DIHOOL 300A Battery Disconnect Switch for DC Systems — 300 Amp Thermal-Magnetic Breaker, Front-Access Compact

DIHOOL Heavy Duty Battery Disconnect Switch is a 300 amp DC-rated thermal-magnetic circuit breaker that isolates and protects batteries and DC systems in solar, UPS, and power-station setups.

This compact 300A battery disconnect provides overload and short-circuit protection in a robust housing sized 73mm x 163mm x 86mm. It works across DC systems, with thermal-magnetic trip behavior: models for lower-voltage systems (12–30V) provide overload and isolation, while higher-voltage variants (32–400V) add short-circuit protection. The front-access design simplifies panel mounting and maintenance in confined electrical compartments.

How does this DIHOOL switch protect my DC system?

The device uses a thermal-magnetic trip mechanism that combines temperature-sensitive overload protection with fast magnetic response for larger faults. That dual action helps clear sustained overloads and rapid short circuits while allowing normal currents to pass. It also functions as an isolation switch for safe maintenance and system changes.

• Thermal trip for sustained overloads
• Magnetic trip for high-current short events (with 32–400V models)
• Manual disconnect capability for safe servicing
• Rated continuous current: 300 A

Can I install the DIHOOL 300A breaker in solar or battery bank systems?

Yes — the breaker is designed for DC applications such as photovoltaic arrays, battery banks, UPS, and datacenter backup systems. Its size and front-access mounting make it suitable for compartmented panels and power stations where space and accessibility matter. Verify your system voltage because short-circuit protection differs by voltage range.

• Compatible with 12–30V systems (overload/isolation)
• Models for 32–400V include short-circuit protection
• Front-access installation for tight enclosures
• Suitable for photovoltaic, UPS, battery, and datacenter use

What are the physical and installation details I should know?

The breaker is compact (73mm x 163mm x 86mm) and intended for straightforward front-panel mounting so technicians can reach terminals and controls without opening the entire cabinet. Terminals are sized to accept substantial DC cabling appropriate for 300A continuous current. Follow wiring best practices and torque specs for safe, reliable connections.

• Overall dimensions: 73 × 163 × 86 mm
• Front-access face for easier maintenance
• Terminals sized for heavy-gauge DC cable and lug attachments
• Mounting options compatible with electrical compartments and panels

How should I match voltage and model to my application?

Choose the version that matches your system voltage: the 12–30V variant offers thermal-magnetic overload and isolation, while the 32–400V version adds magnetic short-circuit protection appropriate for higher-voltage DC systems. Check your system’s maximum operating voltage and prospective fault currents before selecting and installing the breaker. When in doubt, consult your system designer or a licensed electrician for proper coordination and protective settings.

• 12–30V: overload protection and isolation
• 32–400V: overload plus short-circuit protection
• Confirm system maximum voltage and prospective fault current
• Coordinate protection with upstream/downstream devices

Who is this for: The DIHOOL 300A Heavy Duty Battery Disconnect Switch is aimed at installers, system integrators, and facility engineers building solar arrays, battery backup racks, UPS systems, or datacenter power infrastructure that require a compact, front-access DC circuit breaker capable of isolating and protecting high-current DC circuits. It is best suited for applications needing a rugged 300A protection device with clear voltage-range options and easy service access.