Legrand TX3 MCB B16 1-Pole 10kA 230/400V 1 Module

Protecting electrical circuits from overloads and short circuits is critical in any residential or commercial installation. The Legrand TX3 miniature circuit breaker (MCB) B16 1-pole 10kA 230/400V 1 module offers reliable protection in a compact 1-module width, making it ideal for distribution boards where space is at a premium. With a rated current of 16 A and a tripping characteristic of type B, it is perfectly suited for protecting lighting circuits and socket outlets with moderate inrush currents.

Who is it for

This MCB is designed for electricians, panel builders, and maintenance professionals who need dependable circuit protection in residential, commercial, and light industrial settings. It is particularly well-suited for installations requiring compliance with IEC/EN 60898-1 standards and where DIN rail mounting is preferred.

Main features

• 1-pole design with 1 module width (17.7 mm) for space-saving installation
• Type B tripping characteristic: trips between 3 and 5 times rated current for fast response to short circuits
• Rated current 16 A, rated voltage 230/400 V AC, frequency 50/60 Hz
• Short-circuit breaking capacity (Icn) of 10 kA for robust protection
• Energy limiting class 3 ensures excellent current limitation, reducing let-through energy
• Screw terminals accept rigid conductors 1–25 mm² and flexible conductors 1–16 mm²
• IP40 enclosure protection and IP20 terminal protection for safe operation
• Wide operating temperature range from -25°C to +70°C
• Electrical endurance of 10,000 cycles for long service life
• Complies with IEC/EN 60898-1 standards

Specifications

• Brand: Legrand
• Series: TX3
• Model: 404084
• Product type: Miniature circuit breaker (MCB)
• Number of poles: 1
• Tripping characteristic: B
• Rated current: 16 A
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Short-circuit breaking capacity (Icn): 10 kA
• Energy limiting class: 3
• Mounting type: DIN rail
• Module width: 1 module (17.7 mm)
• Connection type: Screw terminals
• Terminal capacity (rigid): 1–25 mm²
• Terminal capacity (flexible): 1–16 mm²
• Degree of protection (enclosure): IP40
• Degree of protection (terminals): IP20
• Operating temperature: -25°C to +70°C
• Standards: IEC/EN 60898-1
• Electrical endurance: 10,000 cycles

Tips

When installing, ensure the MCB is properly seated on the DIN rail and that the terminals are torqued to the manufacturer's specifications. For circuits with high inrush currents (e.g., motors, transformers), consider a type C or D characteristic. Always verify the short-circuit current at the installation point does not exceed 10 kA.