Mersen A4BT400 400A 600 V fusible de acción retardada Clase L

Mersen lists A4BT400 in the A4BT Series as a 400A circuit-protection device. The published rating combines 600V AC / 500V DC operation and 200kA AC / 100kA DC short-circuit capability. The protection profile emphasizes 10-second time delay at 500% rating for large motors and high-inrush loads. Mechanically, it follows the Class L form factor and blade terminal style for clip-mounted fuse installations. Typical selection contexts include Motors, Motor Controllers, Transformers. For design release, confirm coordination, dimensions and approval details in the official Mersen documentation.