999340 - 40 Amp Circuit Breaker

999340 - 40 Amp Circuit Breaker

Discover the power and reliability of the 999340 – a heavy‑duty 40 Amp, 3‑pole molded‑case circuit breaker engineered for industrial-grade performance. Built around a tough ML‑1 Frame, this thermal‑magnetic breaker delivers steady, dependable protection for systems operating up to 600 VAC. Whether you’re upgrading electrical panels or outfitting commercial equipment, the 999340 stands ready to safeguard your infrastructure from overloads or short circuits — and let you rest easy knowing your wiring is protected.

Key Features and Benefits

• Thermal‑Magnetic Protection: Combines a heat‑sensitive thermal trip and a magnetic short‑circuit trip, giving you dual-layer protection against overloads and faults.
• Space‑Saving Design: Compact dimensions make it easy to install even in tight electrical enclosures — ideal when panel space is limited.
• Long‑Lasting Construction: Built on a solid ML‑1 frame, this breaker is crafted to hold up under the strain of heavy industrial and commercial use.
• High-Voltage Readiness: Rated for up to 600 VAC, making it suitable for a broad range of demanding electrical systems.
• Reliable Three‑Pole Configuration: Perfect for balanced, three-phase circuits — delivering consistent performance across all phases.

Technical Specifications

• Poles: 3
  
• Amperage: 40 A
  
• Voltage Rating: 600 VAC
  
• Frame Type: ML‑1 (F‑Frame, molded‑case)
  
• Dimensions:
  • Width: 4.50 inches
  • Length: 6.50 inches
  • Depth: 3.00 inches
• Weight: 7 lbs
  

Material Compliance and Certifications

• Manufactured to meet rigorous electrical‑industry standards, the 999340 is built using high‑grade materials engineered for safety and longevity. Its construction ensures dependable performance under heavy loads, and safeguards your system against wear, electrical stress, and environmental factors. Regulatory compliance is maintained to satisfy the demands of commercial and industrial electrical codes, giving you peace of mind when deploying in mission-critical applications.

Where It Works Best

• This circuit breaker is ideal for industrial machinery control panels, large commercial electrical enclosures, or any three-phase power distribution setup needing dependable 40 Amp protection. It excels in heavy-use environments — from factories and workshops to commercial buildings — where electrical safety and uninterrupted power delivery are essential. If you’re outfitting an industrial power circuit or upgrading a commercial panel, the 999340 offers the solid protection and reliability you need without a