Siemens | JD3B350 | Circuit Breaker | 350A | 3-Pole | 240V | Bolt-On

Meet the Siemens JD3B350 circuit breaker — a rugged, bolt-on protection device engineered for demanding industrial and commercial applications. Delivering 350A of current on a 3-pole configuration, this unit provides reliable overcurrent protection for essential feeders in 240V systems. Built for maintenance, retrofit, and replacement, it’s a dependable choice when panel compatibility and performance matter most.

• Amperage: 350 A
• Poles: 3-Pole
• Voltage: 240 V
• Mounting: Bolt-On
• Reference: JD3B350 is the best compatibility indicator
• Best applications: Maintenance, retrofit, or replacement in compatible Siemens panels

Why this matters for your operation: the JD3B350 is purpose-built for panels designed to accommodate JD3B bolt-on breakers. Using the exact part number as your compatibility reference helps ensure proper bus connections, mounting fit, and electrical characteristics, delivering a smoother installation and minimizing downtime during upgrades or servicing.

Ideal use scenarios include facility upgrades, spare-parts readiness for aging bolt-on families, and retrofit projects where a 350A, 3-pole solution is required in a 240V system. Whether you’re refreshing a critical feeder or replacing a failed unit, this breaker maintains the protection scheme you rely on in high-demand environments.

Compatibility and installation notes:

• Before ordering, confirm that your panel accepts bolt-on JD3B-style breakers and that a JD3B350 reference matches the panel’s requirements.
• Use this unit when you need a direct, drop-in replacement or retrofit for 350A service with 240V capability in compatible Siemens lineups.
• Record the part number as your primary compatibility reference to avoid mismatches with other JD3B variants.

Choose with confidence: Siemens engineering delivers consistent mechanical fit, reliable electrical performance, and long-term availability for the JD3B bolt-on family. The JD3B350 is more than a rating — it’s a practical, proven solution for safeguarding high-capacity circuits in busy, load-heavy environments.