Legrand 409282 circuit breaker 3-pole C-curve 125A 10/16kA AC DX3

The Legrand 409282 circuit breaker is a reliable 3-pole electrical protection device featuring a C-curve trip characteristic and a 125A rated current. Designed for industrial and commercial power distribution applications, it provides dependable overload and short-circuit protection with a breaking capacity of 10/16kA for alternating current systems.

Advantages

This circuit breaker ensures high operational safety and reliability in demanding electrical installations. The robust 3-pole design allows for simultaneous disconnection of three phases, making it an essential component for balanced power networks. Its C-curve characteristic offers optimal responsiveness to standard inductive loads, preventing nuisance tripping while protecting wiring from overloads and short circuits.

Suitable for

• Industrial power distribution boards
• Commercial electrical installations
• Protection of three-phase alternating current systems
• Safeguarding heavy-duty equipment with standard inrush currents

When it may not be suitable

This device is not designed for residential sub-panels requiring lower amperage ratings or single-phase household circuits. It may also be unsuitable for highly specialized applications requiring different trip curves, such as sensitive electronic equipment needing B-curve protection or heavy motor loads requiring D-curve characteristics.

Key specifications

• 3-pole configuration
• C-curve trip characteristic
• 125A rated current
• 10/16kA breaking capacity
• Designed for AC systems
• Package dimensions: 112 mm width, 86 mm depth, 108 mm height

How to use

The device must be installed by a qualified electrician within a compatible electrical enclosure or distribution board. Ensure that the main power supply is completely switched off before mounting the circuit breaker onto the standard DIN rail. Connect the incoming and outgoing cables securely to the appropriate terminals, verifying that the tightening torque matches the manufacturer guidelines to prevent loose connections and potential overheating.

What to consider before purchase

• Verify that the 125A rated current matches your electrical load requirements
• Ensure compatibility with your existing distribution board and DIN rail mounting space
• Check that the breaking capacity of 10/16kA is adequate for your prospective short-circuit current levels

Usage recommendations: Regularly inspect the circuit breaker and surrounding wiring for signs of wear, discoloration, or loose terminals. Periodic testing of the tripping mechanism by qualified personnel helps ensure continued operational safety and reliability within your electrical distribution network.