Pollak 51-904 Master Disconnect Switch Kit – DPST Lever Operated, 180A Continuous

The Pollak 51-904 Master Disconnect Switch Kit is a heavy-duty electrical safety solution designed to provide instant power cut-off for 6V-36V DC systems. Whether you are looking to prevent battery drain during long-term storage, secure your vehicle against theft, or ensure safety during maintenance, this DPST (Double Pole, Single Throw) lever-operated switch is the industry standard for reliability.

Engineered for the toughest environments, the 51-904 features a one-piece die-cast housing and is O-ring sealed at the base and mounting stem to lock out dust, dirt, and moisture.

Key Features

• Dual Circuit Control: The DPST configuration allows you to disconnect both the battery and the alternator/generator field circuit simultaneously.

• Superior Durability: Built with a rugged die-cast metal housing and heavy-duty silver-plated contacts for maximum conductivity and long service life.

• Weatherproof Design: Environmentally sealed with O-rings to protect internal components from corrosion and debris.

• High Power Capacity: Handles a 180 Amp continuous load and a massive 1000 Amp intermittent in-rush.

• Safety First: Designed to break the alternator circuit before the battery circuit to prevent voltage spikes and equipment damage.

Technical Specifications

• Part Number: 51-904 (also known as 51-904EP)

• Circuitry: DPST (Off-On)

• Voltage Rating: 6V - 36V DC

• Current Rating: 180A Continuous / 1000A Intermittent (20 sec ON / 5 min OFF)

• Terminals: Two 3/8"-24 copper alloy studs (Battery) and two #10-32 studs (Alternator)

• Mounting Stem: 3/4" Diameter, 1/2" Long (fits panels up to 1/4" thick)

• Actuator: Lever Operated

Common Applications

This master disconnect switch is perfect for:

• Heavy-Duty Trucks & Commercial Fleets

• Construction & Agricultural Equipment

• Marine & Boats

• RVs, Campers, and Off-Road Vehicles