Siemens HB3B015 - 15 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens HB3B015 is a 15A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable overcurrent and short-circuit protection for panelboards and load centers. Built to endure the demands of residential, commercial, and light industrial applications, it’s the installer’s reliable choice for coordinated, long-lasting protection.

• Bolt-on mounting: secure, vibration-resistant bus connection for a rigid, dependable link between breaker and panel, reducing the risk of loose connections over time.
• Thermal-magnetic trip unit: combines precise overload sensing with fast short-circuit interruption, delivering stable, repeatable protection across varying loads.
• Three-pole design: synchronized protection across all phases in 240V systems, simplifying wiring and improving trip coordination.
• OEM-compatible: engineered to fit matching Siemens OEM load centers and panelboards for straightforward replacement and consistent performance.
• Versatile suitability: ideal for a range of installations from home electrical panels to light commercial setups and small industrial circuits.

The HB3B015 specification in brief: 15A, 240V, 3-pole, bolt-on, thermal-magnetic molded case circuit breaker. It’s designed to interrupt current during overloads or short circuits, protecting wiring insulation and connected equipment while helping to maintain safe, compliant electrical systems.

Why this breaker matters for your panel

• Secure mounting minimizes vibration-induced wear and potential contact loosening, promoting consistent protection over time.
• Thermal-magnetic protection provides predictable performance for a variety of loads—from lighting circuits to small motor starts.
• Using a Siemens-approved combination with OEM load centers simplifies maintenance, sourcing, and panel servicing.

Ideal use cases

• Upgrading aging panelboards in retrofit projects where reliable 3-pole, 15A protection is required.
• Replacing a failed breaker in Siemens OEM panelboards to restore proper protection and coordination.
• Distributing circuits in residential or light commercial environments where 240V equipment and balanced three-phase considerations are present.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: HB3B015
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 15A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

For best results, pair the HB3B015 with matching Siemens panelboards or load centers to ensure optimal trip coordination and reliable protection. This 3-pole, 15A bolt-on breaker provides a robust, maintenance-friendly solution for maintaining safe, efficient electrical systems.