Legrand S301 DX3 Miniature Circuit Breaker 1P 4A C-Curve 6kA

The Legrand S301 DX3 Miniature Circuit Breaker is a high-quality, single-pole protective device engineered to safeguard electrical circuits against overloads and short circuits. Designed for seamless integration into modular distribution boards, this 4A circuit breaker provides reliable performance in both residential and commercial environments. Its robust construction and precise C-curve tripping characteristic ensure that electrical systems remain protected while maintaining operational continuity.

Advantages

This circuit breaker offers exceptional reliability due to its advanced internal mechanism, which is designed to handle frequent switching operations without compromising safety. The 6kA breaking capacity provides a sufficient safety margin for standard electrical installations, effectively interrupting fault currents before they can cause damage to wiring or connected appliances. Its compact, modular design allows for easy installation on standard DIN rails, making it a versatile choice for modern electrical panels.

Suitable for

• Residential electrical distribution boards
• Commercial office power circuits
• Protection of lighting systems
• Control circuits requiring low-amperage protection

This device may not be suitable for high-inrush current applications, such as large industrial motors or heavy-duty machinery, where a different tripping curve might be required. It is also not intended for use in environments with extreme moisture or corrosive atmospheres without appropriate protective enclosures.

Key specifications

• Rated current: 4A
• Number of poles: 1P
• Tripping characteristic: C-curve
• Breaking capacity: 6kA
• Mounting type: DIN rail

Installation should be performed by a qualified electrician in accordance with local electrical regulations. The device is mounted by snapping it onto a standard 35mm DIN rail within a distribution enclosure. Ensure that the supply wires are correctly terminated into the terminals and tightened to the manufacturer's specified torque to prevent loose connections and overheating.

What to consider before purchase

• Verify that the 4A rating matches the load requirements of your circuit.
• Ensure the C-curve characteristic is appropriate for the specific equipment being protected.
• Check the available space in your distribution board for a single-module device.
• Confirm compatibility with existing DIN rail systems.

For optimal performance and safety, regularly inspect the circuit breaker for signs of physical damage or discoloration and ensure that all terminal connections remain tight during periodic maintenance checks.