Siemens B350 - 50 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens B350 — a 50A, 240V, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short‑circuit protection in panelboards and load centers.

Key advantages that set the B350 apart in real-world electrical assemblies:

• Secure bolt-on mounting for a rigid, vibration‑resistant bus connection that stays tight through operation and fault events.
• Thermal‑magnetic trip unit provides stable, repeatable protection—fast enough to interrupt short circuits and slow enough to tolerate normal inrush in three‑phase systems.
• Three-pole configuration supports 3‑phase panelboards and multi‑wire circuits, making it a natural fit for commercial and light industrial electrical distributions.
• OEM‑level compatibility designed to pair with matching Siemens OEM load centers and panelboards for streamlined upgrades and replacements.
• Versatile application suitable for residential, commercial, and light industrial environments where dependable protection is essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: B350
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 50A
• Voltage Rating: 240V
• Number of Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical scenarios

Ideal for panelboard and load center upgrades in environments where a secure, vibration‑resistant connection is critical. Use the Siemens B350 in three‑phase service panels, transformer-fed distribution, or main distribution sections within commercial spaces, as well as in light industrial panels where space is limited and reliability is paramount. Its bolt‑on design simplifies installation in fixed enclosures and ensures consistent contact pressure, which helps maintain protective coordination over time.

Why it matters for you: choosing a 3‑pole 50A breaker like the B350 means precise protection for each leg of a 240V distribution, reducing nuisance trips and protecting downstream wiring and equipment from overcurrent conditions. When paired with compatible OEM load centers, you get seamless performance, predictable trip behavior, and a durable solution tailored for Siemens systems.