Circuit breaker HiSmart NV821457 1P 32A C-characteristic (single-pole) miniature protection device

Miniature circuit breaker HiSmart NV821457 is a single-pole (1P) protective device rated at 32 A with a C-type tripping characteristic. It is designed to provide protection against overloads and short circuits in residential and light commercial electrical installations. The device supports DIN-rail (EN 60715, 35 mm) mounting and offers top and bottom connections for cables or pin-type busbars, enabling protection of lighting, sockets and small appliances.

Advantages

The HiSmart NV821457 features thermal-magnetic C-characteristic tripping for reliable disconnection under overload and short-circuit conditions. It includes an anti-mistake contact terminal block, contact position indication (red = closed, green = open), and a flame-retardant housing with high temperature and impact resistance. The breaker has a rated breaking capacity of 6 kA, compact dimensions (85.5 x 78.8 x 18 mm) and is suitable for standard DIN-rail installation.

Suitable for

• Protection of lighting circuits
• Protection of socket outlets and small appliances
• Residential and light commercial electrical panels

Key specifications

• Number of poles: 1
• Rated current (In): 32 A
• Characteristic: C (thermal-magnetic)
• Rated voltage (Ue): AC 230/400 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
• Safety class: IP20
• Terminal connection type: cable / pin-type busbar
• Wire / busbar cross-sectional area: 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 18 mm
• Standards: IEC 60898-1 / EN 60898-1
• Warranty: 24 months

How to use

Install the breaker on a 35 mm DIN rail in the electrical distribution board using the fast clip device. Connect supply and load conductors to the top and bottom terminals respectively, ensuring conductor cross-sections do not exceed the specified limits (up to 25 mm² or 18-3 AWG). Observe proper tightening torque for terminals and verify correct contact position indication (red closed, green open) after wiring. Use the breaker to protect individual lighting circuits, socket circuits or small appliance circuits according to the panel design.

Recommendations

Place the breaker in an environment within the specified operating temperature range (-5°C to +40°C) and avoid exposure to moisture or corrosive atmospheres. Ensure coordination with upstream and downstream protective devices and follow local electrical codes during installation and maintenance.