Siemens | NGB3B090 | Circuit Breaker | 90A | 3-Pole | 600V | Bolt-On

Meet the Siemens NGB3B090 circuit breaker—a robust, three-pole protection device built for demanding, three-phase power systems. With a 90A rating and a 600V maximum, this bolt-on breaker is designed for secure mounting in compatible panels, making it an ideal choice for maintenance, retrofit, and replacement projects where exact specifications matter.

Key specifications

• Part number: NGB3B090
• Amperage: 90A
• Poles: 3-Pole (three-phase)
• Voltage rating: 600V
• Mounting: Bolt-On

Why this matters

In electrical rooms and equipment enclosures, a precise, bolt-on Siemens circuit breaker like the NGB3B090 provides dependable fault isolation for all three phases. The 3-pole configuration helps maintain balanced protection across the system, while the 600V rating accommodates demanding commercial or light industrial applications. This is especially beneficial during panel retrofits or service upgrades where matching legacy specs is critical.

Compatibility and installation tips

• Best reference for compatibility: the part number NGB3B090. Always verify fit and ratings against your panel’s specifications before ordering.
• Designed for bolt-on mounting in compatible Siemens panels and enclosures.
• Ensure proper mounting hardware and enclosure support to maintain secure seating and reliable trip performance.

Ideal for

Electrical contractors, facility managers, and maintenance technicians who need a precise, reliable 3-pole protection device for 3-phase systems up to 600V will find the NGB3B090 well-suited for retrofit, replacement, or new installations where Siemens compatibility is required.