Square D ECB34020G3 - 20 A, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Square D ECB34020G3 — a purpose-built 20 A, 3-pole bolt-on molded case circuit breaker designed to protect every branch of your electrical system with precision. Built for dependable overcurrent and short-circuit protection in panelboards and load centers, this unit keeps your circuits safer, longer, and more reliable in real-world conditions.

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection, minimizing loosening and maintaining consistent electrical contact over time.
• Thermal-magnetic trip unit provides stable, repeatable protection performance by responding to both overloads and short circuits, reducing nuisance trips while preserving circuit integrity.
• OEM-compatible design is engineered to work seamlessly with matching OEM load centers and panelboards, simplifying replacement and upgrades in existing installations.
• Versatile application suitable for residential, commercial, and light industrial environments, making it a practical choice for a wide range of projects.

Why this matters in the field: a bolt-on ECB like the ECB34020G3 enables straightforward installation in compatible panelboards, with a robust connection that stands up to vibration and normal operating conditions. The thermal-magnetic protection curve provides dependable tripping behavior, helping prevent damage from overloads and keeping shutdowns predictable when a fault occurs. This is especially valuable in panelboard upgrades, service panel refurbishments, or new installations where reliability and standardization are priorities.

Technical snapshot

• Manufacturer: Square D
• Part Number: ECB34020G3
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20 A
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

This device is the right choice when you need a dependable, OEM-aligned solution that fits your panelboard ecosystem and provides consistent protection for three-phase or multi-pole circuits in a compact, bolt-on package. Ideal for AmpState customers seeking a proven, service-ready breaker that aligns with Square D standards and OEM layouts.

Practical usage ideas:

• Upgrade or replace existing 3-pole protection in residential or light commercial panelboards to improve fault response and reliability.
• Install in new panel centers that require bolt-on molded case breakers with solid bus connections for vibration-prone environments.
• Use in applications where consistent, predictable trip behavior is essential for safeguarding motors, lighting, and power distribution circuits.

At a glance

• 3-pole, 20 A bolt-on molded case circuit breaker
• Thermal-magnetic protection for overload and short-circuit events
• Manufactured by Square D; compatible with OEM panelboards and load centers
• Suitable across residential, commercial, and light industrial settings