YZQPNB Battery Disconnect Switch - Lockable Negative Cut-Off, 500A Continuous, Sealed Panel-Mount

The YZQPNB Battery Disconnect Switch is a heavy-duty, lockable negative-battery cut-off rated for 500A (instant 5000A) that isolates power on cars, boats, RVs and trucks.

Designed for vehicles and marine craft that need a reliable, serviceable way to kill battery feed, this negative-ground switch offers a simple rotary operation, a lockout plate for safety or service, and rugged construction for long-term outdoor and engine-bay use. It accepts common negative battery cables on dual 10mm threaded studs and works across 12V, 24V and 36V systems, making it a versatile choice whether you’re preventing parasitic drain, performing maintenance, or adding an anti-theft layer.

How does the YZQPNB switch work and install?

Operation is straightforward: turn the knob to open or close the negative battery connection. Mounting requires a panel cutout for the sealed body and fastening the lockout plate so the knob can be padlocked when open or closed.

• Turn-knob actuation for quick open/close control
• Two 10mm threaded studs and included nuts for negative cable attachment
• Panel-mount with included lockout/mounting bracket
• Sealed housing reduces exposure to moisture and grime during installation

What electrical specs and protections does it offer?

This switch is built for high-current applications and short-duration surge events. It is rated for continuous currents up to 500A and can tolerate instantaneous surges up to 5000A, compatible with 12V, 24V, and 36V systems.

• Working voltages: 12V / 24V / 36V for broad compatibility
• Rated continuous current: 500A; instantaneous current: 5000A
• Silver-plated copper connection material for improved conductivity
• Die-cast handle and sealed design for durability and moisture resistance

Can this switch be locked out and used for safety or theft deterrence?

Yes — the unit includes a lockout plate so you can secure the knob with a padlock to prevent accidental or unauthorized switching. That feature is useful during shop work, long-term storage, or as a simple theft-prevention measure.

• Lockout plate mounts to panel for padlock use
• Prevents accidental power reconnection during maintenance
• Adds a basic theft-deterrent when installed in an accessible location
• Sturdy handle resists tampering and mechanical wear

Where does this switch perform best and what environments is it built for?

Built for rugged vehicle and marine conditions, the sealed body and heavy-duty components make this switch suitable for engine bays, battery boxes, and exposed compartments. It’s appropriate for passenger vehicles, commercial trucks, RVs, boats, yachts, and construction equipment.

• Sealed, waterproof design withstands splash and moisture
• Corrosion-resistant silver-plated copper terminals improve longevity
• Heavy die-cast handle stands up to repeated use in tough environments
• Works with common negative-ground wiring on a wide range of vehicles

Who this is for: installers, fleet managers, boat owners, RVers and DIY mechanics who need a reliable, high-current negative battery disconnect with lockout capability. Choose this switch if you want a robust, serviceable way to prevent parasitic drain, safely isolate batteries for maintenance, or add a simple anti-tamper function in 12V–36V systems.