Circuit Breaker Legrand LE-419171 three-phase 25 A Type B

The Circuit Breaker Legrand LE-419171 three-phase 25 A Type B is a compact protective device designed for three-phase electrical installations. It provides overcurrent and short-circuit protection with a Type B tripping characteristic and a rated current of 25 A, making it suitable for protecting distribution circuits in residential and light commercial settings. The breaker is intended for installation in standard DIN-rail distribution boards and delivers selective fault clearing for lighting, motor protection with low inrush, and general-purpose circuits.

Advantages

This three-phase breaker combines a clear rated current and defined Type B sensitivity to ensure predictable tripping behavior under overloads and short circuits. Its compact form factor allows efficient use of space in distribution panels, while the three-pole design ensures simultaneous disconnection of all phases for safer maintenance. Constructed to meet industry standards for electrical protection, it supports reliable operation in mixed-load environments including lighting, small motors and socket circuits.

Suitable for

• Residential three-phase distribution boards
• Small commercial electrical panels
• Protection of lighting and socket circuits
• Protection of small motors and equipment with low inrush currents

Key specifications

• Number of poles: three-pole (three-phase)
• Rated current: 25 A
• Tripping characteristic: Type B (standard instantaneous trip suited for low inrush loads)
• Function: overcurrent and short-circuit protection
• Mounting: DIN-rail compatible housing for distribution boards
• Application environment: residential and light commercial installations

How to use

Install the three-pole breaker in the distribution board on a compatible DIN rail, ensuring correct orientation and secure mechanical engagement. Connect the three phase conductors to the input terminals and the load conductors to the output terminals, following local wiring regulations and observing torque recommendations for terminal screws. Use the breaker to protect branch circuits rated at 25 A total per phase; verify coordination with upstream and downstream protection devices before applying full operational voltage. Perform insulation and continuity checks and energize the circuit while monitoring for correct operation and absence of nuisance trips.

Usage recommendations

Select Type B characteristic when protecting circuits with primarily resistive loads and low inrush currents, such as general lighting and most socket outlets. For installations with high motor inrush or inductive loads, evaluate whether a Type C or D characteristic is more appropriate to reduce unwanted tripping. Ensure periodic visual inspection and thermal checks at terminals as part of routine electrical maintenance.