Fastronix Solutions 3/8" 2-Post SPST Battery Disconnect Switch — 180A/1000A NHRA-Compliant Flush-Mount

The Fastronix 3/8" 2-post SPST battery disconnect switch instantly isolates an entire vehicle or boat electrical system and is rated 180A continuous and 1000A intermittent for high-current applications.

Built for motorsport, marine and recreational power systems, this rugged rotary-style switch gives a single, reliable point to cut battery feed to the whole electrical network. Compact enough to fit in a 3/4" mounting hole yet adaptable to surface mounting with Fastronix's optional 980-000 bracket, the device balances heavy-duty performance with simple installation and routine safety use.

How does this switch protect my vehicle or boat when the battery is relocated?

The Fastronix disconnect meets NHRA requirements for battery relocation by providing a clearly accessible master cutoff. Turning the switch interrupts battery power to prevent unintended starts, reduce fire risk from wiring faults, and comply with competition safety standards.

• Single-point system shutoff for complete electrical isolation
• NHRA-compliant when battery position changes
• Durable metal studs and robust internal contacts for reliable breaks

What current loads and duty cycles can this switch handle?

This model is rated for 180 amps continuous load and can handle short intermittent surges up to 1000 amps, making it suitable for starters, winches and large accessory loads. The rating ensures it tolerates normal running currents with margin for starter cranking or other transient peaks.

• 180A continuous rating for sustained electrical systems
• 1000A intermittent capacity to survive short high-current events
• 3/8" studs compatible with heavy-gauge battery cable lugs

How do I mount and protect the switch in different installations?

Install the switch through a standard 3/4" hole for a neat flush panel fit, or use the optional Fastronix 980-000 switch mount to secure it to any flat surface using two 1/4" fasteners. For exposed terminals or high-vibration environments, Fastronix 404-110 terminal covers add electrical protection and reduce corrosion risk.

• Flush panel install in a 3/4" hole for clean appearance
• Surface-mountable with 980-000 adapter for flexible placement
• Compatible with 404-110 terminal covers to insulate studs

Where is this switch most useful in everyday and specialized use?

While common in race cars to meet technical rules, the switch is also a practical safety and storage accessory for RVs, boats, off-road rigs and workshop power systems. It provides a simple, visible way to cut power for long-term storage, maintenance, or emergency isolation.

• RV battery cutoff to prevent drain during storage
• Marine and off-road vehicles requiring robust current capacity
• Race cars with relocated batteries needing a single accessible kill

Who is this for: Technicians, racers, marine installers and DIY owners who need a compact, high-capacity master battery disconnect. If you require a dependable manual cutoff rated for heavy continuous loads and large intermittent surges — and want multiple mounting options plus optional terminal protection — the Fastronix 3/8" 2-post SPST switch is engineered for those needs.