Siemens BQ2B030 - 30 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

The Siemens BQ2B030 is a rugged 2-pole bolt-on molded case circuit breaker engineered for reliable branch circuit protection in panelboards and load centers. With a 30A, 240V rating, this breaker is built to handle everyday residential and light commercial loads while delivering predictable, repeatable trip performance when it matters most.

Why this breaker stands out

• Secure bolt-on mounting: Provides a rigid, vibration-resistant connection to the bus, reducing the risk of loose contacts in busy panels and harsh environments.
• Thermal-magnetic trip unit: Combines overload protection (thermal) with instantaneous short-circuit protection (magnetic) for stable, welfare-friendly protection across a variety of operating conditions.
• OEM-fit compatibility: Designed to pair with matching Siemens load centers and panelboards, ensuring consistent electrical characteristics and easier serviceability.
• Durable construction: Molded-case design built to withstand panel vibration, heat, and routine maintenance cycles in residential, commercial, and light industrial settings.
• Clear electrical rating: 30A, 240V, 2-pole configuration provides simultaneous disconnection of both conductors for 240V circuits, enhancing safety and compliance.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: BQ2B030
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 30A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Residential panels needing reliable protection for 240V branch circuits such as HVAC, water heating, and large appliances
• Commercial load centers requiring consistent trip behavior for mid-range motor and equipment circuits
• Light industrial installations where robust bolt-on mounting ensures panel integrity in environments with vibration or heat buildup

Practical tips for installation and operation

• Use in panels that are designed for bolt-on Siemens breakers to ensure proper seating and electrical contact.
• Follow the panelboard manufacturer’s torque specifications for the mounting lugs to maintain a secure connection and optimal heat dissipation.
• Verify that the surrounding wiring and insulation are appropriate for 240V service and that the circuit load aligns with the 30A rating to avoid nuisance trips.
• If replacing an existing breaker, confirm the OEM compatibility to maintain consistent trip characteristics and coordinated protection with other devices in the same panel.

With the Siemens BQ2B030, you’re choosing a dependable, purpose-built solution for protecting 240V branch circuits across a range of environments. Its bolt-on, vibration-resistant design, paired with a reliable thermal-magnetic trip mechanism, makes it a practical, durable choice for both upgrades and new installations in panelboards and load centers.