Siemens QR23B125L 125A 3P Circuit Breaker, Bolt-On | AmpState

The Siemens QR23B125L is a robust 3-pole, 125-amp circuit breaker designed to deliver reliable protection for panelboards, load centers, and electrical distribution systems. Built to support replacement projects and spare stocking, this bolt-on device helps you maintain exact BOM alignment with the original Siemens part number, reducing guesswork and ensuring fit‑for‑purpose protection.

What sets the QR23B125L apart

• 3-pole, 125 A protection—provides coordinated overcurrent protection for three independent circuit paths, ideal for main or feeder duties in commercial and light industrial environments.
• Bolt-on mounting—offers solid, secure installation and dependable bus-bar continuity in demanding electrical distributions.
• Exact part integrity—part number QR23B125L ensures compatibility within the Siemens QR series and keeps your BOM aligned with the original equipment.
• Siemens quality—a trusted choice for longevity, consistent performance, and familiar field service procedures.
• Perfect for replacements and spares—minimize downtime by stocking the precise device that matches your existing panelboards and load centers.

Where you’ll use it

• Panelboards and load centers in commercial buildings, factories, and data centers requiring reliable circuit protection.
• Electrical distribution systems that demand straightforward bolt-on installation and compatibility with the Siemens QR family.
• Replacement projects where maintaining original part numbers matters for service history and documentation.

Why this matters for your project

• Downtime reduction: rapid replacement with an exact BOM-compliant part minimizes project delays.
• Consistent protection strategy: matches the protection scheme originally specified for your Siemens panel infrastructure.
• Easy sourcing: availability through AmpState ensures you can procure the QR23B125L when you need it, without guesswork.

Key specifications at a glance

• Manufacturer: Siemens
• Part number: QR23B125L
• Type: Circuit Breaker
• Current rating: 125 A
• Poles: 3
• Mounting: Bolt-On

Designed for electricians and facilities teams who value precise compatibility, dependable protection, and streamlined maintenance, the Siemens QR23B125L bolt-on circuit breaker is a practical, now-ready solution for safeguarding electrical distribution while preserving your original hardware lineage.