A1B340 - 40 Amp Circuit Breaker

A1B340 - 40 Amp Circuit Breaker

When you need dependable performance from your electrical protection gear, the A1B340 delivers. This 40‑amp thermal‑magnetic circuit breaker combines dependable overload and short‑circuit protection in a compact, easy-to-install package. It’s built for environments where consistency matters — from electrical panels in commercial buildings to industrial applications powering heavy-duty equipment. With the A1B340, you get a dependable breaker that keeps circuits safe under varying loads and helps prevent costly downtime.

Key Features and Benefits

• Dual Protection, One Simple Unit: The A1B340 uses both thermal overload protection and magnetic short-circuit response. That means it guards against overheating under sustained loads, and trips instantly if a dangerous surge or short occurs.
• Bolt-On Installation: Its bolt-on form makes mounting straightforward and secure. Installers appreciate how quickly it locks into place, helping reduce labor time and errors in electrical panels.
• High Interrupting Capacity: Rated at 10,000 A.I.C. at 240 VAC, this breaker can safely interrupt high fault currents common in heavy-duty applications. It’s ready to handle demanding situations without failing when you need it most.
• Space-Saving Fit: With a modest size of 2.25" W × 6.00" L × 2.31" D, the breaker fits into standard panel layouts without cluttering the space — leaving room for future expansion or additional circuits.

Technical Specifications

• Poles: 3
• Amperage: 40 A
• Interrupting Capacity (A.I.C.): 10,000 A @ 240 VAC
• Frame Type: A1B
• Dimensions:
  • Width: 2.25 inches
  • Length: 6.00 inches
  • Depth: 2.31 inches
• Approximate Ship Weight: 3.10 lbs

Material Compliance and Certifications

• Crafted from high-grade, code-compliant materials: The A1B340 meets stringent safety and durability standards. It’s manufactured under rigorous industrial protocols to ensure consistent trip performance under both overload and short-circuit conditions. This adherence to top electrical codes and certifications gives you confidence that the breaker will perform reliably in even the most demanding environments.

Where It Works Best

• The A1B340 is ideal for a variety of commercial and industrial settings. It performs especially well in facilities with heavy machinery, HVAC systems, motor controls, or other high-power equipment — wherever a reliable 40‑amp breaker is required for overload or short-circuit protection. Whether you’re outfitting a manufacturing floor, updating building panels, or installing service entrance protection, the A1B340 is a smart choice when you want solid, dependable circuit protection that keeps things running smoothly.