Pollak 54-856PL 250 Amp Type I High Amp Circuit Breaker – 30V DC, Ignition Protected Industrial Plastic Housing

Industrial-Grade Overcurrent Protection for Extreme Amperage 

The Pollak 54-856PL represents the peak of the Pollak PL series, providing a massive 250 Amp capacity. This single-pole thermal circuit breaker is designed for the most demanding DC power environments, where traditional fuses are impractical due to the cost and downtime of replacement. Rated for up to 30V DC, it is the professional choice for protecting master power circuits in heavy-duty commercial vehicles and industrial equipment.

Ruggedized Thermoset Plastic Construction 

High amperage creates high heat, which is why the 54-856PL utilizes a premium thermoset plastic housing (UL rated 94V-0). This material ensures the breaker remains structurally sound under thermal stress while offering superior benefits over metal housings:

• Safe High-Current Isolation: The non-conductive body eliminates the risk of terminal-to-case short circuits, a vital safety feature for 250A lines.

• Ignition Protected & Sealed: Fully compliant with SAE J1625 and J1171, making it safe for use in marine engine rooms and battery compartments. The splash-proof and dust-proof design protects internal components from harsh road or sea conditions.

• Corrosion-Proof Surface Mount: The heavy-duty two-hole mounting base is engineered to withstand the extreme vibrations of industrial machinery and commercial truck chassis.

Type I Automatic Reset (Cycling) Efficiency 

Equipped with Type I auto-reset technology, this breaker provides continuous protection without manual intervention. If a temporary overcurrent occurs, the breaker trips to save your equipment and automatically resets once it cools. This is essential for maintaining operation in high-draw systems like industrial winches or large-scale inverters.

Typical Applications:

• Master power protection for 4000W+ Power Inverters

• Industrial-grade recovery winches and cranes

• Main DC distribution for large-scale RV and Marine battery banks

• Heavy-duty hydraulic systems and motor starters

• Construction and mining equipment auxiliary power

Technical Specifications:

• Part Number: 54-856PL

• Current Rating: 250 Amps

• Voltage Rating: Up to 30V DC

• Reset Type: Type I (Automatic Reset / Cycling)

• Housing: Thermoset Plastic (UL Rated 94V-0)

• Mounting: Surface Mount

• Terminals: Two 1/4" - 28 Stainless Steel Studs (Includes stud insulators)

• Operating Temp: -25°F to +180°F (-32°C to +82°C)

• Standards Compliance: SAE J1625, SAE J1171 (Ignition Protected)