Interruttore differenziale magnetotermico HiSmart NV821884 20A 30mA interruttore FI/LS

Residual Current Breaker HiSmart NV821884 is a 2-pole protective device rated at 20 A with 30 mA residual current sensitivity. It combines overcurrent protection and earth-leakage detection to disconnect supply in the event of overloads, short circuits or dangerous leakage currents. Designed for installation on a 35 mm DIN rail, the device is suitable for residential and light commercial electrical circuits and meets IEC 61009-1 / EN 61009-1 standards.

Advantages

The RCBO provides combined protection against overloads, short circuits and earth leakage in a single compact unit. It features an anti-mistake contact terminal block and clear contact position indication (red = closed, green = open). The housing is flame retardant, temperature-resistant and impact-resistant, and the device supports both cable and pin-type busbar connections for flexible installation.

Suitable for

• Residential electrical distribution boards
• Light commercial circuits and small offices
• Protection of branch circuits with combined RCD and MCB requirements
• DIN-rail installations requiring 2-pole 20 A protection

Key specifications

• Number of poles: 2
• Rated current (In): 20 A
• Tripping characteristic: Class C
• Residual sensitivity: 30 mA
• Rated voltage (Ue): AC 230 V
• Rated short-circuit capacity (Icn): 6000 A
• Rated impulse withstand voltage (Uimp): 4000 V
• Insulation voltage (Ui): 500 V
• Frequency: 50/60 Hz
• Break time: ≤ 0.1 s
• Electrical life: 4000 operations; Mechanical life: 10000 operations
• Protection degree: IP20
• Connection type: cable or pin-type busbar, top entry; wire/busbar up to 35 mm²
• Mounting: DIN rail EN 60715 (35 mm)
• Operating temperature: -25 °C to +70 °C
• Dimensions: 82 x 36 x 78 mm
• Standards: IEC 61009-1 / EN 61009-1

How to use

Install the HiSmart NV821884 on a standard 35 mm DIN rail and connect incoming and outgoing conductors to the top terminals according to the wiring diagram. Ensure correct polarity and tighten terminals to the manufacturer’s torque recommendations. Use the device in circuits up to 20 A and verify that the residual current sensitivity of 30 mA is appropriate for the protected loads. After installation, test the trip function using the built-in test button or appropriate test equipment.

Recommendations

Use this RCBO where combined overcurrent and earth-leakage protection is required; verify compatibility with upstream and downstream protective devices and perform periodic testing. Do not exceed rated current or environmental limits specified by the manufacturer.