Miniature Circuit Breaker HiSmart NV821471 1P 50A Class C

Miniature Circuit Breaker HiSmart NV821471 is a single-pole (1P) protective device with a rated current of 50 A and Class C tripping characteristic. Designed for DIN-rail installation in residential and light commercial electrical panels, it provides thermal-magnetic protection against overloads and short circuits, with a compact form factor and manual on/off operation. The breaker meets IEC 60898-1 / EN 60898-1 standards and is suitable for AC 230/400 V systems.

Advantages

The HiSmart NV821471 offers short-circuit and overload protection with a rated breaking capacity of 6 kA and impulse withstand voltage of 6 kV. It features a flame-retardant housing with high temperature and impact resistance, an anti-mistake contact terminal block, and a visual contact position indicator (red = closed, green = open). Installation and wiring are simplified by top and bottom connections and compatibility with cable and pin-type busbar terminals.

Suitable for

• Residential distribution boards
• Light commercial electrical panels
• Protection of single-phase branch circuits
• DIN-rail installations (35 mm EN 60715)

Key specifications

• Number of poles: 1
• Rated current (In): 50 A
• Tripping class: C
• Rated voltage (Ue): AC 230/400 V
• Insulation voltage (Ui): 500 V
• Rated frequency: 50/60 Hz
• Rated breaking capacity (Icu): 6000 A
• Rated impulse withstand voltage (Uimp): 6000 V
• Mechanical life: 20,000 operations
• Electrical life: 8,000 operations
• Protection degree: IP20
• Terminal types: cable / pin-type busbar
• Wire / busbar cross-sectional area: up to 25 mm² / 18-3 AWG
• Connection: top and bottom
• Mounting: DIN-rail EN 60715 (35 mm) with fast clip
• Operating temperature: -5 °C to +40 °C (daily average <35 °C)
• Storage temperature: -25 °C to +70 °C
• Dimensions: 85.5 x 78.8 x 18 mm
• Standards: IEC 60898-1 / EN 60898-1
• Manufacturer / MPN: HiSmart NV821471

How to use

Install the HiSmart NV821471 on a 35 mm DIN rail in the distribution enclosure and secure it with the fast clip device. Connect supply and load conductors to the top and bottom terminals using appropriate cable or pin-type busbar connectors, observing the maximum cross-sectional areas. Verify correct tightening of terminals and ensure the contact position indicator reflects the intended state before energising. Use the manual switch to turn the circuit on or off during installation or maintenance tasks.

Recommendations

Use the breaker within its rated current and temperature ranges, and replace it if mechanical or electrical life limits are reached or if any damage to the housing or terminals is visible. For selection and installation, follow local wiring regulations and standards IEC 60898-1 / EN 60898-1; when in doubt, consult a qualified electrician.