Miniature Circuit Breaker HiSmart NV821525 3‑pole 16A C‑curve

HiSmart NV821525 is a 3-pole miniature circuit breaker rated at 16 A with a C-characteristic, designed to protect three-phase circuits from overloads and short circuits. It is suitable for installation on a 35 mm DIN rail and provides a compact, robust solution for residential and light commercial distribution boards. The device features a clear contact position indicator and supports top and bottom connections for cables and pin-type busbars.

Advantages

The breaker offers overload and short-circuit protection with a rated breaking capacity of 6 kA and complies with IEC/EN 60898-1 standards. It has flame-retardant housing with high temperature and impact resistance, a mistake-proof terminal block, and a visual contact position indicator (red = closed, green = open). Mechanical life is rated to 20,000 operations and electrical life to 8,000 operations.

Suitable for

• Protection of three-phase circuits in residential distribution boards
• Light commercial electrical installations
• DIN-rail mounted panels requiring a compact 3-pole breaker

Key specifications

• Number of poles: 3
• Rated current (In): 16 A
• Tripping characteristic: Class C (C-curve)
• Rated operational voltage (Ue): AC 400 V
• Rated insulation voltage (Ui): 500 V
• Rated frequency: 50/60 Hz
• Rated ultimate short-circuit breaking capacity (Icu): 6000 A
• Rated impulse withstand voltage (Uimp): 6000 V
• Mechanical life: 20,000 operations
• Electrical life: 8,000 operations
• Protection class: IP20
• Terminal connection: cable / pin-type busbar, top and bottom connections
• 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: NV821525, EAN: 6942034315764
• Warranty: 24 months

How to use

Install the HiSmart NV821525 on a 35 mm DIN rail according to EN 60715 using the fast clip device. Make electrical connections from top and bottom for either cable or pin-type busbar, observing the specified wire and busbar cross-sections. Verify correct wiring, then set the breaker into the closed position; the red indicator shows closed, green shows open. Ensure that the supply is de-energised before installation and follow local wiring regulations and safety practices.

Recommendations

Use this 3-pole 16 A C-curve breaker for protection of three-phase circuits with expected inrush currents (motors, small compressors) where a C characteristic is appropriate; avoid environments exceeding the stated temperature range and ensure periodic inspection in accordance with local electrical standards.