Siemens B320HH - 20 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens B320HH, a purpose-built 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. With a 20-amp rating at 240 volts, it’s built to handle mid-range residential, commercial, and light industrial circuits with confidence.

Why the Siemens B320HH stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection. In active service environments—where panels endure vibration or movement—the B320HH stays firmly in place, reducing the risk of loose connections and intermittent trips.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance. The thermal element responds to gradual overloads, while the magnetic element sharply interrupts high-energy faults, resulting in reliable protection with predictable trip behavior.
• OEM-compatible design is engineered to pair with matching Siemens OEM load centers and panelboards, helping you maintain a cohesive, dependable electrical system when upgrading or upgrading existing panels.
• Versatile installation profile suits residential, commercial, and light industrial applications, making it a flexible choice for service panels, distribution boards, and retrofit projects.

What problems this breaker solves

• Prevents overcurrent and short-circuit damage in branch circuits by tripping at precise thresholds, protecting wiring and connected devices.
• Minimizes panel downtime with fast, predictable responses to faults, helping maintain safer, more reliable electrical systems.
• Offers a sturdy mounting solution that remains secure in environments subject to vibration or movement, reducing maintenance and inspection concerns.

Ideal use cases

• Residential subpanels and main distribution panels requiring reliable 20A protection for multiple circuits.
• Commercial lighting or receptacle circuits in small to mid-size spaces where panel reliability matters.
• Light industrial control panels where robust mounting and consistent protection are critical.

Technical specifications at a glance

• Manufacturer: Siemens
• Part Number: B320HH
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 20A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Choosing the Siemens B320HH means opting for a proven, purpose-built solution that prioritizes secure installation, precise protection, and compatibility with Siemens panel ecosystems. It’s the practical, reliable choice for electricians and facility managers who demand consistent performance in everyday electrical layouts.