Interruttore automatico HiSmart NV821655 4 poli 63A curva C (interruttore magnetotermico)

HiSmart NV821655 is a 4-pole miniature circuit breaker rated 63 A with a C trip characteristic, designed for overcurrent and short-circuit protection in residential and light commercial electrical installations. The device provides switching and fault isolation for multi-phase circuits and is suitable for DIN-rail mounting in distribution boards.

Advantages

The breaker offers combined overload and short-circuit protection with a rated breaking capacity of 6 kA and clear contact position indication (red = closed, green = open). It features an anti-mistake contact terminal block, flame-retardant and impact-resistant materials, and supports both cable and pin-type busbar connections. Compact dimensions and standard DIN-rail mounting simplify installation.

Suitable for

• Residential electrical distribution panels
• Light commercial and small industrial three-phase circuits
• Protection of multi-pole feeders and loads
• Retrofit or new DIN-rail distribution board installations

Key specifications

• Number of poles: 4
• Rated current (In): 63 A
• Tripping characteristic: C-curve
• Rated voltage (Ue): AC 400 V
• Insulation voltage (Ui): 500 V
• Rated frequency: 50/60 Hz
• Rated breaking capacity (Icu): 6000 A (6 kA)
• Rated impulse withstand voltage (Uimp): 6000 V
• Mechanical life: 20,000 operations
• Electrical life: 8,000 operations
• Protection class: IP20
• Terminal connection: cable or pin-type busbar; cross-section up to 25 mm² / 18-3 AWG
• Connection: top and bottom
• Installation: 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 71.5 mm
• Standards: IEC 60898-1 / EN 60898-1

How to use

Install the HiSmart NV821655 on a 35 mm DIN rail in the distribution board using the fast clip device. Make electrical connections at the top and bottom terminals using appropriate cable or pin-type busbar conductors within the specified cross-sectional limits. Ensure the main supply is isolated before wiring. After installation, switch the breaker on and verify the contact position indicator (red when closed). Follow local electrical codes for earthing and circuit identification.

Recommendations

Use this 4-pole 63 A C-curve breaker for multi-phase protection where inrush currents are expected; select the device as part of a coordinated protection scheme and ensure the breaker’s rated breaking capacity and operating environment meet the application requirements.