Circuit Breaker Legrand LE-419203 Single-Phase 20 A Type C

Legrand LE-419203 Single-Phase 20 A Type C is a modular DIN-rail circuit breaker designed for single-phase electrical installations. It provides overcurrent protection for lighting circuits, socket outlets and small appliances in residential and light commercial environments. The device combines a compact form factor with a Type C magnetic curve to allow for moderate inrush currents while still protecting conductors and equipment from overloads and short circuits.

Advantages

This circuit breaker offers reliable thermal-magnetic protection suited to general-purpose circuits where transient currents from motors or LED drivers can occur. Its modular DIN-rail design enables easy integration into standard distribution boards, and the Type C characteristic permits higher trip thresholds for short-duration inrush without sacrificing safety. The unit is suitable for single-phase systems and provides clear manual operation for switching and resetting after a trip.

Suitable for

• Protection of lighting circuits in homes and small commercial premises
• Protection of socket outlets and general-purpose circuits
• Circuits feeding small motors, pumps or HVAC components with moderate starting currents
• Retrofit or new installations in DIN-rail distribution panels

Key specifications

• Rated current: 20 A
• Poles: single-phase (single pole)
• Tripping characteristic: Type C (thermal-magnetic)
• Mounting: DIN-rail compatible modular housing
• Application: overcurrent and short-circuit protection for lighting, sockets and small appliances
• Operation: manual switching and automatic trip/reset functionality

How to use

Install the circuit breaker into a standard DIN-rail distribution board following local electrical regulations and the system’s wiring diagram. Connect the phase conductor to the breaker’s input terminal and the load conductor to the output terminal, ensuring secure tightening of terminals and proper conductor sizing for 20 A operation. Verify correct polarity and ensure the neutral and protective earth connections in the panel are made separately. After installation, switch on the breaker manually and test the protected circuit under controlled conditions. If the breaker trips repeatedly, investigate for overloads, short circuits or inappropriate downstream equipment before resetting.

Usage recommendations

Use this Type C 20 A breaker where moderate inrush currents are expected, such as small motor loads or LED driver circuits. Ensure conductor cross-sections, upstream and downstream protective devices, and earthing meet applicable standards. Do not exceed the rated current and replace the device if it shows signs of mechanical damage or repeated nuisance tripping pending a fault investigation.