Siemens QN2150RH - 150 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

The Siemens QN2150RH is a 150 A, 240 V, 2-pole plug-in molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for fast, hassle-free service, this unit features a quick plug-in connection that speeds installation and makes replacements straightforward, minimizing downtime on critical electrical systems.

At its core, a thermal-magnetic trip unit provides stable, repeatable protection. The thermal element detects gradual overloads, while the magnetic element responds instantly to high-magnitude faults, delivering precise protection without nuisance trips. With the QN2150RH in your panel, you get reliable coordination and consistent performance under varying loads and environmental conditions.

Designed for seamless integration, this breaker is compatible with matching OEM load centers and panelboards. Whether you’re updating a residential service, outfitting a small commercial space, or configuring a light industrial panel, the Siemens QN2150RH fits the bill and helps maintain a clean, code-compliant protection scheme.

• Fast plug-in connection for rapid installation and easy field replacement, reducing downtime during panel upgrades or outages.
• Thermal-magnetic trip unit delivers stable overload protection plus rapid short-circuit response for dependable safety.
• 2-pole, 150 A, 240 V configuration suited for main/branch circuit protection in a variety of panel setups.
• Plug-in molded case design supports straightforward installation and secure mounting in compatible panelboards.
• OEM-compatible with matching Siemens panelboards and load centers for a reliable, authorized replacement solution.
• Versatile applications ideal for residential, commercial, and light industrial environments demanding robust circuit protection.

Technical specifications

• Manufacturer: Siemens
• Part Number: QN2150RH
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Who benefits most

Electricians, panel installers, property managers, and facility engineers will appreciate the Siemens QN2150RH for its quick installation, reliable protection, and OEM compatibility. It’s an excellent choice when upgrading aging panels, expanding electrical capability in a shop or office, or delivering code-compliant protection in new constructions.

Practical tips for installation and use

• Verify the panelboard is compatible with Siemens QN series plug-in breakers to ensure a proper fit and coordinated protection.
• Before work begins, power down the panel and follow lockout/tagout procedures. Use the correct personal protective equipment and tools.
• Confirm the amperage rating (150 A) and voltage (240 V) match the circuit requirements and labeling in your panel.
• Insert firmly into the bus stabs until it seats fully; test the mechanism prior to re-energizing the system to ensure proper trip operation.
• Keep spare QN2150RH on hand for quick replacements during maintenance or expansions to minimize downtime.