Eaton Cutler-Hammer CH340 40A 3P 240V Circuit Breaker, Type CH, Plug-On | AmpState

Eaton Cutler-Hammer CH340 is a 40A, 3-pole, 240V circuit breaker designed for reliable overcurrent protection in panelboards, load centers, and electrical distribution systems. Built as a Type CH plug-on breaker, it’s the practical choice for retrofit work and maintenance planning where keeping a consistent part number matters for stocking and service history.

Why CH340 fits CH-series installations

Engineered to complement CH-type panels, this plug-on breaker installs quickly onto compatible bus stabs, delivering secure, tool-friendly mounting and dependable circuit protection. The 3-pole configuration provides coordinated protection for multi-wire branch circuits, while the 40A rating accommodates lighting, motor, and general-purpose circuits within the CH-series design envelope.

• Type CH Plug-On: fast, secure installation with minimal panel downtime.
• 40 A, 3 Poles, 240V: precise protection for multi-wire circuits in commercial, industrial, and residential applications.
• Part Number CH340: standardized handle with Eaton Cutler-Hammer reliability for consistent replacements.
• Panel and Load Center Compatibility: ideal for retrofits and upgrades where CH-series components are specified.
• Maintenance Planning: helps keep spare parts inventory organized when the exact CH part number is required.

Practical use cases

• Retrofit projects in existing CH-series panelboards where a 40A, 3-pole, 240V protection device is specified.
• Replacement for a failed or tripped CH-style breaker in maintenance programs that rely on a consistent part number.
• New installations or expansions that mandate a plug-on CH-type breaker for straightforward serviceability and future replacements.

Installation and safety considerations

• Power off the panel and verify absence of voltage before handling.
• Insert the CH340 onto compatible CH-series bus stabs until it seats firmly and securely.
• Label the circuit clearly and ensure the surrounding panel area is clean and access is unobstructed.

Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit. The CH340 is available from AmpState, a dependable source for CH-series protection devices, ensuring you have the right component when you need it.