SunGold Power 300 Amp DC Breaker
The SunGold Power 300 Amp DC Breaker (SG-C300A) provides circuit protection and manual power isolation for high-current battery and energy storage systems. Designed to protect DC circuits against overloads and short circuits, it serves as a disconnect between compatible batteries, inverters, and other DC equipment. Its 300A rating and molded-case construction suit larger battery banks, solar energy storage installations, and backup power systems.
SunGold Power 300 Amp DC Breaker Features
300A Rated Current - Designed for high-current battery banks and inverter circuits that require a properly sized 300A protective device.
Overload and Short-Circuit Protection - A thermal-magnetic trip mechanism helps protect connected equipment and wiring from excessive current and short-circuit faults.
Manual DC Disconnect - The clearly marked ON/OFF handle provides a convenient way to isolate battery or inverter circuits for maintenance and servicing.
Two-Pole DC Design - Features a 2P configuration with a rated operating voltage range of 12–500V DC, subject to the manufacturer’s installation requirements.
Durable Molded-Case Construction - Molded-case construction supports dependable protection in solar energy storage, off-grid, and backup power applications.
Push-to-Trip Button - A front-mounted red test button allows manual activation of the breaker’s tripping mechanism.
SunGold Power 300 Amp DC Breaker Applications
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Battery Bank Protection — Provides overcurrent protection and manual isolation for compatible high-current battery circuits.
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Battery-to-Inverter Connections — Serves as a protective disconnect between a battery bank and a compatible inverter.
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Solar Energy Storage Systems — Protects appropriately rated DC circuits on the battery storage side of a solar installation.
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Off-Grid Power Systems — Supports circuit protection and maintenance isolation in independent battery-powered installations.
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Backup Power Systems — Provides a disconnect point for compatible battery and inverter circuits used during power outages.
What’s Included?
SunGold Power 300 Amp DC Breaker Specifications
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Specification
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Details
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Rated Current
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300A
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Poles
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2P
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Rated Voltage Ue
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DC12V~500V
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Insulation Voltage Ui
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1000V
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Rated Impulse Withstand Voltage(1.2/50)Uimp
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6k
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VRated Breaking Capacity(Ics)
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20kA
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Rated operating short-circuit breaking capacity Icu(kA):
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25kA
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Thermo-Magnetic Release Characteristic
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Curve (4-6In)
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Electrical Life
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1000 Cycles
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Mechanical Life
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2000 Cycles
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Installation
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Panel Screw Installation
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Ambient Temperature
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23°F to +158°F(-5°C~ +70°C)
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Terminal Connection Type
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Hexagon Screw
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Tightening Torque
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5.0N.mInternational
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Standard
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IEC/EN60947-2Arcing
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Distance
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≤50MM
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Use Category
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A
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SG-C300A(HxLxW)
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6.46 x 2.95 x 3.35 inches
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Frequently-Asked Questions
What does the SunGold Power 300 Amp DC Breaker do?
It provides overload protection, short-circuit protection, and manual circuit isolation for compatible DC battery and energy storage circuits.
Can this breaker support battery charging and discharging?
Yes. The manual describes bidirectional current operation, but the ultimate short-circuit breaking capacity depends on current direction. It specifies 25kA for the forward-current configuration and 15kA under reverse-current conditions. System selection must account for these limits.
How must the breaker be mounted?
The breaker must be installed upright on a vertical surface, with the arc chamber at the top. The manual prohibits horizontal and upside-down mounting. Installation must follow the manufacturer’s instructions and be performed by qualified personnel.
Where should the battery and inverter be connected?
The recommended arrangement connects the battery or DC power source to the upper LINE terminals and the inverter or other load to the lower LOAD terminals. Follow the manual’s wiring diagrams and breaking-capacity requirements.
Does the 300A rating apply at every temperature?
No. The manual provides temperature correction factors that affect usable current capacity. Breaker selection must account for ambient temperature, cable sizing, equipment requirements, and installation conditions.
Manual
