanced safety and product life
- Low Voltage Protection: Guarantees accurate protection at low voltages (below 3V) ensuring 100% absolute safety
- Remote Control: Remote closing and splitting, splitting lock and unlock functionality for complete control from anywhere
- Comprehensive Protection: Short circuit, overload, over-temperature, over-voltage, under-voltage, over-under-voltage self-recovery, leakage protection
- Parameter Collection: Voltage, current, power, electrical energy, frequency, power factor, residual current, temperature monitoring
- Life Statistics: Switching times with load, without load, and fault count for predictive maintenance
- Multiple Communication: 4G, Ethernet, WiFi, RS485 communication options with one gateway accommodating multiple sub-devices
- High Performance: Breaking capacity 6kA/10kA, electrical life 10,000 cycles, mechanical life 20,000 cycles
- Fault Data Upload: Provides basis for reasonable load distribution and smart energy management
Basic Specifications
| Parameter | Specification | Details |
|---|---|---|
| Product Name | FX9 Intelligent Miniature Circuit Breaker | Next-generation smart breaker |
| Rated Insulation Voltage | AC 500V | – |
| Rated Impulse Withstand Voltage | 4kV | Pollution degree 3 |
| Rated Operating Voltage | AC 230V / AC 400V | Single-phase / Three-phase |
| Rated Current Range | 6A – 63A | Multiple ratings available |
| Current Ratings | 6, 10, 16, 20, 25, 32, 40, 50, 63A | Wide range selection |
| Tripping Characteristics | B, C, D Curves | B: 3~5In; C: 5~10In; D: 10~20In |
| Pole Configuration | 1P, 2P, 3P, 4P | 18mm width for 1P |
| Breaking Capacity | 6kA / 10kA | High breaking performance |
| Current Limiting Class | 3 | – |
| Category | A | – |
| Electrical Life | 10,000 cycles | O-C cycles |
| Mechanical Life | 20,000 cycles | Auto-reclosing |
| Thermal Release Calibration Temp | 30°C | – |
| Weight | 200g per pole | – |
Breaking Capacity & Endurance
| Parameter | Value | Notes |
|---|---|---|
| Breaking Capacity (Icn) | 6kA, 10kA | – |
| Service Breaking Capacity (Ics) | 6kA, 7.5kA | For 10kA version |
| Current Limiting Class | 3 | – |
| Category | A | – |
| Electrical Life | 10,000 cycles | O-C operation |
| Mechanical Life | 20,000 cycles | Auto-reclosing |
Communication & Power Supply
| Parameter | Specification | Details |
|---|---|---|
| Communication Protocol | RS485 Modbus-RTU | – |
| Communication Rate | 9600 bps | – |
| Communication Options | 4G, Ethernet, WiFi, RS485 | Multiple methods selectable |
| Communication Modes | Local, Remote | Local: read only; Remote: full control |
| Power Requirements | DC 15V | – |
| Gateway Capacity | Multiple sub-devices | One gateway for multiple devices |
Measuring Accuracy
| Parameter | Accuracy Level | Range |
|---|---|---|
| Voltage | 0.2 level | – |
| Current (Single-phase) | 1 level | 0.05In-Imax |
| Current (Three-phase) | 0.5 level | 0.05In-Imax |
| Power (Single-phase) | 1 level | – |
| Power (Three-phase) | 0.5 level | – |
| Active Energy (Single-phase) | 1 level | – |
| Active Energy (Three-phase) | 0.5 level | – |
| Temperature Detection | ±1°C | – |
Protection Thresholds
| Protection Type | Threshold Value | Recovery Value | Notes |
|---|---|---|---|
| Over-Voltage Protection | 275V | 253V | Threshold can be set |
| Under-Voltage Protection | 162V | 195V | Threshold can be set |
| Voltage Recovery Time | – | 30 seconds | Over/under-voltage |
| Over-Temperature Alarm | 70°C | – | Alarm range start |
| Over-Temperature Protection | 90°C (default) | – | Tripping + alarm or alarm only |
| Over-Temperature Threshold Range | 70°C to set threshold | – | Configurable |
Wiring Capacity & Installation
| Parameter | Value | Comparison |
|---|---|---|
| Screw Size | M6.5 | – |
| Rated Torque | 3.5N.m | – |
| Limiting Torque | 5.0N.m | – |
| National Standard Torque | 2.0N.m | FX9 is 1.75x higher |
| Copper Wire (Hardwire) | 1-25mm² | – |
| Flexible or Hoop Terminals | 1-16mm² | – |
| Mounting Method | 35mm DIN Rail | Standard rail |
| Installation Style | Upper infeed | – |
Operating Environment
Ambient Temperature
-25°C ~ +70°C
Storage Temperature
-40°C ~ +85°C
Humidity Resistance
Category 2
95% RH at 55°C
Compliance Standard
GB/T 10963.1
Comprehensive Protection Functions
⚡ Short Circuit
Instant trip protection
🔥 Overload
Thermal & electronic
🌡️ Over-Temperature
70-90°C threshold
⬆️ Over-Voltage
275V protection
⬇️ Under-Voltage
162V protection
🔄 Auto Recovery
Voltage self-recovery
💧 Leakage
Residual current
Application Scenarios
💡 Lighting Systems
Commercial and residential lighting protection
🔌 Socket Outlets
General purpose socket protection
❄️ Air Conditioning
HVAC system protection
🚿 Water Heaters
Electric water heating protection
🏭 Industrial Equipment
Industrial machinery protection
🏢 Main Switch
Primary distribution panel protection
Quick Specifications
- Voltage: 230V / 400V
- Current: 6A – 63A
- Breaking Capacity: 6kA / 10kA
- Communication: 4G, WiFi, Ethernet, RS485
- Protection: 7 types
- Life: 10k electrical, 20k mechanical
Key Features
Communication Options
Contact Information
Hangzhou Weltrus New Energy Technology Co., Ltd.
Block D, Ocean International Center
333 Yuanjian Street, Hangzhou
Zhejiang, China
Tel/WhatsApp: +86 13735502672
Email: [email protected]
Contact UsCONTACT
+86-13735502672
Adhering to the development philosophy of market-oriented, customer-centric, and supply based, we continuously promote technological innovation and product upgrades, and provide global users with higher quality, efficient, and environmentally friendly clean energy solutions.