Products catalog

  • Modular protective DC circuit breaker for solar modules 2P | 125A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS

    Code: HSA3-DC-2125500

    The HSA3-DC series direct current miniature circuit breaker (MCB) is a reliable protection solution for low-voltage DC circuits. This 2-pole, 125A circuit breaker with a C-curve characteristic and thermal-magnetic trip mechanism is designed to protect equipment from overcurrents and short circuits. Suitable for use in industrial, commercial, or solar power systems where precise response and durable protection are essential.

  • Technical Specifications:

    Number of poles: 2P

    Rated operational voltage (Ue): 500V DC

    Rated current (In): 125A 

    Rated insulation voltage (Ui): 500V DC

    Rated impulse withstand voltage (Uimp): 4kV

    Maximum breaking capacity (Icn): 10 kA

    Service breaking capacity (Ics): 75% Icn

    Tripping curve: C curve (1–15 In)

    Tripping mechanism: Thermal and magnetic

    Mechanical endurance: 10,000 cycles

    Electrical endurance: 1,000 cycles

    Wires: In ≤ 32A: 1–25 mm²; In ≥ 40A: 10–25 mm²

    Mounting: On DIN rail (standard)

    Operating temperature: -20°C to +70°C

    Altitude: ≤ 2000 m

    Relative humidity: ≤ 90%

    Pollution degree: 2

    Environment: Without strong vibrations or shocks

    Dimensions: 36x81x75 mm

    Weight: 0.21 kg 

    Features:

    Protection against overload and short circuit

    Suitable for DC systems (solar power, batteries, inverters)

    Fast and accurate response based on C curve

    Easy installation on DIN rail

    Applications:

    Solar power plants (PV systems)

    DC distribution boards

    Charging stations

    Battery systems

    Industrial DC automation

    Telecommunications power systems

    Pros:

    High breaking capacity – up to 10 kA

    Reliable operation even in high humidity environments

    Easy installation and maintenance

    Cons:

    Designed only for DC voltage – not suitable for AC networks

    Limited electrical endurance (1,000 cycles) – not for frequent switching 

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.
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