Overcurrent circuit breaker Icn=10000A / Icu=15kA 3P D 32A NDN332

Three-phase overcurrent circuit breaker – reliable installation protection

This three-phase overcurrent circuit breaker from Hager, with a rated current of 32A and D characteristic, is a key element of every safe and efficient electrical installation. Designed to protect circuits exposed to high inrush currents, it is perfect for commercial and industrial applications, as well as demanding home installations. Its compact design (3 modules) allows for easy mounting in distribution boards.

Functionality and technical parameters

This circuit breaker is characterized by a high short-circuit breaking capacity – up to 10kA at 400V (according to EN 60898) and 15kA at 400V (according to IEC 60947-2). This ensures effective protection against the effects of overloads and short circuits, minimizing the risk of damage to equipment and fires. The D characteristic guarantees that the circuit breaker will not trip unnecessarily during short-term current surges, typical for starting motors or other high-power devices. Suitable for operation in temperatures from -25°C to +70°C, it maintains reliability even in difficult conditions.

• Wide connection range: The ability to connect solid conductors with a cross-section of 1-35 mm² and stranded conductors 1-25 mm² provides flexibility during installation.
• Flush mounting: Allows for aesthetic and discreet placement of the circuit breaker in the wall or other structural elements.
• Versatility: Suitable for AC installations with a rated voltage of 400V and a frequency of 50-60 Hz.
• Safety: Energy limitation class 3 and surge category III provide a high level of protection against the effects of overvoltage.
• Durability: Electrical endurance of 4000 cycles and mechanical endurance of 20,000 cycles guarantee long and trouble-free operation of the device.

Application and compliance with standards

The NDN332 circuit breaker meets the requirements of EN 60898 and IEC 60947-2 standards, confirming its safety and reliability. It is ideally suited for protecting circuits powering:

• Electric motors
• Industrial equipment
• High-power lighting
• Heating devices
• Other loads generating high inrush currents

The IP20 degree of protection protects against finger contact, increasing safety. The circuit breaker is compatible with DIN rails, which facilitates its installation and replacement.