Siemens Q1520NC - 20 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState

The Siemens Q1520NC stands ready to shield your branch circuits with precision and reliability. This 20A, 120V, 1-pole plug-in molded case circuit breaker is purpose-built for quick installation, easy replacement, and dependable protection in panelboards and load centers. Whether you’re wiring a home, a small business, or an light industrial space, this breaker delivers consistent performance when it matters most.

• Fast plug-in connection for rapid installation and hassle-free replacement, reducing downtime during maintenance or upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining overload and short-circuit protection in a single, compact device.
• OEM-compatible design ensures seamless compatibility with matching Siemens load centers and panelboards, preserving system integrity and ratings.
• Versatile applications suitable for residential, commercial, and light industrial circuits that require reliable branch-circuit protection.

Product details at a glance

• Manufacturer: Siemens
• Part number: Q1520NC
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 20A
• Voltage rating: 120V
• Number of poles: 1
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Why this breaker matters for your electrical system

By choosing the Siemens Q1520NC, you’re investing in a component that prioritizes safety and uptime. The 20A rating makes it ideal for protecting lighting and receptacle circuits, small equipment feeds, and other branch circuits where reliable interruption during an overload or short is essential. The plug-in design minimizes service interruptions during maintenance, while the thermal-magnetic trip unit delivers predictable response characteristics that electricians rely on for consistent protection across loads.

Ideal use cases

• Upgrading or replacing a worn or failing breaker in Siemens panelboards and load centers.
• Installing new single-pole protection for branch circuits in residential wiring or light commercial setups.
• Maintaining service continuity in offices, retail spaces, or workshops that depend on stable circuit protection.

Practical guidance for installation and maintenance

• Use only in compatible Siemens OEM load centers and panelboards to ensure proper fit and protection standards.
• Follow all local electrical codes and Siemens installation guidelines when wiring or replacing breakers.
• Turn off main power before servicing and permit qualified personnel to perform electrical work.
• Keep spare Q1520NC breakers on hand for quick replacements to minimize downtime during routine maintenance or upgrades.