Siemens | BQ3B090HL | Circuit Breaker | 90A | 3-Pole | 240V

Meet the Siemens BQ3B090HL circuit breaker — a purpose-built 90A, 3-pole device designed for 240V systems. This model is a precise matching component for maintenance, retrofit, and replacement projects in compatible Siemens panels, delivering dependable protection when you need to keep your three-phase equipment running smoothly.

Key specifications

• Amperage: 90A
• Poles: 3-Pole
• Voltage: 240V
• Part number: BQ3B090HL
• Applications: maintenance, retrofit, and replacement in compatible Siemens panels

What makes the BQ3B090HL stand out

This Siemens circuit breaker is engineered to align with Siemens load centers and panel boards that require the BQ3B090HL form factor and trip characteristics. By choosing the exact part number, you ensure proper fit, reliable trip performance, and seamless integration with existing wiring and bus configurations. The three-pole configuration is ideal for balanced three-phase circuits, helping protect motors, compressors, and other three-phase equipment from overloads and short circuits.

Ideal use cases

• Replacing a failed breaker in a Siemens 240V, 3-phase panel
• Upgrading or retrofitting panels to support 90A three-phase loads
• Maintenance swaps during panel service or equipment modernization

Compatibility and installation notes

Before ordering, confirm fit and ratings to ensure compatibility with your specific panel model and bus arrangement. The part number is the best reference for compatibility, so keep BQ3B090HL handy when cross-checking schematics, panel labels, and replacement catalogs. If you’re planning a retrofit, verify that your wiring gauge and enclosure support a 90A, 3-pole, 240V protector to maintain proper system protection and performance.