Siemens Q340 40A 3P 240V Circuit Breaker, Plug-On | AmpState

Siemens Q340 40A 3P 240V circuit breaker — built for everyday electrical work, this plug-on protection device secures panelboards, load centers, and electrical distribution with reliable performance.

A smart pick for maintenance teams, panel builders, and spare inventories where a direct part-number match matters, the Q340 ensures quick, confident replacements.

• Amperage: 40 A
• Poles: 3
• Voltage: 240V
• Type: Circuit Breaker (Plug-On)
• Manufacturer: Siemens
• Part Number: Q340
• Applications: panelboards, load centers, electrical distribution
• Installation: plug-on for fast, tool-free swaps

Why this matters on the job - Direct part-number alignment minimizes guesswork during replacements, ensuring you match the exact Siemens design your system was built around. The plug-on format speeds field swaps, reduces downtime, and helps keep spare inventories lean by using a single, widely supported component across multiple panels.

Ideal for - maintenance crews servicing commercial buildings, electrical contractors assembling or upgrading panelboards, and facilities maintaining stock of common circuit protection parts.

What problems does it solve? - Eliminates misfit breakers, accelerates installation, and delivers reliable protection for critical circuits in 240V systems. When a panel requires a precise Siemens Q340 replacement, this part ensures compatibility without modifications.

Compatibility and support - If you’re unsure about fit, AmpState offers guidance to confirm compatibility and ensure you’re selecting the right part number (Q340) for your Siemens panel. Send a message to get help with matching and installation considerations.

Availability - This item is available from AmpState, ready to ship to keep your project on schedule.