Selected shop:

Selected shop:

20A 3-Pole MCB – Hager NCN320A C Curve 10/15kA

SKU: NCN320A

Hager NCN320A is a 20A 3-pole MCB with C curve and dual 10/15kA breaking capacity. Designed for three-phase commercial and light industrial protection.

MCB 3P 10ka/15ka C-20A 3M

£38.37 EX. VAT

Description

The Hager NCN320A is a robust 20A 3-pole MCB (Miniature Circuit Breaker) designed for reliable protection of three-phase electrical installations in commercial, light industrial, and high-demand environments. It safeguards equipment and wiring from both overloads and short circuits, providing dependable performance where safety is critical.

This breaker uses a C curve tripping characteristic, which activates between 5 to 10 times the rated current. It is ideal for circuits with moderate inrush currents, such as those powering motors, HVAC systems, fluorescent lighting, and general-purpose three-phase loads. The C curve strikes a balance between sensitivity and selectivity, avoiding nuisance tripping while still reacting quickly to faults.

The NCN320A offers dual breaking capacity ratings:

  • 10kA according to IEC/EN 60898

  • 15kA according to IEC/EN 60947-2
    These ratings ensure it can handle higher fault currents in demanding environments, providing added resilience in industrial applications.

With a 3-module width, the MCB fits easily into standard DIN rail-mounted enclosures and distribution boards. It is designed with secure terminals and clear labelling to support fast, error-free installation.

Key features:

  • Rated current: 20A

  • 3-pole (3P) configuration

  • C curve tripping (5–10x rated current)

  • 10kA/15kA dual breaking capacity

  • DIN rail mountable – 3 modules wide

  • Fast installation with secure terminal design

  • Fully compliant with IEC/EN 60898 & 60947-2

  • Ideal for commercial, industrial, and utility environments

Choose the Hager NCN320A 20A 3-pole MCB for professional-grade circuit protection. Whether you’re fitting out a panel for machinery, air handling units, or general three-phase power, this 20A 3-pole MCB ensures safety, compliance, and lasting reliability.

Additional information

Product

Circuit Breaker

Product Type

MCB

Pole Configuration

TP

Mounting

DIN Rail

Trip Type

Type C

Short Circuit Rating

10 kA

Cable Capacity

35 (Rigid) 25 (Flexible) mm2

Width

52.5 mm

Current Rating

20 A

Voltage

230 | 400 V

Standards

BS EN 60898

Brand

Frequently asked questions

MCBs are used in the consumer unit (distribution board) of three-phase installations to protect individual circuits. They are typically installed to protect circuits supplying sockets, lighting, appliances, and other electrical loads.

In three-phase electrical systems, MCBs provide essential protection against overcurrents that could damage wiring, equipment, and appliances. They help ensure electrical safety and prevent fire hazards caused by excessive current flow.

Yes, MCBs are generally required in three-phase installations to comply with electrical regulations (e.g., BS 7671). They are a fundamental part of circuit protection, ensuring that circuits are automatically disconnected in case of overcurrents.

MCBs for three-phase systems come in various ratings to match the current requirements of different circuits. They may also vary in characteristics such as breaking capacity (the maximum fault current they can safely interrupt) and tripping curves (to accommodate different types of loads).

When selecting an MCB for a three-phase system, consider:

  • Current Rating: Ensure the MCB’s current rating matches or slightly exceeds the maximum current expected in the circuit it protects.
  • Breaking Capacity: Choose an MCB with an adequate breaking capacity to safely interrupt the maximum fault current that could occur in the circuit.
  • Tripping Curve: Select the tripping curve (e.g., B, C, or D) based on the type of load and expected inrush currents to avoid nuisance tripping.

related products

Search for product