Fastronix Solutions Battery Disconnect Switch 3/8" 2‑Post SPST — 180A Continuous, 1000A Peak

This compact, high-current switch gives you a simple, reliable way to disconnect the main battery line. Built for applications where large currents are expected — from race cars and boats to RVs and industrial equipment — the unit accepts 3/8" studs and delivers a rated 180 amps continuous with short-term capability up to 1000 amps. Its single-pole single-throw (SPST) design breaks the positive feed to the entire electrical system, and it can be panel-mounted in a 3/4" hole or surface-mounted with an optional bracket.

How does this switch handle high currents safely?

The switch is engineered to carry sustained loads up to 180A and withstand intermittent surges up to 1000A, making it suited for systems that see heavy starting or peak events. Robust contact hardware and sizeable studs reduce resistance and heat buildup during operation.

• 180A continuous rating for regular operation
• 1000A intermittent capability for brief high-current events
• 3/8" copper/steel studs to minimize voltage drop
• Durable construction for repeated open/close cycles

Where and how can I mount the Fastronix battery disconnect?

By default the switch fits into a 3/4" panel hole for quick dash or firewall installation. If you need a surface mount, use the Fastronix 980-000 switch mount to install the unit on nearly any flat surface using two 1/4" fasteners.

• 3/4" hole for standard panel-mounted installs
• Optional 980-000 mount for surface mounting on any substrate
• Two 1/4" fasteners secure the mount to bulkheads or brackets
• Compact footprint for tight spaces like engine bays or consoles

What protection and safety features are included?

The switch provides a single-point power cutoff to isolate the entire electrical system quickly. For added protection of the exposed studs, Fastronix 404-110 terminal covers are available to reduce the risk of accidental shorting and to help keep corrosion and debris away from the connections.

• Single power-disconnect for whole-system isolation
• Compatible with Fastronix 404-110 terminal covers for stud protection
• Clean break design reduces parasitic drain when open
• Simple manual operation with clear open/closed positions

Why do racers and RV owners choose this type of disconnect?

This switch meets common competition requirements when a battery is relocated and is also popular for RV owners who want to prevent battery drain during storage. Its combination of high amperage capacity, small size, and adaptability makes it a practical safety and maintenance tool for mobile and stationary electrical systems.

• Acceptable for NHRA competition when battery position rules apply
• Useful as a storage disconnect to stop parasitic loads in RVs
• Suits marine, automotive, and industrial battery systems
• Easy to operate and service in the field or garage

Who is this for: Technicians, hobbyists, and vehicle owners who need a compact, high-current manual cutoff will find this Fastronix switch suitable. It’s targeted at people installing or relocating batteries in racecars, boats, RVs, and utility vehicles, plus anyone wanting a reliable way to electrically isolate a system for maintenance, transport, or long-term storage.