Pollak 51-902 Master Disconnect Switch – Lever Operated, SPST, 180A

Heavy-Duty Battery Master Disconnect Switch for Automotive & Motorsport Use

The Pollak 51-902 is a rugged, lever-operated SPST battery master disconnect switch built for vehicles that demand reliable, instant power cutoff. Whether you're prepping a race car, securing a work truck, or protecting a stored vehicle from parasitic drain, this switch delivers the durability and current capacity to get the job done right.

Key Specifications

• Switch Type: SPST (Single Pole, Single Throw) – Off/On
• Current Rating: 180 Amps continuous
• In-Rush Rating: 1,000 Amps
• Voltage Range: 6–36V DC
• Terminal Type: (2) 3/8" studs
• Housing: One-piece die-cast, sealed construction
• Dimensions: 2-5/8" diameter × 4-3/8" long
• Mounting Stem: 3/4" diameter × 1/2" long
• Operation: Lever operated
• Certification: UL558 listed
• Includes: Switch plate

Why Choose the Pollak 51-902?

With a sealed, one-piece die-cast housing, the 51-902 stands up to the vibration, heat, and moisture exposure common in motorsport and commercial vehicle environments. The lever-operated design gives you fast, positive actuation — no fumbling for a key or a recessed button when you need to cut power quickly.

The 1,000-amp in-rush rating means it handles the surge demand of starter motors without flinching, while the 180-amp continuous rating covers virtually any 12V or 24V vehicle electrical system.

Important Notes

• Designed for battery circuit use only
• Does not disconnect the alternator or generator — for full electrical isolation, additional steps may be required
• Compatible with 6V, 12V, 24V, and up to 36V DC systems

A trusted name in disconnect switches — the Pollak 51-902 is the straightforward, reliable choice for anyone who needs a heavy-duty master disconnect they can count on.