Siemens QR22B150L - 150 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Siemens QR22B150L is a 150 A, 240 V, 2-pole bolt-on molded case circuit breaker designed to protect your electrical system from overcurrent and short circuits. Built for dependable performance in panelboards and load centers, this unit delivers a secure, vibration-resistant connection and precise protective action when it matters most.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection that stays put in busy panels and environments with movement.
• Thermal-magnetic trip unit delivers stable, repeatable protection across varying loads, reducing nuisance trips while ensuring fast response to faults.
• Plug-and-play compatibility with matching Siemens OEM load centers and panelboards for straightforward upgrades and replacements.
• Versatile application suitable for residential, commercial, and light industrial electrical distributions demanding reliable branch-circuit protection.
• Clear protection scope guards each branch circuit from overcurrent and short circuits, helping prevent equipment damage and electrical fires.
• 2-pole, 150 A, 240 V configuration tailored for common 2-wire/grounded systems in modern panel setups.

Why this matters in real-world installations

When panel reliability and uptime are non-negotiable, the QR22B150L delivers. The bolt-on design keeps the breaker securely seated even in panels subject to vibration from heating, cooling, or heavy equipment. The thermal-magnetic trip ensures predictable disconnection behavior, so you’re not surprised by trips during startup surges or high-demand periods. This makes it a practical choice for service panels in homes, commercial suites, light industrial shops, and mechanical rooms where dependable protection is essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: QR22B150L
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 150 A
• Voltage rating: 240 V
• Number of poles: 2
• Mounting style: Bolt-on
• Applications: Branch circuit overcurrent and short-circuit protection

Ideal for

• Replacing aging breakers in existing panelboards and load centers
• Upgrading service panels to support higher continuous loads
• Residential service entrances, small commercial spaces, and light industrial equipment rooms

With the Siemens QR22B150L, you get a purpose-built, dependable solution that aligns with Siemens’ panelboard ecosystems, delivering clear protection benefits, installer-friendly mounting, and compatibility you can trust for years of trouble-free operation.