Siemens QJH23B090 - 90 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Siemens QJH23B090 is a 3-pole, 90A, 240V bolt-on molded case circuit breaker designed to shield your electrical system from overcurrents and short circuits. Built for panelboards and load centers, it delivers reliable, predictable protection where it matters most.

• Secure bolt-on mounting: provides a rigid, vibration-resistant connection to the bus, helping maintain consistent protection even in high-activity panels.
• Thermal-magnetic trip unit: combines thermal overload protection with instantaneous magnetic tripping for short circuits, delivering stable, repeatable protection response.
• OEM-compatible: designed to fit Siemens-appropriate load centers and panelboards, ensuring proper mechanical and electrical integration.
• Versatile for multiple environments: suitable for residential, commercial, and light industrial applications.

Technical snapshot: 90A current rating, 240V voltage, 3 poles, bolt-on mounting. Part number QJH23B090. Type: thermal-magnetic molded case circuit breaker. Manufacturer: Siemens.

Why this breaker stands out for your panel

When your electrical system runs motors, lighting, and outlets in concert, you need a breaker that responds precisely when needed without unnecessary trips. The QJH23B090’s thermal-magnetic design detects overloads with a controlled thermal response and delivers a swift magnetic trip for short circuits, protecting conductors and equipment while simplifying maintenance.

Ideal use cases:

• Residential service panels handling balanced 3-phase loads or multi-wire branch circuits in hybrid commercial settings.
• Commercial and light-industrial distribution where reliable 3-pole protection manages 3-phase feeders.
• Panelboard upgrades or replacements requiring Siemens OEM compatibility to maintain system warranty and performance.

Practical tips for best results:

• Pair this 90A, 240V unit with compatible Siemens load centers to preserve trip characteristics and ensure confident, uniform protection.
• Always follow safety protocols when installing: disconnect power, use proper tools, and secure mounting hardware to maintain a sturdy bus connection.
• Choose this breaker when you want predictable protection that reduces nuisance trips and safeguards sensitive equipment in mixed-use environments.