Siemens HGB2B090B - 90 A, 600 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Introducing the Siemens HGB2B090B — a 90 A, 600 V, 2-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Sold through AmpState, this device combines rugged construction with precise protection to keep electrical systems safer and more dependable.

• Secure bolt-on mounting: a rigid connection to the bus minimizes vibration and movement, reducing the risk of loose contacts and intermittent trips in demanding environments.
• Thermal-magnetic trip unit: delivers stable, repeatable protection with a two-stage response — the thermal element handles gradual overloads with a controlled time delay, while the magnetic element responds instantly to high-energy short circuits for rapid interruption.
• Designed for Siemens OEM compatibility: specifically engineered to work with matching Siemens load centers and panelboards, ensuring proper fit, reliable trip coordination, and streamlined replacement in existing installations.
• Versatile application: ideal for residential panels, commercial distribution boards, and light industrial applications where dependable protection and straightforward installation are required.

What problems does this solve? When panel wiring carries sustained loads or experiences a fault, the HGB2B090B activates precisely where needed, preventing damage to conductors and equipment, reducing fire risk, and enabling safe, code-compliant shutoff during fault conditions. Its 2-pole design ensures simultaneous interruption of both hot conductors, preserving system integrity and personal safety during faults.

Key specifications at a glance:

• Manufacturer: Siemens
• Part Number: HGB2B090B
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 90 A
• Voltage Rating: 600 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for optimal use: verify panelboard compatibility with the Siemens OEM lineup, follow manufacturer torque recommendations during bolt-on installation to maintain a solid bus connection, and pair this breaker with corresponding Siemens devices to ensure coordinated protection across the distribution system.