EHB34090 - 90 Amp Circuit Breaker

EHB34090 - 90 Amp Circuit Breaker

The Square D EHB34090 90 Amp Circuit Breaker delivers dependable protection and seamless performance for heavier electrical loads in commercial and industrial settings. Engineered with a three‑pole, bolt‑on design, this breaker is designed to snap into place quickly and securely — no fuss, no extra parts needed. What really sets it apart is the thermal‑magnetic trip unit: whenever there’s an overload or short circuit, it cuts power fast to help safeguard connected equipment and reduce downtime. Built from solid, industrial‑grade materials, it stands up to demanding environments, day after day.

Key Features and Benefits

• High interrupting capacity — Can safely handle up to 14 kA at 480 VAC or 65 kA at 240 VAC, giving you reliable power protection even under heavy loads.
• Thermal‑magnetic trip unit — Reacts quickly to overloads or short circuits to help prevent equipment damage or fire hazards.
• Bolt‑on installation — Installs easily and securely without the need for extra tools or complicated mounting procedures.
• Durable, long‑lasting construction — Built for demanding industrial and commercial environments, so you can count on continuous, stable performance.

Technical Specifications

• Amperage: 90 Amps
• Poles: 3
• Interrupting Rating (A.I.C.):
  • 14 kA at 480 VAC
  • 65 kA at 240 VAC
• Frame Type: EHB‑4
• Mounting Style: Bolt‑On
• Approximate Dimensions:
  • Width: 3.00″
  • Length: 3.50″
  • Depth: 2.63″
• Weight: ~3 lb (1.36 kg)

Material Compliance and Certifications

• Safety certified: UL Listed — meets recognized safety and performance standards.
• Switching‑duty rated (SWD): Suitable for heavy-duty switching and interrupting applications.
• Temperature rating: Rated for 60/75 °C environments, making it fit for a range of operating conditions.

Where It Works Best

• This 90 Amp breaker is ideal for commercial buildings, light-industrial facilities, or any site where stable, dependable circuit protection is essential. If you’re managing multiple motors, heavy machinery, or critical HVAC/OEM loads, this breaker helps keep circuits safe and systems running smoothly. It pairs especially well with panelboards designed to accept the EHB series and stands as a solid choice when reliability under load is a must.