Square D EGB34045 - 45 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D EGB34045, a rugged 45‑amp, 480‑volt, 3‑pole bolt‑on molded case circuit breaker from AmpState. Designed to deliver dependable branch circuit overcurrent and short‑circuit protection, it’s a smart choice for commercial, light industrial, and even select residential panel installations that demand robust performance and reliable uptime.

Why this bolt‑on breaker stands out

• Secure bolt‑on mounting provides a rigid, vibration‑resistant bus connection. This means fewer loosened connections in environments with vibration or frequent panel access, translating to more consistent protection and reduced maintenance.
• Thermal‑magnetic trip unit delivers stable, repeatable protection. The thermal element handles overloads while the magnetic element responds quickly to short circuits, ensuring fast, predictable tripping behavior under diverse operating temperatures.
• 3‑pole design for three‑phase systems and a 45A rating make it ideal for protecting feeders and branch circuits in 3‑phase panelboards and load centers operating at 480V.
• OEM compatibility is built in — designed to work with matching Square D OEM load centers and panelboards, helping ensure smooth installation and aligned protection curves.
• Versatile application suitable for residential, commercial, and light industrial environments where reliable protection is essential for critical equipment and wiring infrastructure.

Technical snapshot

• Manufacturer: Square D
• Part number: EGB34045
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage rating: 45A
• Voltage rating: 480V
• Poles: 3
• Mounting style: Bolt‑on
• Applications: Branch circuit overcurrent and short‑circuit protection in panelboards and load centers

Practical guidance and use cases

Use the EGB34045 when you need a reliable 3‑phase protection device for 480V systems in commercial or light industrial electrical rooms, or when upgrading older panelboards to a robust, OEM‑compatible solution. It’s well suited for feeders that require consistent trip characteristics across a range of temperatures and for installations where a secure mechanical connection minimizes vibration‑induced wear over time.

How this model compares (in practical terms)

Compared with plug‑in breakers, this bolt‑on design emphasizes a sturdier bus connection ideal for tougher environments. The combination of a thermal and magnetic trip mechanism provides both smooth operation during normal loading and rapid response during fault conditions, helping protect wiring, motors, and downstream equipment without nuisance tripping in normal temperature swings.

Installation and care tips

1. Ensure compatibility with your panelboard’s OEM specifications before installation.
2. Mount securely using the bolt‑on method to maximize bus stability and heat dissipation.
3. Follow local electrical codes and manufacturer installation guidelines for torque and wiring practices.
4. Schedule periodic inspections of connections and trip performance as part of routine electrical maintenance.

Choosing the Square D EGB34045 from AmpState gives you a purpose‑built, three‑pole 45A protection device designed for reliability in 480V, 3‑phase commercial and light industrial circuits. It’s the right choice when you need proven protection, OEM compatibility, and a mounting solution that holds up in demanding environments.