Circuit breaker Legrand 021604 — single-pole miniature protection device, pack of 1

Legrand 021604 is a single-pole miniature circuit breaker supplied as a single unit per pack. Designed for installation in standard DIN-rail distribution boards, this compact protection device provides reliable overcurrent and short-circuit protection for residential and light commercial electrical circuits. It is intended to safeguard wiring and connected equipment by interrupting fault currents and preventing damage caused by overloads or short circuits.

Advantages

The single-pole configuration allows straightforward protection of individual phase circuits while the compact six-module form factor conserves space in distribution panels. The breaker is built to industry standards for electrical protection and offers a simple connection scheme suitable for common installation practices. Its design supports consistent tripping characteristics to ensure circuit isolation under fault conditions.

Suitable for

• Protecting lighting and power circuits in homes
• Overcurrent protection for small office or light commercial installations
• Use in standard DIN-rail consumer units and distribution boards
• Retrofitting or replacing a single-pole breaker in existing panels

Key specifications

• Poles: single-pole (1P)
• Modules: 6-module width for DIN-rail mounting
• Connection capacity: accepts conductors up to 50 mm²
• Functional protection: designed for overcurrent and short-circuit interruption
• Application: suitable for residential and light commercial circuits

How to use

Install the breaker onto a compatible DIN-rail inside the distribution board and secure it according to standard electrical installation procedures. Connect the line conductor to the breaker input and the load conductor to the output, ensuring conductors are sized appropriately for the circuit and tightened to the manufacturer-recommended torque. Verify correct orientation and clearances, then restore power and test the circuit to confirm the breaker trips under simulated fault conditions if required. All work must be carried out by a qualified electrician following local regulations and safety standards.

Usage recommendations

Select the breaker rating and tripping curve that match the circuit load and coordination requirements. Periodically inspect terminals for secure connections and signs of overheating. For installations with high fault currents or specific selective protection needs, coordinate with upstream and downstream devices to achieve proper discrimination.