SGB5-40 MCB Miniature Circuit Breaker

 
Product Overview

SGB5-40 high breaking miniature circuit breaker has the features of structure advanced, performance reliable, breaking capacity high, appearance elegant and its shell and parts are made of material with impact resistance, strong flame-retardant feature.

It is suitable to power system of 50or 60 frequency ,Ue 240V and below, Ui 40A and below.

It is mainly applied at office building, residence, for lighting , power distribution and overload and short circuit protection of equipment. Normally, it also can be used as the not frequent transfer of power system. It conforms to the standards IEC 60898-1 and GB10963.1.

• Frequently Asked Questions(FAQ)
  

  
  

  
  

• Q: Can SGB5‑40 1P+N MCB be used as household main incoming breaker?A: SGB5‑40 is 1P+N, it cuts off live wire only. It is ideal for lighting and individual branch circuits. For household main incoming which requires cutting both live and neutral, please select our 2‑pole series MCB. For heavy‑duty industrial main protection, our MCCB series is recommended.

• Q: What applications is SGB5‑40 1P+N MCB suitable for?A: SGB5‑40 1P+N MCB is widely applied for residential lighting circuits, indoor socket branches, light commercial distribution cabinets, and small‑power equipment protection. It works for 230/240V AC single‑phase systems.

• Q: Why is 6kA breaking capacity suitable for SGB5‑40 household & light‑commercial scenarios?A: Short‑circuit current in most residential and light‑commercial distribution systems is below 6kA. 6kA breaking capacity guarantees safe short‑circuit interruption, offering reliable and cost‑effective circuit protection for daily use.

• Q: What certificates does SGB5‑40 MCB have?A: SGB5‑40 MCB is certified with CE, CB, ISO9001 and CCC. It complies with EN60898‑1, AS/NZS IEC 60898‑1 and GB/T10963.1 standards, acceptable for global wholesale and project procurement.

• Q: What is the service life of SGB5‑40 1P+N MCB?A: Its mechanical life reaches 5,000 switching cycles. Under normal installation and working condition (-25℃ ~ +70℃), the expected service life is 8‑12 years. Please replace it once you notice overheating, abnormal tripping or housing aging.

Company Profile

SINGI is a premier manufacturer of the SGB5‑40 series 1P+N MCB, leveraging over 30 years of production expertise to deliver high‑quality circuit protection. Our SGB5‑40 line is produced in our ISO9001‑certified facility using automated assembly to ensure consistency and reliability. Trusted by global wholesalers, SINGI's SGB5‑40 breakers carry CE / CB / ISO9001 / CCC certifications, making them the benchmark for safety and value in the low‑voltage electrical market.

key word:MCB ,Miniature circuit breaker,1P MCB,China manufacturer

Application Scenario

1.Residential and Commercial Buildings

Residential Electrical Protection: In ordinary residential houses, MCBs are used to protect circuits for lighting, sockets, air conditioners, water heaters, and other appliances. If a short circuit or overload occurs in an appliance, the MCB can shuts off the power quickly , preventing overheating and fires from wires, ensuring the safety of people and property.

Commercial Space Protection: In commercial space like office building, shopping mall, and hotel, MCBs are used to protect circuits for various office equipment, lighting systems, and air conditioning systems. The MCBs can prevent circuit overloads and short circuits quickly which is caused by equipment failure or human error, ensuring the safety of people and property.

2.Industrial Sector

Small Equipment Protection: In industrial production, many small equipment and machinery require MCBs for circuit protection. For example, small machine tools and power tools require MCBs to prevent damage from abnormal current flow during operation, extending their service life.

Control Circuit Protection: In complex industrial control systems, MCBs are used to protect the normal operation of control circuits. They ensure that power is promptly cut off in the event of a fault, preventing damage to the control system and thus ensuring the stability and safety of the entire industrial process.

3.Lighting Systems

Public Lighting: In public lighting spaces like street lighting, square lighting, and park lighting, MCBs are used to protect lighting circuits. MCBs can prevent short circuits and overloads which is caused by lamp failures or aging wiring, ensuring the reliability of the lamps and providing a safe nighttime environment.

Large Indoor Lighting: MCBs also is important in the indoor lighting systems of large buildings, like shopping malls, stadiums, and exhibition halls. They protect lighting circuits stably, preventing electrical failures that can occur due to a large number of lamps and complex wiring, and ensuring the normal operation of indoor lighting.

4. Low-Voltage Power Distribution System

Core Component of Distribution Boxes: In low-voltage power distribution systems, MCBs are standard features in distribution boxes and cabinets. They provide independent protection and control for each branch circuit and can be flexibly configured based on actual power load. They are key to achieving intelligent power distribution management and comprehensive system protection.

A safety benchmark for temporary power use: Construction sites, outdoor activities, and other temporary power-using environments present complex electrical environments and numerous potential safety hazards. MCBs provide essential safety protection for these temporary equipment and lines, ensuring proper operation even in these complex power-using environments and minimizing electrical safety incidents.