Products catalog

Home/Product Catalog/Solar Energy Generation and Management Equipment/Protective DC automatic circuit breakers for solar modules
  • New item   Modular DC circuit breaker for solar modules | 2P | 32 A | 1000 V DC | DIN | TAIXI E2P-DC1000V-32A

    Modular DC circuit breaker for solar modules | 2P | 32 A | 1000 V DC | DIN | TAIXI E2P-DC1000V-32A

    Code: E2P-DC1000V-32A
    Inquire about this item
    Price 25.80 € VAT incl.
    ( 21.32 € VAT excl. )
    Want another price? Suggest yours!

    E2P-DC1000V-32A is a double-pole modular DC circuit breaker, 32 A, 1000 V DC, DIN-rail mounted. Designed for DC-side protection of solar (PV) power plants – connected between the solar module string and the inverter or string combiner box, protecting conductors and equipment from overload and short circuit.

  • Product description

    Modular DC circuit breaker for solar modules | 2P | 32 A | 1000 V DC | DIN | TAIXI E2P-DC1000V-32A

    E2P-DC1000V-32A is a double-pole modular DC circuit breaker, 32 A, 1000 V DC, DIN-rail mounted. Designed for DC-side protection of solar (PV) power plants – connected between the solar module string and the inverter or string combiner box, protecting conductors and equipment from overload and short circuit.

    Main point:
    PV string voltage during summer daylight hours constantly approaches the system maximum, and in the event of a short circuit or insulation fault, a DC arc at close to 1000 V does not extinguish by itself, unlike an AC arc. A standard AC breaker cannot safely interrupt such a circuit. E2P-DC1000V-32A is a double-pole device that disconnects both string conductors (+ and –) simultaneously and is designed to extinguish a DC arc up to 1000 V DC, so it serves as both the primary protection for a single PV string and a manual disconnector.
    Rated current
    32 A
    Rated voltage
    1000 V DC
    Poles
    2P
    Mounting
    DIN rail

    Operating principle

    The breaker is connected into the PV string circuit between the solar modules and the inverter or string combiner box, mounted on a standard DIN rail in the panel. Because the device is double-pole, both string conductors – positive and negative – pass through it, and the on/off handle controls both poles simultaneously, ensuring full circuit isolation when servicing the system.

    A DC arc, unlike an AC arc, does not extinguish by itself at the zero crossing, so extinguishing it requires a longer path and suitable construction. The double-pole design splits the arc into two series-connected breaking points, making it possible to safely interrupt a higher voltage (up to 1000 V DC) than a single pole would allow. For this reason, it is important to follow the manufacturer's specified connection direction when installing.

    What makes E2P-DC1000V-32A useful?
    It performs two functions in one housing – automatic protection against overload and short circuit, and a manual DC disconnector. In one motion the entire PV string can be safely isolated for technical inspection or inverter servicing, and in a fault event the device trips independently, without extra control or power supply.

    Technical specifications

    Model E2P-DC1000V-32A
    Product type DC circuit breaker (DC MCB) for solar modules
    Number of poles 2P
    Rated current In 32 A
    Rated voltage Ue 1000 V DC
    Mounting DIN rail
    Purpose Protection of solar (PV) DC circuits
    Category DC protective circuit breakers for solar modules

    Key features

    • Overload protection – the device disconnects the circuit when the current exceeds 32 A for an extended period.
    • Short-circuit protection – fast disconnection on a sudden current surge in the string.
    • DC arc extinguishing – construction designed for a DC arc up to 1000 V DC, not an adapted AC device.
    • Double-pole disconnection – both string conductors (+ and –) are isolated in a single action.
    • DIN mounting – fits into a standard PV or distribution panel without a separate enclosure.
    • Manual disconnector – safe string disconnection when servicing the inverter or string combiner box.

    Where is it used?

    • DC side of residential solar power plants between the module string and the inverter
    • String combiner boxes with multiple PV strings
    • DC generator junction boxes in solar power plants
    • DC distribution panels of commercial and industrial solar power plants
    • PV inputs of hybrid and off-grid solar systems
    • Technical room panels concentrating DC switching for several strings
    • Protection and disconnection of the inverter's DC input for servicing

    Use by need

    For home users.
    If you are installing a residential solar power plant with one or several PV strings, this breaker is the primary DC protection between the modules and the inverter, without which operating the system is not recommended.
    For businesses and industry.
    In commercial solar power plants with several string combiner boxes, one E2P-DC1000V-32A is installed per string, allowing a single string to be isolated for technical maintenance without shutting down the whole system.
    For electricians / engineers.
    When selecting, check three things: the string's short-circuit current Isc with a safety margin does not exceed 32 A, the system's maximum DC voltage does not exceed 1000 V, and the conductor cross-section matches the 32 A rating. Choose the connection polarity according to the device manufacturer's instructions.

    Practical application

    If a string combiner box connects several PV strings, each with a short-circuit current Isc of about 11 A, an E2P-DC1000V-32A is installed individually for each string – the 32 A rating provides sufficient margin above Isc even under increased irradiance. If a module fails or insulation damage occurs in a string, the breaker disconnects only that string, while the remaining strings continue supplying energy to the inverter.

    Pros

    • A genuine DC device – designed for a DC arc up to 1000 V DC, not a converted AC breaker.
    • Full double-pole disconnection – both string conductors isolated in a single action.
    • Compact DIN solution – replaces a separate DC switch and fuse block.
    • Dual purpose – protection and manual disconnector in one housing.
    • Resettable – switched back on after tripping, no fuse to replace.
    • Suits most PV strings – 32 A rating matches the Isc of standard module strings.

    Cons / limitations

    • Only 32 A – higher-current strings or combined circuits need a higher-rated model.
    • Polarised double-pole device – the connection direction must match the manufacturer's instructions for the arc to be safely extinguished.
    • An official TAIXI datasheet for this specific model could not be found publicly, so breaking capacity (kA) and operating temperature are not stated in this description – before installing in a system with high Isc current, it is recommended to confirm these figures with the supplier.
    • The device does not protect against overvoltage – a separate surge arrester is needed for that.
    • No residual-current (RCD) function – if required for the project, a separate device is used.

    Safety and installation notes

    • Follow the connection direction and polarity marked on the device body – this determines safe arc extinguishing.
    • PV modules generate voltage even under low irradiance, so before installation follow safe working procedures for solar power plants, not those for an AC circuit disconnected from the mains.
    • Use DC conductors and appropriate terminals matching the 32 A rating cross-section.
    • Install as close as possible to the start of the string or the string combiner box input, so the unprotected cable section is as short as possible.
    • Leave enough space around the device in the panel for cooling, per the panel design.
    • After installation and the first load, check the terminal connections.

    Quick selection guide

    Rated current
    32 A
    Rated voltage
    1000 V DC
    Poles
    2P
    Mounting
    DIN rail
    Suitable when you need to:
    • protect and disconnect a PV string with current up to 32 A and voltage up to 1000 V DC;
    • disconnect both string conductors (+ and –) in a single action;
    • a modular DIN solution for a string combiner box or PV panel.
    Check before use:
    • whether the string's short-circuit current Isc with a safety margin does not exceed 32 A;
    • whether the system's maximum DC voltage does not exceed 1000 V;
    • whether the manufacturer's specified connection direction is followed;
    • whether the conductor cross-section matches the 32 A rating.
    Important reminder:
    The breaker protects conductors and equipment against overload and short circuit – it does not protect against overvoltage and does not replace residual-current (RCD) protection, if required for the system.

    FAQ

    Is it suitable for a system with a voltage above 1000 V DC?
    No – the rated voltage is 1000 V DC; a different device is needed for higher voltage.
    Does it disconnect both string conductors at the same time?
    Yes, it is a double-pole (2P) device – the on/off handle controls both poles together.
    What maximum string current is it suitable for?
    Rated current – 32 A; when selecting, assess the string's Isc with a safety margin.
    Can it be used in an alternating current (AC) circuit?
    No, the device is designed only for direct current.
    Does the way the wires are connected matter?
    Yes – the connection direction must follow the manufacturer's instructions so the DC arc is safely extinguished.
    Does it replace the DC switch inside the inverter?
    It is usually used as an additional, separate string protection and disconnector ahead of the inverter, not as a replacement for the inverter's internal switch.

    Modular DC circuit breaker for solar modules | 2P

    E2P-DC1000V-32A is a double-pole modular DC circuit breaker, 32 A, 1000 V DC, DIN mounted, designed for protecting and manually disconnecting solar module strings. Used between PV modules and the inverter or string combiner box in residential, commercial and industrial solar power plants.

    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 
  • privacy policy

    Information