Chint NXB63-1P-C16 Circuit Breaker

Chint NXB63-1P-C16 Circuit Breaker: Function, Parameters and Application Guide

1. Core Functions and Technical Parameters

The Chint NXB63-1P-C16 Circuit Breaker is a miniature circuit breaker (MCB) specially designed for single-phase circuits. Its core functions include:

1. Overload Protection

Tripping Curve: Type C curve (suitable for lighting and general power distribution loads), which can withstand a short-term impact of 5-10 volte la corrente nominale.

Setting Current: 16UN. When the circuit current exceeds 16A, the bimetallic strip heats up and bends to trigger tripping. The response time varies with the degree of overload (Per esempio, it will operate within about 1 hour when the current is 1.5 volte la corrente nominale).

2. Short-circuit Protection

Instantaneous Tripping: When the current reaches 10 volte la corrente nominale (160UN), the electromagnetic tripping device cuts off the circuit within 0.1 seconds.

Capacità di interruzione: 6IL (suitable for residential and small commercial scenarios, and can safely cut off the short-circuit current).

3. Under-voltage Protection

Automatic Tripping: When the voltage is lower than 70% of the rated voltage (Per esempio, lower than 154V in a 220V circuit), the circuit breaker automatically disconnects.

4. Isolation Function

Manual Operation: The on-off control of the circuit is realized through the handle, and it supports the indication of the “on-off” status.

Key Parameters:

1. Applicable Scenarios and Typical Applications
2. Residential Power Distribution

Lighting Circuit: The single-pole 16A is suitable for the combined load of multiple LED lamps or small electrical appliances (come i tifosi, chargers).

Socket Circuit: It can protect a single or multiple ordinary sockets (to avoid overload or short-circuit).

2. Commercial and Light Industry

Small Equipment: It provides power supply protection for office equipment such as coffee machines, stampanti, and projectors.

Temporary Power Supply: Overload protection for temporary distribution boxes at construction sites or exhibitions.

3. Replacement and Upgrade:

Replacement of DZ47 Series: NXB63 is an upgraded version of DZ47. It is dimensionally compatible (width 18mm), but the breaking capacity is increased to 6kA.

III. Installation and Wiring Guide

1. Physical Installation:

Rail Fixing: It supports installation on a 35mm standard DIN rail and is quickly fixed by a snap spring.

Size Reference: 81mm×18mm×77.8mm (Length×Width×Height), risparmiare spazio nella scatola di distribuzione.

2. Electrical Connection:

Incoming Line Terminal: Connect the live wire (l) of the power supply to the “incoming line” terminal of the circuit breaker.

Outgoing Line Terminal: Connect the live wire of the load to the “outgoing line” terminal, and the neutral wire (N) is directly connected to the neutral wire busbar of the distribution box.

Precauzioni:

– The tightening torque of the terminal needs to reach 2.5N·m to avoid overheating caused by poor contact.

– Recommended wire cross-sectional area: 1.5-4mm² (copper wire).

3. Debugging and Testing:

Manual Test: After closing the switch, gently touch the handle with an insulated tool to confirm that the tripping function is normal.

Load Test: Gradually increase the load to 1.13 volte la corrente nominale (18UN) and observe whether it trips within 1 hour.

1. Certificazione e Conformità
2. Domestic Certification:

CCC Certification: It complies with the Chinese Compulsory Product Certification Standard (Certificate Number: 202408…).

GB/T 10963.1: It complies with the national standard for overcurrent protection circuit breakers for household and similar installations.

2. International Compatibility:

CE Certification: Some models (such as NXB-63H) have passed the EU certification, but the specific model needs to be confirmed.

UL Certification: It is not clearly mentioned in the search results. For the US market, it is recommended to choose Square D QO series or Eaton BR series as alternatives.

1. Acquisto e soluzioni alternative
2. Procurement Channels:

Log in to www.transformerandswitchgear.com or contact Whatsapp: 0086-13811255435

2. Modelli alternativi:

Same Brand: NXB63-1P-C20 (20UN) or NXB63-2P-C16 (Two-pole 16A).

Other Brands:

Schneider: iC65N 1P C16 (Breaking capacity 6kA, compatible with rail installation).

Siemens: 5SJ6 116-7 (Breaking capacity 6kA, with a test button).

1. Common Problems and Maintenance Suggestions
2. Reasons for Frequent Tripping:

Overload: Check whether the total load exceeds 16A (such as 16A×220V = 3520W).

Short-circuit: Use a multimeter to detect the insulation resistance of the circuit and check for short-circuit points.

Poor Contact: Check whether the terminals are loose and whether the wires are oxidized.

2. Maintenance Key Points:

Ispezione regolare: Manually operate the circuit breaker once a quarter to ensure that the mechanical parts are flexible.

Cleaning and Maintenance: Wipe off the dust with a dry cloth to prevent metal debris from entering the interior.

Life Prompt: If the number of tripping times exceeds 10,000 volte, it is recommended to replace the circuit breaker.

VII. Summary and Suggestions

Core Advantages: High cost-performance, small size, and the breaking capacity meets the standard, suitable for family and small commercial scenarios.

Limitations: No leakage protection function (needs to be used with a leakage circuit breaker), and the UL certification needs to be confirmed for the US market.

Action Suggestions:

1. Check the load power before installation to ensure that it does not exceed the 16A capacity.
2. If leakage protection is required, choose NXB63-1P+N-C16 (with neutral wire) or an external leakage module.
3. US users should give priority to Square D QO116 (1P 16A, UL certification) or Eaton BR116.

The Price of Chint NXB63-1P-C16 Circuit Breaker

The price of Chint NXB63-1P-C16 circuit breaker varies significantly due to factors such as procurement channels, regions, quantity, and promotional activities. The following is a detailed analysis and procurement suggestions combined with domestic and international markets:

1. Domestic Market Price Reference (RMB)
2. Retail Price

Chint Official Website/Dealers: The guided price is about WA：0086-13811255435 yuan per piece. Bulk purchases can enjoy discounts (Per esempio, the starting price for an order of 100 pieces is about WA：0086-13811255435yuan per piece).

2. Wholesale Price

Agents: Suppliers such as Hebei china Electric offer an ex-factory price of WA：0086-13811255435 yuan per piece (including freight), which is suitable for small-batch purchases.

1. International Market Price Reference (USD)
2. US Market

Amazon/eBay: The quotations from purchasing agents or third-party sellers are about $WA：0086-13811255435 per piece (including freight), but it should be noted that:

– Some sellers may not have passed the UL certification, posing a compliance risk.

– Since February 2025, the United States has imposed an additional 10% tariff on goods originating in China, and additional taxes need to be paid.

Alternative Brands:

Square D QO116 (1P 16A, UL certification): About WA：0086-13811255435 per piece.

Eaton BR116 (1P 16A, UL certification): About WA：0086-13811255435 per piece.

2. European Market

Models with CE Certification: Purchased through Hebei china Electric, the wholesale price for an order of 100 pieces or more is about €0.8-1.2 per piece (excluding freight), but it is necessary to confirm whether it meets local standards.

III. Analysis of Price Influencing Factors

1. Certification Costs

UL Certification: The Chint NXB63 series has not been clearly confirmed to have passed the UL certification. If it is required for use in the US market, an alternative brand (such as Square D) needs to be selected, and the price is about 2-3 volte quello di Chint.

CE Certification: Some models (such as NXB-63H) have passed the EU certification, and the price is 15-20% higher than that of the domestic version.

2. Transportation and Tariffs

International Freight: The express delivery cost from China to the United States is about WA：0086-13811255435 per piece (for less than 10 pezzi), and it can be reduced to $1-2 per piece for bulk purchases by sea freight.

Tariff Calculation:

– Basic Tariff: The import tax rate of circuit breakers in the United States is about 2.5% (calculated according to the CIF price).

– Additional Tariff: An additional 10% has been imposed since February 2025, increasing the total cost by 12.5% (Per esempio, if the value of the goods is $10, the tariff is $1.25).

1. Procurement Suggestions

Engineering Procurement: Contact Chint agents (such as Hebei china Electric) for bulk purchases. The unit price can be as low as WA：0086-13811255435 yuan per piece for an order of more than 100 pezzi.

2. US Users

Short-term Demand: Purchase products from third-party sellers on Amazon ($5-8 per piece), but it is necessary to confirm whether they have UL certification.

Long-term Compliance: Choose Square D QO116 or Eaton BR116 ($WA：0086-13811255435 per piece) to ensure compliance with local standards.

3. European Users

Direct Procurement: Contact suppliers such as Zhejiang Jingchuang Automation through Alibaba.com. The wholesale price for an order of 100 pieces or more is about €0.8 per piece, with CE certification.

Soluzioni alternative: Choose Schneider iC65N 1P C16 (€WA：0086-13811255435 per piece), which has higher compatibility.

1. Precauzioni
2. Certification Risks: Using a circuit breaker without UL certification in the United States may lead to the invalidation of insurance or failure to pass safety inspections. It is recommended to give priority to compliant products.
3. Transportation Time: International express delivery (such as DHL) takes about 3-5 working days, and sea freight takes 20-30 days. It is necessary to plan in advance.
4. Tax Declaration: When importing into the United States, a commercial invoice needs to be submitted, and the declared value is recommended to be filled in according to the actual payment amount to avoid customs clearance problems.

For the latest quotation, you can obtain it through the following channels:

International: Chint International Website www.transformerandswitchgear.com