Siemens | QJ23B090 | Circuit Breaker | 90A | 3-Pole | 240V | 10kA | Bolt-On

Siemens QJ23B090 Circuit Breaker — a robust, bolt-on solution designed for reliable protection in commercial and industrial electrical systems. With 3 poles, a 90 Amp rating, and a 240V operating voltage, this breaker is built to handle demanding loads while delivering precise overcurrent protection. Its 10kA interrupting capacity means it can safely interrupt faults with high fault current, helping protect wiring and equipment in demanding environments. Key specifications - Amperage: 90A - Poles: 3-Pole - Voltage: 240V - Interrupting capacity: 10kA - Mounting: Bolt-On - Part number: QJ23B090 - Intended use: maintenance, retrofit, and replacement where exact specs are required Why this Siemens breaker stands out - Exact-fit compatibility: The QJ23B090 is the precise part number to reference when matching panels or retrofitting existing installations. Always confirm fit and ratings before ordering to ensure seamless integration with your Siemens or Siemens-compatible distribution system. - Secure bolt-on mounting: The bolt-on design provides a solid, vibration- and shock-resistant connection, which is particularly valuable in environments with equipment that experiences frequent cycling or vibration. - Three-pole configuration for balanced protection: Ideal for three-phase electrical systems, this breaker protects your downstream circuits evenly and simplifies coordination with upstream protection. Who it’s ideal for - Electricians and facility managers performing panel upgrades, retrofits, or replacements in commercial or light industrial settings. - Technicians maintaining Siemens-compatible electrical distributions where a 90A, 3-pole, 240V breaker with a 10kA interrupting rating is required. - Projects where precise part matching is essential to ensure optimal protection and compatibility with existing gear. Practical considerations and use cases - Retrofit projects: If you’re upgrading older equipment or reconfiguring a panel to support new loads, the QJ23B090’s 90A rating and bolt-on mounting simplify installation while preserving protective coordination. - Replacement scenarios: When replacing a failed breaker with an identical spec unit, using the QJ23B090 ensures the same trip characteristics and interrupting capacity, maintaining system safety and performance. - Installation tips: Before ordering, verify that the panel domain accepts a 3-pole, bolt-on breaker with 240V rating and 10kA interrupting capacity. The part number is your most reliable reference for compatibility. Summary The Siemens QJ23B090 is a purpose-built, bolt-on circuit breaker that delivers dependable 90A, 240V, 3-pole protection with a strong 10kA interrupting rating. It’s tailored for maintenance, retrofit, and replacement tasks where exact specs matter, making it a practical choice for professionals who value precise compatibility and durable performance in Siemens-compatible electrical systems.