Products catalog

Home/Product Catalog/Solar Energy Generation and Management Equipment/Protective DC automatic circuit breakers for solar modules
  •   Modular protective DC circuit breaker for solar modules 2P | 32A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS
      Modular protective DC circuit breaker for solar modules 2P | 32A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS 1
      Modular protective DC circuit breaker for solar modules 2P | 32A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS 2
      Modular protective DC circuit breaker for solar modules 2P | 32A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS 3

    Modular protective DC circuit breaker for solar modules 2P | 32A | 500VDC | C | 10kA | DIN | MCB-DC | HSA3-DC VECAS

    Code: HSA3-DC-232500
    Inquire about this item
    Price 19.80 € VAT incl.
    ( 16.36 € VAT excl. )
    Want another price? Suggest yours!
    Modular DC miniature circuit breaker designed for the protection of DC electrical circuits against overloads and short circuits. This is a 2-pole, 32A, 500VDC circuit breaker with a C tripping characteristic, a 10kA breaking capacity, and DIN rail mounting. The device is suitable for the protection of solar modules, PV systems, batteries, inverters, DC distribution boards, and other DC voltage circuits. 
  • Product description

    Modular DC miniature circuit breaker – 2P, 32A, 500VDC, C-curve, 10kA, DIN

    Modular DC miniature circuit breaker designed for the protection of DC electrical circuits against overloads and short circuits. This is a 2-pole, 32A, 500VDC circuit breaker featuring a C-type tripping characteristic, 10kA breaking capacity, and DIN rail mounting. The device is suitable for protecting solar modules, PV systems, batteries, inverters, DC distribution boards, and other DC voltage circuits.

    Main idea:
    This circuit breaker is designed for DC (direct current) circuits where protection against overloads and short circuits is essential. It is particularly relevant for solar power plants, DC distribution boards, battery systems, and inverter circuits, where standard AC circuit breakers are not suitable.
    Poles
    2P
    Current
    32A
    Voltage
    500V DC
    Breaking capacity
    10kA

    Operating principle

    The DC circuit breaker monitors the circuit current and automatically disconnects the circuit in the event of an overload or short circuit. The thermal release mechanism responds to long-term overloads, while the magnetic release mechanism reacts to sudden current spikes during a short circuit.

    The C-curve characteristic indicates that the breaker is suitable for circuits with higher inrush currents. This characteristic is important in DC systems using inverters, power supplies, batteries, controllers, or other equipment that may create a higher starting current momentarily.

    Why do DC circuits require a specialized circuit breaker?
    In DC circuits, the electrical arc is more difficult to extinguish than in AC circuits; therefore, breakers specifically adapted for DC voltage must be used in DC systems. This model is intended for 500V DC circuits and should not be used in AC networks unless otherwise specified by the manufacturer.

    Technical parameters

    Product type Modular DC miniature circuit breaker
    Manufacturer VECAS
    Model HSA3-DC-232500
    Series / type MCB-DC
    Number of poles 2P
    Rated current (In) 32A
    Rated voltage (Ue) 500V DC
    Rated insulation voltage (Ui) 500V DC
    Rated impulse withstand voltage (Uimp) 4kV
    Ultimate breaking capacity (Icn) 10kA
    Service breaking capacity (Ics) 75% Icn
    Tripping characteristic C-curve, 1–15 In
    Tripping mechanism Thermal and magnetic
    Mechanical endurance 10,000 cycles
    Electrical endurance 1,000 cycles
    Wire connection cross-section In ≤ 32A: 1–25 mm²; In ≥ 40A: 10–25 mm²
    Mounting DIN rail
    Operating temperature -20°C to +70°C
    Operating altitude ≤ 2000 m
    Relative humidity ≤ 90%
    Pollution degree 2
    Environment Free from severe vibrations or shocks
    Dimensions 36x81x75 mm
    Weight 0.21 kg

    Where is it used?

    • In solar power plants and PV systems – for protecting DC circuits against overloads and short circuits.
    • In DC distribution boards – for disconnecting and protecting DC voltage circuits.
    • In battery systems – for protecting batteries and DC power circuits according to the appropriate diagram.
    • In inverter circuits – for protecting the DC side, when parameters match the equipment requirements.
    • In charging stations – for protecting DC circuits if technical parameters are matched.
    • In telecommunications power systems – for DC voltage supply lines.
    • In industrial DC automation – for protecting control and power circuits.

    Practical installation example

    For example, the circuit breaker is installed in a DC distribution board on a DIN rail between the solar panel array and the inverter's DC input. This way, it can disconnect the circuit in case of an overload or short circuit, providing an additional layer of protection during system maintenance.

    The breaker can also be used in battery, telecommunication, or industrial automation DC systems, provided that voltage, current, polarity, breaking capacity, and cable cross-sections match the specific system project.

    Pros

    • Designed for DC systems – adapted for DC voltage circuits up to 500V DC.
    • 2P design – allows for disconnecting two DC lines according to the circuit diagram.
    • 32A rated current – suitable for many small and medium DC circuits if matched with the project.
    • 10kA breaking capacity – higher level of safety for short-circuit events.
    • Thermal and magnetic tripping – protection against both overload and short circuit.
    • C-curve – suitable for circuits with higher starting currents.
    • DIN mounting – easily installed in standard electrical cabinets.
    • Operating temperature up to +70°C – suitable for more challenging technical environments, adhering to mounting conditions.

    Cons / limitations

    • For DC voltage only – not suitable for AC networks unless otherwise specified by the manufacturer.
    • Limited electrical endurance – 1,000 electrical cycles; not suitable for frequent switching as a control switch.
    • Correct polarity required – in DC systems, the manufacturer's specified wiring direction and polarity must be followed.
    • 500V DC limit – not suitable for systems where DC voltage exceeds this value.
    • Must be selected based on short-circuit calculations – 10kA capacity must be sufficient for the specific system.
    • Not for severe vibrations – intended for use in environments without severe vibrations or shocks.

    Safety and installation notes

    The DC circuit breaker is a protective device; its selection and installation must be performed according to the specific system voltage, current, short-circuit current, cable cross-sections, polarity, and manufacturer instructions.

    • Installation must be performed by a qualified electrician or solar system installation specialist.
    • For use in DC circuits only unless the manufacturer specifies suitability for AC networks.
    • Do not exceed 500V DC and 32A rated parameters.
    • Polarity and wiring direction must be respected, as DC circuit breakers may have a specific current flow direction.
    • Breaking capacity must match the system – 10kA must be sufficient for the specific short-circuit current.
    • Wire cross-section must be selected based on load and match the terminal capabilities of the breaker.
    • Do not use as a frequently toggled control switch – electrical endurance is limited to 1,000 cycles.

    Quick selection guide

    VECAS HSA3-DC-232500 – a suitable choice when you need a 2P circuit breaker for a DC circuit up to 500V DC and 32A, for example, for solar modules, inverters, batteries, or DC distribution board protection. The breaker is mounted on a DIN rail and has a 10kA breaking capacity.

    Poles
    2P
    Current
    32A
    Voltage
    500V DC
    Capacity
    10kA
    Suitable when you need to:
    • protect a DC circuit against overload and short circuits;
    • use a breaker on the DC side of a solar power plant;
    • mount a protective device on a DIN rail;
    • use a 2P solution up to 500V DC;
    • have 10kA breaking capacity in a DC system.
    Check before installation:
    • whether the system voltage exceeds 500V DC;
    • whether the 32A rated current fits the specific circuit;
    • whether 10kA breaking capacity is sufficient for the system's short-circuit current;
    • whether the C-curve is appropriate for the load type;
    • whether cable cross-sections match terminal and load requirements;
    • whether DC polarity and wiring direction are respected.
    Important reminder:
    This circuit breaker is designed for DC (direct current) circuits. It must not be installed as a standard AC circuit breaker unless the manufacturer specifies suitability for AC networks. In DC systems, adherence to polarity, wiring direction, and project requirements is mandatory.

    FAQ – Frequently asked questions

    What is this DC circuit breaker for?
    It is designed for protecting DC circuits against overload and short circuits, particularly in solar power plants, battery systems, and DC distribution boards.
    Is this breaker suitable for solar modules?
    Yes, it can be used in the DC circuits of solar modules and PV systems, provided that the voltage, current, and breaking capacity match the specific system.
    Can it be used in an AC network?
    No, this model is intended for DC voltage. For AC networks, you must use circuit breakers adapted for AC circuits unless otherwise specified by the manufacturer.
    What is the rated voltage?
    The rated operating voltage is 500V DC.
    What is the rated current?
    The rated current is 32A.
    What does C-curve mean?
    The C-curve refers to the tripping characteristic suitable for circuits with higher temporary inrush currents. The final selection depends on the load and system design.
    Can it be used as a frequently toggled ON/OFF switch?
    It is not recommended to use it as a frequently toggled control switch, as the electrical endurance is limited to 1,000 cycles.
    Where is this breaker mounted?
    The breaker is mounted on a standard DIN rail in an electrical distribution board or a DC distribution box.

    Reliable DC circuit protection for solar and battery systems

    The 2P 32A 500VDC miniature circuit breaker helps protect DC circuits against overload and short circuits in solar power plants, DC boards, inverter systems, and battery storage.

    With a 10kA breaking capacity, C-curve, thermal-magnetic tripping mechanism, and DIN rail mounting, this MCB-DC breaker is a practical choice for professional 500V DC protection circuits.

    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.

  • Alternative products

    Rear L-type panel bracket for solar modules | 30mm | Goomax End clamp (BLK) Rear L-type panel bracket for solar modules | 30mm | Goomax End clamp (BLK) Top seller  
    Rear L-type panel bracket for solar modules | 30mm | Goomax End clamp (BLK)
    Code: GM-EC-30H
    Price 2.29 € VAT incl.
    ( 1.89 € VAT excl. )
    Add to cart 
    Cable for solar modules | 1x4mm² | black | H1Z2Z2K | Dca | SOLAR IEMMEQU HAR  
    Cable for solar modules | 1x4mm² | black | H1Z2Z2K | Dca | SOLAR IEMMEQU HAR
    Code: H1Z2Z2K
    Price 0.98 € VAT incl.
    ( 0.81 € VAT excl. )
    Add to cart 

  • Subscribtion to new arrivals

    privacy policy

    Information