Circuit breaker Legrand 403355 — 1-pole, 10 A, 230 V

Single-pole circuit breaker Legrand 403355 rated 10 A at 230 V provides overcurrent protection for individual phase conductors in residential and light commercial electrical installations. Designed for DIN-rail mounting in distribution boards and consumer units, this 1-pole device detects overloads and short circuits and interrupts the circuit to protect wiring and connected equipment. The compact form factor and standard rail clip allow straightforward installation and integration with other modular protective devices.

Advantages

This Legrand circuit breaker offers precise tripping characteristics for a 10 A rating at 230 V, ensuring consistent protection against overload and short-circuit conditions. Its single-pole design conserves panel space while providing reliable switching and fault interruption. The breaker is engineered to meet industry safety standards and is suitable for coordinated use with other protective and switching devices in a consumer unit. Its construction favors durability and stable performance over repeated operations.

Suitable for

• Protection of lighting circuits in residential buildings
• Protection of socket circuits with low current demand
• Branch circuit protection in small commercial installations
• Replacement of a single-pole 10 A protective device in existing distribution boards

Key specifications

• Poles: 1 (single-pole)
• Rated current: 10 A
• Rated voltage: 230 V AC
• Mounting: DIN-rail (standard rail clip)
• Function: thermal-magnetic overcurrent protection (overload and short-circuit tripping)
• Form factor: modular, suitable for consumer units and distribution boards

How to use

Mount the breaker on a compatible DIN-rail inside the consumer unit or distribution board and connect the phase conductor to the line terminal and the load conductor to the load terminal, following local wiring regulations. Ensure supply is isolated before installation or replacement. After tightening terminals to the recommended torque and confirming secure mounting, restore supply and test the breaker by operating the toggle to verify manual switching and visual indication. Use appropriate protective equipment and consult a qualified electrician if unsure about installation or local code compliance.

Usage recommendations

Use this single-pole 10 A breaker for circuits with expected continuous currents below the rated value and where coordinated protection with downstream devices is required. Avoid installing in environments with excessive humidity, corrosive atmospheres, or temperatures outside the device's specified range. Periodically inspect connections for tightness and signs of overheating and replace the breaker if it exhibits mechanical damage or fails testing.