EH34040 - 40A Circuit Breaker

EH34040 - 40A Circuit Breaker

Looking for a dependable way to secure your electrical setup? The EH34040 Circuit Breaker makes it easy to keep things safe and running smoothly. Built on a durable EH‑4 frame, this 3‑pole, 40 A breaker takes on heavy-duty tasks in commercial and industrial sites with ease. It’s engineered for steady, high-performance protection—a smart pick when keeping your circuits secure matters.

Key Features and Benefits

• Thermal-magnetic protection – This breaker combines temperature- and magnetic-sensitive mechanisms to shut off quickly during overloads or short circuits, helping keep your systems—and your team—protected.
• High fault-current handling – With 14 kA interrupting capacity at 480 VAC and 65 kA at 240 VAC, it stands ready to tackle strong fault currents—ideal for demanding setups.
• Versatile usage – Whether it’s panelboards, switchboards, or other electrical distribution systems, this breaker adapts to a wide range of needs, from light commercial to heavy industrial.

Technical Specifications

FeatureDetails

Poles 3‑pole design for three-phase circuits

Amperes 40 A rating

A.I.C. Ratings 14 kA @ 480 VAC; 65 kA @ 240 VAC

Frame Type EH‑4

Dimensions (W×L×D) ~3.00″ × 3.50″ × 2.63″

Weight ~3 lb

Material Compliance and Certifications

• UL Listed – Meets recognized safety standards, so you can trust it's tested and approved.
• Temperature rating – Rated for 60 °C and 75 °C environments, ensuring performance under typical heat conditions.
• Wire compatibility – Supports #12–#2 AWG for both aluminum and copper, giving you flexibility during installation.

Where It Works Best

• Ideal for the NEHB Panelboard only – Designed specifically to pair with NEHB panelboards, this breaker slots right in and performs reliably.
• Great for new builds, upgrades, or replacements – Whether you’re outfitting a fresh setup, boosting capacity, or swapping out an old unit, the EH34040 delivers steady performance.
• Perfect for commercial and industrial spaces – Its design handles heavy currents without slowing down, so you're covered even in high-demand conditions.