20A 1 Pole B Curve 6KA MCB (NB1‑63B1P20)
20A 1 Pole B Curve 6KA MCB (NB1‑63B1P20)
SKU:NB1-63B1P20
Brand: CHINT
In stock
This is pre-order - Available in 7 – 10 days
Couldn't load pickup availability
Product Details
Product Details
The 20A 1 Pole B Curve 6KA MCB (NB1‑63B1P20) is a reliable miniature circuit breaker from CHINT’s NB1‑63 series, designed to safeguard domestic and commercial electrical circuits. Built to deliver dependable overload and short-circuit protection, this MCB is ideal for new installations or upgrades in consumer units, distribution boards and control panels.
Constructed with a robust plastic enclosure, this single-pole breaker fits neatly on a standard TH35 DIN rail and occupies just one modular width (18 mm), making it perfect for modern compact electrical setups. It is rated for 20 amps continuous current and features a B-curve tripping characteristic, which means it responds quickly to slight overloads typical in lighting circuits and general power outlets without unnecessary nuisance trips.
With a 6 kA breaking capacity, this MCB can interrupt fault currents up to 6000 amps, delivering high-level protection against fault conditions while maintaining safety compliance for standard UK 230 V AC systems. The thermal-magnetic mechanism ensures consistent performance across a wide range of temperatures, while the clear on/off indication makes operation intuitive even for homeowners or DIY electrics enthusiasts.
Installation is straightforward thanks to top and bottom feed terminals that accommodate cable sizes suitable for typical ring or radial circuits, and the compact dimensions help retain valuable space within your consumer unit. Whether you are wiring new circuits, replacing an old breaker, or specifying components for a professional electrical project, the NB1‑63B1P20 delivers effective circuit protection you can trust.
Product Specifications
Product Specifications
Electrical Specifications
- Model: NB1-63B1P20
- Rated Current (In): 20A
- 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
- Reliable Protection: Engineered to protect circuits against short-circuit and overload currents, specifically for TN and IT earthing systems.
- Integrated Safety: Features a trip-free mechanism, ensuring the circuit breaker operation cannot be defeated by holding the handle in the "ON" position.
- Efficient Cooling: Includes a built-in heat dissipation gap to provide better cooling during sustained operation.
- Visual Status Monitoring: Equipped with a color-coded contact position indicator that provides clear 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 various busbar types for reduced installation costs.
Standards & Compliance
- Primary Standard: IEC/EN 60898-1
- Certification: CE Marked, ASTA Licensed, VDE, KEMA, SEMKO, RCC, UL Verified
Product Downloads
Product Downloads
