Interruttore automatico magnetotermico HiSmart NV821556 tripolare 32 A curva C (modulare)

Miniature circuit breaker HiSmart NV821556 is a 3-pole protective device rated at 32 A with a C tripping characteristic. It is designed to provide overcurrent and short-circuit protection for three-phase AC circuits up to 400 V and has a rated breaking capacity of 6 kA. The device includes a visible contact position indicator and is suitable for DIN-rail (35 mm) mounting in residential, commercial and light-industrial distribution panels.

Advantages

The HiSmart NV821556 offers combined overload and short-circuit protection, a flame-retardant housing with high temperature and impact resistance, and an anti-mistake contact terminal block to reduce wiring errors. It features top-and-bottom connections for cables or pin-type busbars and a clear red/green contact position indicator for easy visual status checks.

Suitable for

• Protection of three-phase circuits in residential electrical panels
• Commercial electrical distribution and small businesses
• Light industrial installations requiring DIN-rail mounted protection

Key specifications

• Number of poles: 3
• Rated current (In): 32 A
• Tripping characteristic: Class C
• Rated voltage (Ue): AC 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 connection: cable or pin-type busbar (top and bottom)
• Wire/busbar cross-section: up to 25 mm² / 18-3 AWG
• 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 54 mm
• Standards: IEC 60898-1 / EN 60898-1
• Manufacturer: HiSmart, MPN NV821556, EAN 6942034315795

How to use

Mount the breaker on a standard 35 mm DIN rail using the fast clip device. Connect incoming and outgoing conductors to the top and bottom terminals respectively, ensuring conductor cross-section does not exceed 25 mm² or 18-3 AWG for busbars. Verify tight and correct connection to the anti-mistake terminal block and confirm the contact position indicator shows the expected state. Use the breaker to protect three-phase circuits at up to 400 V AC and check connections and tightness after installation.

Recommendations

Install and maintain the device according to local electrical codes and the IEC/EN 60898-1 standard. Ensure the operating environment remains within the specified temperature range and perform periodic inspections of terminals and mechanical condition. Replace the breaker if mechanical or electrical life limits are exceeded or if physical damage is observed.