Siemens QJ23B100 - 100 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the Siemens QJ23B100 — a 100 A, 240 V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and loadcenters. Available through AmpState, this unit is built to stand up to the demands of everyday electrical distribution while keeping your systems safe and compliant.

• Rigid, vibration-resistant mounting via secure bolt-on installation that maintains a low-resistance bus connection, reducing the risk of loosening and contact issues over time.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal overload sensing with instantaneous magnetic response for short-circuit events.
• OEM-compatible design engineered to pair with matching Siemens loadcenters and panelboards for seamless, trouble-free installation and dependable coordination.
• Versatile for multiple environments ideal for residential, commercial, and light industrial applications where reliable branch-circuit protection is essential.

Designed to safeguard circuits against overcurrent and short circuits, the QJ23B100 helps prevent component damage, electrical fires, and unnecessary downtime. Its 3-pole configuration makes it suitable for three-phase systems or multi-branch layouts that require coordinated protection across phases, while the bolt-on mounting simplifies field service and replacements without compromising connection integrity.

• Amperage rating: 100 A
• Voltage rating: 240 V
• Poles: 3
• Mounting style: Bolt-on
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection
• Manufacturer: Siemens
• Part number: QJ23B100

Whether you’re upgrading an aging panel, stocking service parts, or planning a commercial or light-industrial distribution project, the Siemens QJ23B100 delivers reliable protection with a straightforward, industry-standard form factor. Choose this breaker when you need a proven, OEM-compatible 3-pole solution that aligns with Siemens loadcenters and keeps your electrical system running smoothly.