Fastronix Solutions 300A Battery Disconnect Switch 1/2" Copper Stud — Severe-duty with Face Plate, 12V Continuous Isolation

Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch with face plate is a heavy-duty master battery switch engineered for reliable 300A continuous service and quick isolation of 12V systems.

Built for demanding electrical setups, this disconnect combines a robust 1/2" copper main stud rated to 300A continuous (and 2000A intermittent) with an index-pin that prevents rotation after installation. It accepts single- or dual-pole wiring, offers auxiliary studs for indicator lights or small accessories, and installs neatly with an included face plate. The switch is compatible with Fastronix 404-116 terminal covers for a finished, professional appearance.

How durable is this switch for high-current 12V systems?

The Fastronix 300A switch uses 1/2" copper main studs designed for continuous 300A at 12VDC and can tolerate 2000A intermittently, making it suitable for heavy loads and starter battery isolation. The severe-duty construction resists wear in harsh environments and the indexed mounting prevents terminal rotation under vibration.

• 1/2" copper main studs rated 300A continuous at 12VDC
• 2000A intermittent current capacity for short bursts
• Index pin locks orientation to stop post-connection rotation
• Severe-duty materials for rugged and mobile applications

Can I use it for single-pole and dual-pole applications?

Yes — the design supports installation as either a single-pole master cutoff or a dual-pole switch depending on wiring needs. That flexibility lets you isolate one battery or both sides of a circuit without changing the core hardware.

• Configurable single- or dual-pole wiring
• Same main studs handle both configurations for fewer parts
• Maintains rated amperage in either wiring setup
• Face plate simplifies panel mounting and appearance

What auxiliary connections and accessories are supported?

The switch includes smaller auxiliary studs rated to 20A at 12VDC for indicator lamps, ignition interlocks, or small accessory circuits. For a polished installation, pair the unit with Fastronix 404-116 terminal covers to protect connections and tidy the terminal area.

• Auxiliary studs rated 20A@12VDC for lights or small devices
• Compatible with Fastronix 404-116 terminal covers for safety
• Face plate keeps wiring accessible but neat
• Ideal for indicator or control circuits tied to the main cutoff

How does the face plate and mounting design help installation?

The included face plate provides a finished look and straightforward panel mounting, while the index pin ensures the switch stays aligned once tightened. Together these features reduce installation time and minimize the chance of loose or rotated connections in mobile and fixed installations.

• Face plate offers clean panel integration and mounting stability
• Index pin prevents post-installation rotation of the switch body
• Works with optional terminal covers for added protection
• Designed for quick retrofit or new-panel installations

Who is this for: technicians, fleet managers, boat owners, RV builders, and anyone who needs a dependable heavy-duty battery isolation switch for 12V systems. If you require a rugged, high-current disconnect with a neat panel finish and the option to add indicator circuits, the Fastronix 300A 1/2" Severe Duty Battery Disconnect Switch delivers the capacity, flexibility, and installation-friendly features professional installs demand.