Miniature Circuit Breaker HiSmart NV821631 4P 40A

HiSmart NV821631 is a four-pole miniature circuit breaker with a 40 A rated current and C tripping characteristic. It is designed to provide overload and short-circuit protection for residential, commercial and light industrial distribution panels, and mounts on a 35 mm DIN rail for compact installation. The device features manual operation with clear contact position indication and supports top and bottom cable or pin-type busbar connections.

Advantages

The breaker offers selective overload and short-circuit protection with a 6 kA rated breaking capacity and complies with IEC/EN 60898-1. Flame-retardant housing with high temperature and impact resistance improves durability. A mistake-proof contact terminal block and visible red/green contact position indicator simplify installation and maintenance. It supports conductors up to 25 mm² and ensures reliable mechanical and electrical life.

Suitable for

• Residential distribution boards requiring 4-pole protection
• Commercial electrical panels and lighting circuits
• Light industrial installations and small machinery circuits
• DIN-rail distribution assemblies with space constraints

Key specifications

• Poles: 4P
• Rated current (In): 40 A
• Tripping 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: 20000 operations
• Electrical life: 8000 operations
• Protection class: IP20
• Terminal connection: cable or pin-type busbar, top and bottom
• Wire/busbar capacity: up to 25 mm² / 18-3 AWG
• Installation: DIN rail EN 60715 (35 mm) with fast clip
• Operating temperature: -5°C to +40°C (daily average <35°C)
• Dimensions: 85.5 × 78.8 × 71.5 mm
• Standards: IEC 60898-1 / EN 60898-1
• Warranty: 24 months

How to use

Install the HiSmart NV821631 on a standard 35 mm DIN rail using the fast clip device. Connect conductors or a pin-type busbar to the top and bottom terminals, observing the maximum cross-sectional area and tightening torques recommended for your installation. Use the manual toggle to switch the circuit on and off; the red/green indicator shows contact position. Verify correct wiring and perform commissioning tests according to local electrical codes before putting the circuit into regular service.

Recommendations

Use this circuit breaker in distribution panels sized for 4-pole protection, avoid operating above the rated current and ambient temperature limits, and service or replace the device if mechanical or electrical performance degrades. Follow applicable installation standards and safety practices when wiring and testing.