Siemens Q245 - 45 A, 240 V, 2-Pole Plug-In Circuit Breaker | AmpState

Siemens Q245 is a 45A, 240V, 2-pole plug-in molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for fast, confident service, this unit helps you safeguard electrical systems with precision and ease.

Why choose the Siemens Q245

• Fast plug-in connection for quick installation and effortless replacement, minimizing downtime during upgrades or servicing.
• Thermal-magnetic trip unit provides stable, repeatable protection across a wide range of fault currents, helping prevent nuisance trips and improving circuit reliability.
• OEM-compatible design engineered to be compatible with matching Siemens OEM load centers and panelboards for a cohesive, dependable fit.
• Versatile for multiple environments ideal for residential, commercial, and light industrial electrical layouts where dependable 240V protection is required.

Technical snapshot

• Manufacturer: Siemens
• Part Number: Q245
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 45A
• Voltage Rating: 240V
• Number of Poles: 2
• Mounting Style: Plug-in
• Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical applications

• Protect 240V branch circuits in residential subpanels and main panels where a quick plug-in replacement is advantageous.
• Upgrade older systems to a reliable 2-pole protection that ensures simultaneous disconnection on both hot lines, enhancing safety in multi-wire branch circuits.
• Integrate with Siemens panelboards and load centers to maintain consistent protection characteristics across your electrical distribution system.
• Ideal for retrofit projects, new installations, or any scenario requiring a compact, plug-in molded case breaker with dependable thermal-magnetic protection.

Installation tips and practical considerations

• Ensure the panelboard or load center is designed to accept plug-in Siemens breakers of the Q-series family for proper fit and performance.
• Torque terminals to manufacturer guidelines to maintain secure connections and reliable current transfer.
• When replacing an older breaker, verify the existing fault-current levels and wiring configuration to confirm a 2-pole 45A 240V unit meets the circuit’s protection needs.

With the Siemens Q245, you gain a compact, dependable solution that simplifies installation, enhances safety, and aligns with Siemens’ trusted load centers. Whether you’re refining a residential panel or equipping a light industrial distribution board, this 45A, 240V, 2-pole plug-in breaker provides precise protection where it matters most.