Siemens BQ2B070 - 70 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Designed for dependable branch-circuit protection in electrical panels, the Siemens BQ2B070 is a 70A, 240V, 2-pole bolt-on molded case circuit breaker engineered to safeguard against overcurrent and short circuits. It’s built to deliver consistent performance in a variety of panelboard environments, from residential to light commercial settings.

• Secure bolt-on mounting delivers a rigid, vibration-resistant bus connection that stays tight through load swings and panel vibrations.
• Thermal-magnetic trip unit provides stable, repeatable protection across temperature and current variations, reducing nuisance trips while maintaining reliable safety.
• OEM-compatible design matches Siemens OEM load centers and panelboards for a seamless, code-compliant upgrade or installation.
• Versatile for multiple applications ideal for residential panels, commercial distribution boards, and light industrial applications where dependable protection is essential.

The BQ2B070 is a two-pole breaker rated for 70A at 240V, offering coordinated protection for circuits that require disconnection on both live conductors. This makes it a practical choice for protecting feeders, branch circuits, and critical loads in a compact, easy-to-install package.

Technical specifications

• Manufacturer: Siemens
• Part Number: BQ2B070
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 70A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

Use the BQ2B070 in residential service panels for reliable whole-house and subpanel protection, in small commercial boards for lighting and outlet circuits, or in light industrial panels where consistent protection and robust mounting are priorities. Its bolt-on design simplifies installation in existing panelboards that require a secure, vibration-resistant connection.

Pair this breaker with matching Siemens panelboards for optimal compatibility and coordinated protection. With its solid construction, clear trip characteristics, and practical 2-pole 240V configuration, the BQ2B070 helps you maintain safe, compliant electrical distribution across a range of environments.