Siemens QR22B100 - 100 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens QR22B100 100A, 240V, 2-pole bolt-on molded case circuit breaker is engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Designed for residential, commercial, and light industrial environments, this breaker combines a secure bolt-on mounting with a thermal-magnetic trip unit for consistent protection you can rely on.

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays tight under operational motion.
• Thermal-magnetic trip unit delivers stable, repeatable protection against overloads and short circuits across a range of temperatures and loads.
• 2-pole design handles 240V circuits; 100A rating is ideal for main feeders and high-demand branch circuits.
• Guaranteed compatibility with matching Siemens OEM loadcenters and panelboards for straightforward installation and reliable performance.
• Suitable for a wide range of applications: residential appliances, commercial power distribution, and light industrial equipment.

Technical specifications

• Manufacturer: Siemens
• Part Number: QR22B100
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 100A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and ideal applications

• Replacing a failed 2-pole breaker in Siemens panelboards to restore 240V circuits such as air conditioning, water heating, or subpanel feeders.
• Configuring or upgrading a panel to support higher-current 2-pole loads for equipment in small commercial spaces or workshops.
• In new installations, providing robust, code-compliant protection for 240V branch circuits with a dependable bolt-on connection.

Who benefits most

• Electricians and contractors working with Siemens panelboards seeking a reliable 100A/240V 2-pole solution.
• Homeowners with existing Siemens panels needing durable, OEM-compatible protection for large 240V loads.
• Facility managers in light industrial settings requiring vibration-resistant, secure circuit protection for critical equipment.

Practical installation tips

• Confirm panelboard compatibility with QR22B100 and use the correct bolt-on hardware for a secure connection.
• Ensure power is fully shut off and follow local electrical codes during replacement or installation.
• Torque bolts to the manufacturer's specification to maintain a stable, vibration-resistant bus connection.
• Match the trip characteristics to the protected circuit and verify that the 100A rating aligns with the intended load to avoid nuisance tripping.