The CHCYZO 100A DC Circuit Breaker MCB 1P is a high-current DC protection device designed for LiFePO4 battery packs, solar power systems, inverters, EV battery systems and DC distribution applications. BDTronics offers this 100A DC MCB for battery protection and manual power isolation, providing a practical way to disconnect high-current DC circuits during maintenance, troubleshooting or emergency situations.

BDTronics 100A DC circuit breaker is rated for up to 100A and 125V DC and combines circuit protection with a convenient mechanical On/Off switch. Its single-pole DIN-rail design is suitable for battery protection panels, solar DC distribution boxes, inverter installations, energy storage systems and other high-current DC applications.

Features:

• CHCYZO 100A DC circuit breaker

• 1-pole / 1P configuration

• Rated current: 100A

• Rated working voltage: 125V DC

• Suitable for LiFePO4 battery systems

• Suitable for high-current DC battery applications

• Provides overload protection

• Provides short-circuit protection

• Functions as a manual DC On/Off isolation switch

• Type B tripping characteristic

• Type B trip range: approximately 3–5 × rated current

• DIN rail mounting design

• Compact single-pole construction

• Suitable for battery banks and DC busbars

• Suitable for solar DC systems

• Suitable for inverter battery protection

• Suitable for EV and battery-powered applications

• Suitable for DC distribution panels

• Mechanical life of more than 10,000 operations

• Electrical life of more than 4,000 operations

• Designed for high-current DC circuit protection

• Useful for battery maintenance and emergency isolation

• Suitable for compact electrical enclosures

Specifications:

• Product Name: RKB1/DC Special Circuit Breaker

• Product Type: DC Circuit Breaker / DC MCB

• Brand: CHCYZO

• Pole Number: 1P

• Rated Current: 100A

• Rated Working Voltage: 125V DC

• Tripping Characteristic: Type B

• Type B Trip Characteristic: Approximately 3–5 × In

• Application: DC systems, EVs, battery systems, solar systems and related applications

• Mounting Type: Standard DIN Rail

• Electrical Life: ≥4,000 operations

• Mechanical Life: ≥10,000 operations

• Ambient Temperature: Approximately -5°C to +40°C

• Certifications: CE / RoHS, if applicable

• Switching Function: Manual On/Off

• Protection Type: DC overload and short-circuit protection

• Configuration: Single Pole

LiFePO4 Battery Protection:

• Suitable for 12V, 24V, 36V, 48V and other DC battery systems when voltage and current remain within breaker ratings.

• Can be installed between a LiFePO4 battery pack and inverter.

• Can be used between a battery and DC load distribution system.

• Provides a convenient manual isolation point for battery maintenance.

• Useful for battery packs with high continuous discharge current.

• Can be installed inside a battery distribution or protection enclosure.

• For lithium battery systems, breaker selection should consider maximum battery current, inverter surge current and available short-circuit current.

Solar Power System Applications:

• Suitable for solar battery banks and DC distribution systems.

• Can be used between a battery bank and inverter.

• Suitable for DC input/output protection in battery-based solar systems.

• Useful in solar charge controller and energy storage installations where the breaker specifications match the circuit.

• Provides a convenient manual disconnect for maintenance.

Inverter Battery Protection:

A 100A DC breaker can be used as a battery-side disconnect for compatible DC inverters. For example, in a 48V LiFePO4 inverter system, it can provide a convenient high-current isolation point between the battery and inverter while also providing circuit protection within its specified operating limits.

• Battery-to-inverter isolation

• DC distribution protection

• Manual battery disconnect

• Inverter maintenance isolation

• High-current battery circuit protection

Actual breaker suitability should be determined from inverter continuous current, surge current, battery short-circuit capability and the breaker's specified DC interrupting capability.

On/Off Isolation Switch:

• The breaker lever allows manual switching of the connected DC circuit.

• Useful for disconnecting batteries during maintenance.

• Can provide a dedicated battery isolation point inside an electrical panel.

• Helps simplify troubleshooting and system shutdown.

• Do not use the breaker as a routine load-switching device unless its switching and electrical ratings are suitable for the specific application.

Type B Tripping Characteristic:

• Type B characteristic is intended for circuits where moderate startup or inrush currents are expected.

• Trip range is approximately 3–5 times rated current according to the supplied specification.

• For a 100A breaker, this corresponds approximately to 300–500A for the specified instantaneous trip region.

• Actual DC tripping behavior depends on the breaker design and operating conditions.

• Check the manufacturer's detailed trip curve when precise protection coordination is required.

DIN Rail Installation:

• Designed for installation on a standard DIN rail.

• Suitable for electrical distribution boxes and battery protection panels.

• Compact 1P design helps conserve enclosure space.

• Can be combined with other DIN-rail protection and distribution components.

• Suitable for custom solar, inverter and energy storage panels.

How to Use:

• Turn off the complete electrical system before installation.

• Select a suitable enclosure and DIN rail.

• Mount the breaker securely on the DIN rail.

• Connect the DC source, such as a battery, to the appropriate input terminal.

• Connect the output terminal toward the inverter, load or DC distribution circuit.

• Observe the correct DC polarity and manufacturer's terminal markings.

• Use appropriately sized cable, terminals and busbars for a 100A circuit.

• Tighten terminals according to the appropriate manufacturer's torque specification.

• Inspect all connections before energizing the system.

• Turn the breaker ON after confirming that wiring and polarity are correct.

• Turn the breaker OFF before performing maintenance or disconnecting downstream equipment.

Installation Guidelines:

• Use cable with a continuous current rating appropriate for the actual circuit current.

• For 100A battery circuits, cable size must be selected based on conductor material, length, temperature, installation method and allowable voltage drop.

• Keep high-current connections short where practical.

• Use properly rated lugs and terminals.

• Ensure all connections are mechanically secure.

• Provide adequate ventilation inside an electrical enclosure.

• Avoid loose terminals because high resistance connections can generate substantial heat.

• Inspect high-current terminals periodically for signs of heating or discoloration.

Important Safety Information:

• This is a high-current DC protection device.

• DC arcs can be difficult to extinguish, particularly at high voltage and high available fault current.

• Do not assume a 125V DC rating alone means the breaker is suitable for every 125V battery system.

• Verify the manufacturer's DC breaking capacity and trip curve for the intended installation.

• Do not exceed the specified 100A continuous current rating.

• Do not exceed the specified 125V DC working voltage.

• Verify the breaker is suitable for the battery's maximum prospective short-circuit current.

• Disconnect all power before installation or wiring changes.

• Use appropriate electrical protection and enclosure design for lithium battery systems.

Applications:

• LiFePO4 battery protection

• Lithium battery protection

• 12V battery systems

• 24V battery systems

• 36V battery systems

• 48V battery systems

• Solar power systems

• Solar battery banks

• Off-grid inverter systems

• DC inverter protection

• Energy storage systems

• Battery energy storage

• EV battery systems

• Electric vehicle electrical systems

• Battery-powered equipment

• DC distribution panels

• DC busbar protection

• Battery protection boxes

• Solar distribution boxes

• High-current DC circuits

• Industrial DC systems

• DIY battery packs

Package Information:

• Product: CHCYZO RKB1/DC 100A DC Circuit Breaker

• Configuration: 1P

• Quantity: 1 × DC circuit breaker

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