Siemens BQ2B090H - 90 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Discover dependable, high-performance protection with the Siemens BQ2B090H — a 2-pole, 90A bolt-on molded case circuit breaker designed to guard your panelboards and load centers against overcurrent and short-circuit events. Built for stability in real-world installations, this breaker delivers reliable response in residential, commercial, and light industrial systems.

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact even in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance, quickly responding to overloads and short circuits while adapting to temperature changes.
• OEM-compatible design is tuned to work seamlessly with matching Siemens panelboards and loadcenters, ensuring proper fit, operation, and trip characteristics.
• Versatile protection ideal for protecting 240V circuits in a wide range of applications, from home electrical panels to light commercial and industrial feeders.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: BQ2B090H
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 90 A
• Voltage Rating: 240 V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Residential panels needing robust protection for large 240V circuits feeding equipment like heat pumps, water heaters, or subpanel feeders.
• Commercial installations where stable protection is required for 2-pole circuits powering pumps, compressors, or HVAC gear.
• Light industrial applications seeking a durable bolt-on solution that minimizes vibration-related contact issues and ensures reliable trip performance.

Why this Siemens breaker stands out

Unlike generic substitutes, the BQ2B090H is engineered for precise coordination with Siemens panel ecosystems. The bolt-on mounting method reduces movement and arcing risk over time, while the thermal-magnetic trip unit protects both against sustained overloads and sudden short-circuit events. This combination delivers predictable protection and easier maintenance in panelboards and load centers that are designed to work together, helping you avoid compatibility gaps and unexpected trips.

Installation and durability tips

• Ensure the panelboard is designed for bolt-on breakers to maintain proper contact integrity.
• Mount securely to preserve a solid bus connection and minimize vibration-induced wear.
• Use as a dedicated protection device for single zones or feeders in 240V circuits to maximize protection coverage and simplify fault tracing.

With the Siemens BQ2B090H, you’re choosing a trusted, purpose-built solution for dependable branch circuit protection. It’s the practical, durable choice for keeping your electrical system safe and performing as intended—today, tomorrow, and for years to come.