2CCS571103R8577 ABB S401M-K50NP MCB 10 kA 1P+NP Type K 50 A

Why Choose the ABB S401M-K50NP Miniature Circuit Breaker?

The ABB S401M-K50NP is a high-performance miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in industrial and commercial electrical distribution systems. As part of the ABB SMISSLINE TP plug-in system, it combines a 50 A rated current, K tripping characteristic and protected neutral pole with convenient plug-in installation.

The S401M-K50NP is designed for circuits where increased starting or inrush currents can occur. Its K characteristic makes it particularly suitable for industrial loads such as motors, transformers and other inductive equipment, while the SMISSLINE plug-in format supports efficient installation and replacement within compatible distribution assemblies.

With a rated current of 50 A, a 1P+NP configuration and a 10 kA short-circuit breaking capacity, the S401M-K50NP provides robust protection for demanding electrical circuits. ABB order code 2CCS571103R8577 identifies this specific S400M configuration.

Key Advantages

• Reliable overload and short-circuit protection for electrical circuits.
• 50 A rated current for demanding industrial and commercial applications.
• K tripping characteristic suitable for circuits with increased starting currents.
• 1P+NP configuration with protected neutral pole.
• 10 kA short-circuit breaking capacity.
• Plug-in installation for the ABB SMISSLINE TP system.

Key Features

• ABB S400M / SMISSLINE TP series.
• 50 A nominal current.
• K tripping characteristic.
• 1P+NP pole configuration.
• Neutral conductor protected at 100% of the nominal pole current.
• 10 kA breaking capacity.
• Two-module device format.
• Designed for plug-in mounting within the SMISSLINE TP distribution system.
• Compact construction for modular electrical distribution assemblies.

Reliable Circuit Protection with SMISSLINE

Miniature circuit breakers such as the ABB S401M-K50NP automatically interrupt a circuit when excessive current occurs because of an overload or short circuit. This helps protect conductors, connected equipment and electrical distribution components from potentially damaging overcurrent conditions.

The ABB SMISSLINE TP system combines modular circuit protection with a convenient plug-in architecture for electrical distribution assemblies. The S401M-K50NP's K characteristic makes it particularly suitable for circuits containing loads with increased starting currents, while its protected neutral configuration provides overcurrent protection for both the phase and neutral conductors.

Typical Applications

• Industrial electrical distribution systems.
• Machine and automation control panels.
• Motor and transformer circuits.
• Circuits with inductive loads and increased starting currents.
• Commercial electrical installations.
• ABB SMISSLINE TP plug-in distribution assemblies.