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16A 1 Pole B Curve 6KA MCB (NB1‑63B1P16)

CHINT 16A 1 Pole B Curve 6KA MCB (NB1‑63B1P16) is a compact, DIN-rail mountable miniature circuit breaker with B-curve protection for everyday electrical circuits, offering reliable overload and short-circuit safety.

Trusted Circuit Protection – Protects against overload and short circuits in low-voltage circuits. Ideal for Household & Commercial Use – The B curve is perfect for lighting and general power loads. High Breaking Capacity – 6kA rating helps ensure safe disconnection under fault conditions. Easy DIN Rail Installation – Fits standard EN60715 rails for quick electrical panel setup. Compact & Durable – Space-saving design with robust build quality for long-lasting use.
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SKU: NB1-63B1P16
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Product Details

The 16A 1 Pole B Curve 6KA MCB (SKU NB1‑63B1P16) from CHINT is a reliable miniature circuit breaker designed to protect your electrical circuits from overload and short-circuit faults. Built to meet industrial standards, this compact MCB delivers dependable protection for single-phase installations, making it an excellent choice for domestic, commercial, and light industrial use.

Engineered with a B-curve tripping characteristic, this breaker responds quickly to overcurrent conditions typically found in lighting, heating, and other resistive loads. The 16 amp rated current and 6kA breaking capacity ensure it can disconnect faulty circuits safely under high-fault conditions.

Mounting on a standard DIN rail makes installation fast and secure, whether you are upgrading a consumer unit or expanding an electrical distribution board. The unit operates on 230/400V AC systems, offering versatility across a range of UK electrical environments. Its robust yet compact design helps save panel space while maintaining high performance.

The clearly marked ON/OFF switch makes operation intuitive, and the device’s construction meets essential safety standards for circuit protection. With a single pole configuration, this MCB protects one live conductor while isolating the circuit in the event of a fault.

Whether you are a professional electrician or a DIY installer, the CHINT NB1‑63B1P16 offers peace of mind through solid performance and consistent safety. Ideal for lighting circuits, general power outlets, and small appliance circuits, this breaker combines quality with value in a trusted brand package.

Product Specifications

Electrical Specifications

  • Model: NB1-63B1P16
  • Rated Current (In): 16A
  • Number of Poles: 1P
  • Tripping Curve: B Curve (3-5 In)
  • Rated Voltage (Ue): 230/400V AC
  • Rated Frequency: 50/60Hz
  • Rated Short-circuit Capacity (Icn): 6,000A (6kA)
  • Rated Insulation Voltage (Ui): 500V
  • Rated Impulse Withstand Voltage (Uimp): 4,000V (4kV)
  • Energy Limiting Class: 3
  • Power Loss per Pole: 3.5W
  • Release Type: Thermo-magnetic

Mechanical & Installation Data

  • Mounting: 35mm DIN Rail (EN 60715) via fast clip device
  • Terminal Connection Type: Cable / U-type busbar / Pin-type busbar
  • Terminal Size (Cable): Up to 25mm² (18-4 AWG)
  • Terminal Size (Busbar): Up to 10mm² (18-8 AWG)
  • Tightening Torque: 2.5 N·m (22 In-lbs)
  • Connection Direction: From top and bottom
  • Electrical Life: 4,000 operations
  • Mechanical Life: 20,000 operations
  • Protection Degree: IP20
  • Contact Position Indicator: Yes (Color-coded visual indication)

Environmental Specifications

  • Ambient Operating Temperature: -5°C to +40°C (Daily average ≤ 35°C)
  • Storage Temperature: -25°C to +70°C
  • Reference Temperature for Tripping: 30°C
  • Pollution Degree: 2

Dimensions

  • Width: 18mm (1 module)
  • Height: 86mm
  • Overall Depth: 78mm

Key Features

  • Versatile Application: Suitable for domestic installations as well as commercial and industrial electrical distribution systems.
  • Integrated Safety: Features a trip-free mechanism, ensuring the device operation cannot be defeated by holding the operator in the "ON" position.
  • Advanced Cooling: Designed with a heat dissipation gap to provide better cooling during operation.
  • Visual Monitoring: Equipped with a color-coded contact position indicator that provides visual confirmation of the device status and insulation function.
  • Flexible Installation: Features an extendable DIN-rail holder for easy installation and terminals that accept both wire and busbar connections for reduced installation costs.

Standards & Compliance

  • Standard: IEC/EN 60898-1
  • Certification: CE Marked, ASTA Licensed, VDE, KEMA, SEMKO, RCC, UL Verified

Shipping & Collection

Tracked Delivery (Currently 1-3 business days):

  • Free over £250.
  • £5.99 for orders under £250.
  • £5.99 for orders under £50.

Next Business Day Delivery:

  • £15 Flat Rate.

Collection:

  • Free to collect from our warehouse.

Pre-Order:

  • 5-10 Business Days delivery unless otherwise stated.

Shipping Policy

Datasheets
16A 1 Pole B Curve 6KA MCB (NB1‑63B1P16) - Data Sheet
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