Legrand DX3 Miniature Circuit Breaker

Description

The Legrand 406009 is a high-performance 2-pole miniature circuit breaker (MCB) from the DX3 series. It is designed to provide dependable protection against short-circuits and overloads in electrical installations. With a D-curve tripping characteristic, it is particularly suitable for circuits with high inrush currents, such as those powering motors or transformers. This device ensures the safety and integrity of your electrical system.

Specifications

• Manufacturer: Legrand
• Part Number: 406009
• Series: DX3
• Number of Poles: 2-Pole (2P)
• Rated Current: 2 A
• Tripping Curve: D
• Rated Voltage (AC): 230/400 V
• Breaking Capacity: 10 kA according to IEC 60947-2
• Frequency: 50/60 Hz
• Mounting: DIN Rail

Label Info

• Brand: Legrand
• Model: DX3 D2
• Part Number: 406009
• Breaking Capacity: E6000 / 10kA

Application

This MCB is commonly used in commercial and industrial distribution boards for the protection of circuits with equipment that generates high starting currents, including motors, transformers, and specific types of lighting ballasts.

Country of Origin

Made in Italy.

CO2 Impact

Opting for a refurbished Legrand MCB saves an estimated 8.0 kg of CO2 compared to manufacturing a new one. This choice supports a circular economy and reduces industrial waste.

Availability

This item is a tested, used component in excellent working condition. Order now from PLC2Day for expert support and fast delivery.

FAQ

A D-curve breaker, like this one, is designed for high inrush current applications (e.g., motors, transformers) as it trips at 10 to 20 times the rated current. A C-curve breaker is more for general purpose loads (e.g., lighting, outlets) and trips at 5 to 10 times the rated current.

This breaker has a breaking capacity of 10 kA (kiloamperes) according to IEC 60947-2. This is the maximum fault current the breaker can safely interrupt without being destroyed. A higher breaking capacity is crucial for safety in industrial environments where potential fault currents are higher.

Yes, a 2-pole MCB is ideal for single-phase applications where both the phase (live) and neutral conductors need to be switched and protected simultaneously. This provides a complete isolation of the circuit for maintenance and safety.

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Last Update: Friday, March 13, 2026