Siemens QJ22B090 - 90 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens QJ22B090 90A, 240V, 2-Pole Bolt-On Molded Case Circuit Breaker—the dependable protection you need for panelboards and load centers, now from AmpState. Built to safeguard branch circuits from overcurrent and short-circuit events, this unit delivers solid performance where it matters most.

Why this breaker stands out

• Secure bolt-on mounting: engineered for a rigid, vibration-resistant connection to the bus, helping prevent loose contacts that can lead to nuisance trips or degraded protection.
• Thermal-magnetic trip unit: combines thermal overload sensing with magnetic short-circuit protection for stable, repeatable response across a wide range of fault conditions.
• OEM compatibility: designed to pair seamlessly with Siemens OEM load centers and panelboards, ensuring reliable integration with your existing electrical system.
• Versatile, 2-pole design: 90A amperage at 240V provides solid protection for 2-pole circuits in residential, commercial, and light industrial applications.

Technical snapshot

• Manufacturer: Siemens
• Part Number: QJ22B090
• Type: Thermal-magnetic molded case circuit breaker (MCCB)
• Amperage Rating: 90A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use scenarios

• Residential panelboards and subpanels needing reliable 90A protection for critical feeders or large circuits
• Commercial electrical rooms where vibration and equipment operation demand a secure, vibration-resistant connection
• Light industrial panels that require robust, repeatable protection against overloads and short circuits

Practical guidance for installation and performance

• Verify panelboard compatibility with Siemens QJ22B090 to ensure seamless fit and electrical continuity.
• Use proper bolt torque as specified by Siemens for a secure bolt-on connection and optimal bus contact.
• Leverage the thermal-magnetic protection to minimize nuisance trips on everyday load fluctuations while still delivering fast short-circuit clearing when faults occur.
• Consider this unit for upgrading aging or undersized protection in panelboards and load centers that rely on solid, OEM-grade components.

Whether you’re upgrading a residential service or outfitting a light commercial panel, the Siemens QJ22B090 delivers dependable, easy-to-integrate protection with a focus on longevity and reliability. Trusted configuration, precise protection, and a bolt-on design that resists vibration—all from AmpState. Add this 2-pole 90A 240V breaker to your panel today and safeguard your circuits with confidence.