Eaton LSHU-E40/3-KL 40A 3-Pole E-Characteristic Miniature Circuit Breaker 10kA

With a 10 kA rated switching capacity and energy limiting class 3, the Eaton LSHU-E40/3-KL delivers robust protection for demanding electrical installations. This 3-pole miniature circuit breaker (MCB) with E-characteristic is engineered for high inrush loads, ensuring reliable operation in industrial and commercial settings.

Overview

The Eaton LSHU-E40/3-KL is a 40 A, 3-pole MCB from the LSHU series, designed for DIN rail mounting. It features screw terminals with wide connection capacity (1–25 mm² solid, 1–16 mm² flexible) and complies with IEC/EN 60898-1. The breaker offers IP40 protection on the front and IP20 at terminals, with an operating temperature range of -25 to +55 °C.

What stands out

• E-characteristic trip curve handles high inrush currents without nuisance tripping
• 10 kA breaking capacity ensures safety under short-circuit conditions
• Energy limiting class 3 minimizes let-through energy, protecting downstream equipment
• High mechanical endurance of 20,000 cycles and electrical endurance of 10,000 cycles
• Wide terminal range accepts both solid and flexible conductors up to 25 mm²

Technical details

• Rated current: 40 A
• Number of poles: 3
• Tripping characteristic: E
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Rated switching capacity (Icn): 10 kA
• Rated impulse withstand voltage (Uimp): 4 kV
• Mounting: DIN rail
• Terminal type: screw terminals
• Terminal capacity: 1–25 mm² (solid), 1–16 mm² (flexible)
• Degree of protection: IP20 (terminals), IP40 (front)
• Operating temperature: -25 to +55 °C
• Standards: IEC/EN 60898-1
• Energy limiting class: 3
• Mechanical endurance: 20,000 cycles
• Electrical endurance: 10,000 cycles

Our verdict

The Eaton LSHU-E40/3-KL is a high-performance MCB for circuits with high inrush currents, such as motors, transformers, and lighting systems. Its 10 kA breaking capacity and energy limiting class 3 provide excellent protection, while the wide terminal range and robust construction ensure long-term reliability. A solid choice for professional electrical installations.