997318 - 150 Amp Circuit Breaker

997318 - 150 Amp Circuit Breaker

If you’re looking for a heavy‑duty circuit breaker that delivers dependable, long-term protection for industrial or commercial electrical systems, the 997318 150 Amp molded case breaker is engineered to deliver. This three‑pole, J‑Frame circuit breaker with a thermal‑magnetic trip unit safeguards your system against overloads and short circuits, while offering a clean and compact profile that fits most electrical enclosures. With a high 600 VAC rating and 150 A capacity, it supports demanding loads such as motors, HVAC systems, and heavy equipment. Precise trip response and solid construction give you peace of mind — so you can count on uninterrupted performance day in and day out.

Key Features and Benefits

• Reliable overload and short‑circuit protection: The built‑in thermal‑magnetic trip mechanism responds quickly and accurately to current surges — protecting your wiring, equipment, and personnel.
• High power capacity: A full 150 Amp rating and 600 VAC voltage handling make it well-suited for industrial motors, compressors, and large HVAC systems.
• Compact, molded‑case design: The J‑Frame molded-case design keeps installation neat while providing protection against dust, moisture, and harsh environmental conditions, making it ideal for plant floors, utility rooms, and commercial facilities.
• Consistent performance across demanding tasks: Whether powering machinery or serving as main distribution protection, this breaker handles repeated cycles and heavy loads reliably — reducing downtime and maintenance costs.

Technical Specifications

• Current Rating: 150 Amperes (150 A)
• Voltage Rating: 600 VAC
• Number of Poles: 3‑Pole
• Frame Type: ML‑3 (J‑Frame molded case)
• Trip Unit Type: Thermal‑Magnetic
• Dimensions:
  • Width: 6.00″
  • Length: 10.38″
  • Depth: 3.88″
• Ship/Install Weight: ~14 lbs

Material Compliance and Certifications

• Industry Standards: The 997318 circuit breaker is built using premium materials and manufactured under strict quality control standards to meet or exceed industry safety requirements. It adheres to applicable UL/CSA-style specifications for molded-case circuit breakers and is designed to meet environmental and regulatory guidelines relevant to industrial equipment. Each unit undergoes rigorous testing to ensure reliable performance under load, temperature, and stress conditions — giving you confidence in a safe, code-compliant installation.

Where It Works Best

• Commercial buildings, warehouses, and manufacturing plants needing reliable three‑phase protection
• Heavy-duty applications such as motors, compressors, large HVAC units, or industrial machinery
• Contractors, electricians, and facility managers installing or upgrading power distribution panels, branch circuits, or equipment circuits
• Any setting where dependable circuit protection under continuous heavy load is critical