Square D | QH120 | Circuit Breaker | 20A | 1-Pole | 240V | Plug-In

The Square D QH120 Circuit Breaker is a purpose-built, plug-in solution designed for quick, dependable protection in compatible panels. With a 20-amp rating, 1-pole configuration, and 240V capability, this device is ideal for maintenance, retrofit, and replacement projects where exact specification matches are essential. Reference the QH120 part number to ensure a perfect fit in your Square D panel system.

Key specifications at a glance

• Amperage: 20A
• Poles: 1-Pole
• Voltage: 240V
• Mounting: Plug-In
• Compatibility reference: QH120 (best reference for panel compatibility)

Why this matters for your project

• Plug-in design minimizes installation time and panel disruption, so you can restore circuit protection quickly after a fault or during a panel refresh.
• Designed to align with Square D’s safety standards and trip characteristics, delivering consistent protection for circuits that require 20 amps at 240 volts.
• Using the exact part number helps maintain UL labeling accuracy and warranty coverage on your panel, reducing the risk of compatibility issues down the line.

Ideal use cases

• Repair or replacement in existing Square D panels where a 1-pole, 240V, 20A plug-in breaker is specified.
• Retrofit projects that require a precise part number match to ensure correct bus bar engagement and trip performance.
• Maintenance workflows in electrical service upgrades where downtime needs to be minimized and compatibility verified beforehand.

Practical guidance for installation and compatibility

• Before ordering, confirm fit and ratings against your panel’s labeling and service requirements; the QH120 is the recommended reference for this breaker type.
• Ensure your panel is designed for plug-in, 1-pole 240V protection and that the mounting style matches the QH series specifications.
• Retain the part number reference (QH120) in your project notes to streamline future replacements or panel servicing.