Siemens BQ3B030H - 30 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

The Siemens BQ3B030H is a high-reliability 30A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for busy electrical environments, it combines rugged mounting with precise protection to keep critical circuits safe and active.

• Secure bolt-on mounting: Provides a rigid, vibration-resistant connection to the bus, reducing the risk of loosening under demanding equipment loads and frequent door cycling in service panels.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection performance by combining thermal overload sensing with magnetic short-circuit discrimination for fast, clear trips when faults occur.
• 3-pole, 30A, 240V configuration: Ideal for protecting three conductors in 3-phase or multi-wire systems, safeguarding feeders and branch circuits that require coordinated protection across all poles.
• OEM panel compatibility: Designed to pair with matching Siemens OEM load centers and panelboards, ensuring proper fit, consistent trip characteristics, and streamlined replacement in existing installations.
• Versatile for multiple applications: Suitable for residential environments with three-phase needs, light commercial panels, and small industrial setups that demand reliable overcurrent protection without sacrificing space or ease of installation.

Why it matters

In panelboards and load centers where space is at a premium and reliability is non-negotiable, the BQ3B030H offers a robust, field-proven solution. The bolt-on design minimizes bus connection issues caused by vibration or panel movement, while the thermal-magnetic trip delivers predictable protection so you know exactly when and why a circuit trips. This clarity helps with troubleshooting, reduces downtime, and supports safer electrical systems overall.

Key specifications at a glance

• Manufacturer: Siemens
• Part number: BQ3B030H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 30A
• Voltage rating: 240V
• Number of poles: 3
• Mounting style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal for engineers, electricians, and facility managers seeking dependable protection in Siemens-based panelboards and load centers, the BQ3B030H helps you design safer electrical systems with fewer nuisance trips and easier maintenance. When you need a trusted, OEM-compatible 3-pole breaker for 240V service, this unit delivers the performance and compatibility that professional installations rely on.