Siemens QJH23B175 175 Amp 240 Volt 3-Pole Circuit Breaker

Siemens QJH23B175 is a robust, high-current solution designed to safeguard your electrical system with precise, dependable protection. This 175 A, 240 V, 3-pole bolt-on molded case circuit breaker is built for reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers, making it ideal for residential setups, commercial applications, and light industrial environments. Key advantages that set this breaker apart

• Secure bolt-on mounting for a rigid, vibration-resistant bus connection that stays locked in even in demanding environments.
• Thermal-magnetic trip unit delivers stable, repeatable protection performance against both overloads and short circuits.
• 3-pole design provides balanced protection across three phases, essential for modern 240 V systems and three-phase equipment.
• OEM compatibility with matching Siemens panelboards and loadcenters, ensuring a seamless, reliable fit in existing configurations.
• Versatile across sectors suitable for residential, commercial, and light industrial installations where dependable protection is a must.

Who should consider this breaker?

• Electrical professionals upgrading or expanding panelboards that require a 175 A, 3-pole bolt-on solution.
• Facility managers seeking durable protection for feeders and distribution circuits in commercial spaces.
• contractors tackling retrofit projects where bolt-on mounting reduces panel downtime and preserves bus integrity.

Typical applications and use cases

• Protection for three-phase distribution circuits in panelboards and load centers up to 240 V.
• Feeder protection for commercial lighting systems, HVAC equipment, and controlled motor loads.
• New installations in residential or light industrial settings where rugged, vibration-resistant mounting is advantageous.

Technical snapshot

• Manufacturer: Siemens
• Part Number: QJH23B175
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 175 A
• Voltage Rating: 240 V
• Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical guidance for installation and equivalence

This Siemens QJH23B175 pairs with matching OEM loadcenters and panelboards, delivering a cohesive protection solution across your electrical distribution. For best results, ensure the bolt-on connection to the bus is secured per panel manufacturer guidelines to maintain a solid, vibration-resistant interface. The thermal-magnetic trip mechanism provides dependable response: it initiates a trip quickly on short circuits and maintains stable protection during normal loading, reducing nuisance trips and safeguarding connected equipment.

Why choose this Siemens breaker

When your project demands a dependable, industry-standard 3-pole breaker with a secure mounting method and compatible OEM integration, the QJH23B175 delivers. Its combination of rugged bolt-on installation, a thermal-magnetic trip unit, and 3-phase protection makes it a thoughtful, future-proof choice for panel upgrades, new constructions, and routine maintenance in residential, commercial, and light industrial applications.

Available through AmpState, the Siemens QJH23B175 is the trusted option for reliable, code-compliant overcurrent and short-circuit protection in your electrical infrastructure.