Chint NXBLE-40C6 residual current circuit breaker (RCCB)

The Chint NXBLE-40C6 residual current circuit breaker (RCCB) is a miniature leakage circuit breaker designed for residential and small commercial scenarios, featuring overload, short-circuit, and leakage protection functions. Below are its core characteristics and application instructions:  

 Ⅰ. Core Parameters and Functional Design  

- **Basic Parameters*Chint NXR series thermal overload relays price* 

  In the model NXBLE-40C6, "NXBLE" represents Chint's miniature RCCB series, "40" indicates a frame current of 40A, "C6" refers to the C-type tripping characteristic (instantaneous tripping range: 5–10 times the rated current). It has a rated current of 6A and a leakage action current of 10mA. Suitable for AC 50Hz circuits with a rated voltage of 230V, it has a breaking capacity of 4.5kA, effectively interrupting short-circuit currents.  

- **Structural Features*CHINT circuit breaker price*  

  Adopts a 1P+N double-inlet/double-outlet design, disconnecting the neutral wire (N) and live wire (L) simultaneously for superior safety compared to traditional single-pole circuit breakers. It has a compact size (only 18mm wide), supports TH35mm rail mounting, can be operated with one hand, and includes a built-in test button and closing lock function (requires pressing the blue reset button to close). The product surface is equipped with an anti-counterfeiting QR code, allowing users to scan and view inspection reports and certification information for authenticity verification.  

 Ⅱ. Performance and Safety Features  CHINT surge protector price*

- **Leakage Protection**:  

  The electronic leakage trip device responds rapidly (<30ms), instantly cutting off the circuit when the residual current reaches 10mA to effectively prevent electric shock and electrical fires. Test the leakage function monthly by pressing the test button; replace the device immediately if it fails to trip.  

- **Overload/Short-Circuit Protection**:  

  The C-type tripping curve is suitable for conventional loads such as lighting and sockets, tripping rapidly when the current exceeds 5–10 times the rated value to protect the circuit from overload damage. For example, the 6A specification can protect circuits with a total power not exceeding 1.3kW (230V×6A).  

- **Environmental Adaptability**:  

  Operates in a temperature range of -35°C to +70°C, suitable for high-temperature and humid environments (avoid direct water exposure), with an IP20 protection rating (prevents solid foreign objects from entering). The wire cross-sectional area must match the current specification (6A corresponds to 1.5mm² copper wire) to avoid terminal overheating.  

 Ⅲ. Application Scenarios and Typical Configurations  

- **Residential Power Distribution**:  

  Used as a branch circuit breaker in distribution panels to control lighting, sockets, water heaters, and other circuits. For example, the 6A specification is suitable for ordinary lighting lines, while the 10A specification can power centralized kitchen appliances.  

- **Small Commercial Settings**:  

  Applicable to lighting systems and low-power devices (e.g., printers, water dispensers) in offices, convenience stores, etc., forming a complete power distribution solution with Chint's NXB series miniature circuit breakers.  

- **Special Scenarios**:  

  Not suitable for directly controlling high-inductive loads such as fans or motors (risk of false tripping), but can serve as the main power switch for outdoor air conditioners, electric water heaters, and other equipment.  

# Ⅳ. Certifications and Compliance  

- **Domestic Certifications**:  

  Passed CCC mandatory certification and CQC voluntary certification, compliant with GB/T16917.1 *Circuit Breakers for Overcurrent Protection in Household and Similar Installations*, ensuring product quality and safety performance.  

- **International Standards**:  

  Although not explicitly marked with CE or UL certifications, the design complies with IEC 60898 (miniature circuit breakers) and IEC 61008 (residual current devices), meeting the needs of some export markets.  

 Ⅴ. Installation and Maintenance Recommendations  

- **Installation Key Points**:  

  Must be installed by a professional electrician. Connect the incoming line to the power supply and the outgoing line to the load, ensuring correct wiring of the neutral wire (N) and live wire (L). When mounting on a rail, secure the buckle tightly to avoid loose connections and poor contact.  

- **Maintenance Tips**:  

  Regularly check for terminal overheating (especially under high loads); tighten screws or replace the product if the housing discolors. Before reuse after long-term disuse, test the leakage function for normal operation.  

 Ⅵ. Cost-Effectiveness and Competitor Comparison  

- **Price Advantage**:  

  Priced at approximately CNY 20–30 per unit, it offers significant cost savings compared to similar products from Schneider and ABB (priced at CNY 50–80), making it suitable for budget-conscious households and small businesses.  

- **Functional Trade-offs**:  

  Compared to Schneider's iC65 series, the NXBLE-40C6 has a slightly lower breaking capacity (4.5kA vs. 6kA) and protection rating (IP20 vs. IP40), but fully meets residential requirements. Compared to Delixi's DZ47LE series, the NXBLE-40 features a smaller size and dual-inlet/dual-outlet design for easier installation.  

 Ⅶ. Precautions  

- **Load Matching**:  

  Avoid overloading a single circuit with too many appliances. For example, the maximum load for the 6A specification is 1.3kW; if using a space heater (2000W) and hairdryer (1500W) simultaneously, connect them to separate circuits.  

- **Grounding Requirements**:  

  Ensure proper circuit grounding (TT or TN-C-S system); otherwise, the leakage protection function may fail. If the distribution panel lacks a dedicated ground wire, prioritize circuit renovation.  

- **Obsolescence Risk**:  

  Electronic RCCBs have a lifespan of approximately 10 years. Even if functioning normally, replace them after the expiration date to avoid misoperation or failure due to component aging.  

In summary, the Chint NXBLE-40C6 has become a mainstream choice for residential and small commercial power distribution due to its high cost-effectiveness, easy installation, and reliable safety performance, particularly suitable for cost-sensitive scenarios requiring basic electrical safety. When selecting a model, choose the appropriate specification based on actual load current and installation environment, and strictly follow electrical installation codes.