Interruttore automatico magnetotermico HiSmart NV821532 tripolare 20 A curva C (modulare)

Miniature circuit breaker HiSmart NV821532 is a 3-pole protective device with a rated current of 20 A and C characteristic tripping. It is designed to provide overload and short-circuit protection in three-phase AC installations, offering compact DIN-rail mounting and clear contact position indication for reliable disconnection of conductors and equipment.

Advantages

The HiSmart NV821532 offers combined overload and short-circuit protection, an anti-mistake contact terminal block, and a visible contact position indicator (red = closed, green = open). Its flame-retardant, high-temperature and impact-resistant housing increases operational safety, while the ability to connect from both top and bottom and to accept cable or pin-type busbar connections up to 25 mm² makes installation flexible.

Suitable for

• Protection of three-phase circuits in residential installations
• Overcurrent and short-circuit protection in light commercial applications
• DIN-rail modular switchgear and distribution boards

Key specifications

• Poles: 3
• Rated current: 20 A
• Tripping characteristic: C
• Rated operational 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 / pin-type busbar, up to 25 mm² (18-3 AWG)
• Connection access: 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 54 mm
• Standards: IEC 60898-1 / EN 60898-1
• Warranty: 24 months

How to use

Install the HiSmart NV821532 on a 35 mm DIN rail according to EN 60715 using the fast clip device. Ensure power is isolated before making connections. Connect phase conductors to the three pole terminals using appropriate cable or pin-type busbar up to 25 mm², and secure terminals. The breaker can be connected from top or bottom depending on panel layout. After wiring, restore supply and verify the contact position indicator: red shows closed (ON), green shows open (OFF). Follow applicable wiring regulations and local standards during installation.

Recommendations

Use this miniature circuit breaker for overcurrent and short-circuit protection in accordance with its rated current and breaking capacity. Do not exceed specified wire cross-sections or environmental limits; perform regular inspection and test tripping periodically to confirm correct operation.