QR22B150 - 150 Amp Circuit Breaker

QR22B150 - 150 Amp Circuit Breaker

Seeking a reliable circuit protection solution for your 240V systems? The Siemens QR22B150 is a 2-pole, 150 A molded-case circuit breaker built for demanding environments—ideal for commercial panels, switchboards, and OEM control enclosures. It combines long-time and instantaneous trip mechanisms in a thermal-magnetic unit that responds quickly to both sustained overloads and short-circuit faults. With a 10 kA interrupting rating, it handles typical fault currents in mid-size installations. The bolt-on mounting method ensures the breaker stays secured in place, while its compact QR frame helps you save space inside enclosures. This model arrives without line-side lugs installed, giving you flexibility to configure as needed.

Key Features and Benefits

• Thermal-Magnetic Trip: Offers both long-time (overload) and instantaneous (short-circuit) protection in one device.
• High Interrupting Capacity: Rated for 10 kA at 240 V, giving you margin for typical fault currents.
• Compact QR Frame: Saves valuable space in panelboards and switchgear.
• Bolt-On Mounting: Secures the breaker to the panel firmly and cleanly.
• Accessory Ready: Accepts UL-listed internal options such as shunt trips and auxiliary switches without replacing the central unit.
• Push-to-Trip Feature: Enables manual testing/trip via a built-in push button (where supported in QR series).

Technical Specifications

• Voltage Rating: 240 V AC (phase-to-phase and phase-to-ground)
• Amperage: 150 A continuous
• Poles: 2
• Interrupting Capacity: 10 kA at 240 V
• Trip Type: Thermal-Magnetic (Long-Time + Instantaneous)
• Mounting: Bolt-On
• Dimensions:
  • Height: ~7.087 inches
  • Width: ~4.331 inches
  • Depth: ~3.937 inches
• Weight: ~3.2 lb

Material Compliance and Certifications

• Standards Met: UL 489, CSA C22.2, NOM-003 (Mexico)
• RoHS / REACH: No current data on full RoHS compliance; manufacturer reports no known Substances of Very High Concern (SVHC) above threshold under REACH at present.
• Quality Assurance: Produced under Siemens’ low-voltage molded case circuit breaker program, with internal testing and conformity to relevant safety standards.

Where It Works Best

• The QR22B150 finds its sweet spot in commercial and industrial electrical systems that require solid, reliable protection at 240 V. It is well-suited for:
• Panelboards and switchgear in commercial buildings
• Switchboards and motor control centers
• Metering and modular metering enclosures
• OEM control and distribution systems
• Retrofit upgrades in 240 V systems needing enhanced fault protection