Siemens BQD6370 - 70 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens BQD6370 is a rugged 70A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable overcurrent and short-circuit protection in panelboards and load centers. Built to stay secure under vibration and varying electrical conditions, it provides reliable protection where three-phase power is in play, from residential service upgrades to light commercial applications.

• Secure bolt-on mounting creates a rigid, vibration-resistant bus connection that stays tight through demanding service conditions.
• Thermal-magnetic trip unit offers stable, repeatable protection performance by adapting to changing temperatures and load levels, reducing nuisance trips and ensuring predictable responses to faults.
• OEM-compatible design is engineered to pair seamlessly with matching Siemens load centers and panelboards, simplifying installation and reducing compatibility concerns.
• 3-pole configuration supports true three-phase protection, ensuring synchronized trips across all three conductors for balanced, effective circuit safety.
• 70A, 600V rating is ideal for branch circuits in residential, commercial, and light industrial environments, providing robust protection for moderate-duty electrical systems.
• Durable molded-case construction withstands field conditions and provides long-lasting performance in a variety of panel environments.

The BQD6370 is more than a breaker—it’s a deliberate choice for panels that demand reliability and compatibility. When installed in compatible Siemens OEM load centers or panelboards, it delivers a cohesive protection solution that aligns with your electrical design intent. Whether you're upgrading an existing service, implementing a new panel, or stocking a critical spare for service readiness, this bolt-on MCCB brings predictable trip characteristics and straightforward field installation to the job.

Key specifications at a glance

• Manufacturer: Siemens
• Part Number: BQD6370
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 70 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for installers and facilities teams seeking a trusted, compatible protection device for Siemens panel ecosystems, the BQD6370 simplifies selection, improves reliability, and supports safer, faster service outcomes across residential, commercial, and light industrial projects.