2CCS561001R1028 ABB S401M-UCZ2 MCB 1P Type Z 2 A AC/DC

Why Choose the ABB S401M-UCZ2 DC Miniature Circuit Breaker?

The ABB S401M-UCZ2 is a high-performance single-pole miniature circuit breaker (MCB) developed for DC and AC circuit protection within the ABB SMISSLINE TP plug-in distribution system. With a 2 A rated current and sensitive Type Z tripping characteristic, it provides reliable overload and short-circuit protection for control, electronic and other low-current electrical circuits.

As part of the ABB S400M-UC series, the S401M-UCZ2 combines flexible AC/DC operation with the installation advantages of ABB's touch-proof SMISSLINE TP plug-in architecture. The breaker complies with IEC/EN 60947-2 and is designed for commercial, industrial and critical-power applications where reliable protection and reduced maintenance downtime are important.

The S401M-UCZ2 is rated for operation up to 220 V DC in a single-pole configuration and provides an ultimate short-circuit breaking capacity of 20 kA at 220 V DC. Its Type Z characteristic provides rapid magnetic operation at comparatively low multiples of rated current, making it particularly suitable for sensitive electronic and control equipment.

Key Advantages

• Compact 2 A miniature circuit breaker for low-current circuits.
• Type Z tripping characteristic suited to sensitive electronic and control loads.
• Designed for DC and AC applications.
• Single-pole operation up to 220 V DC.
• 20 kA ultimate short-circuit breaking capacity at 220 V DC.
• SMISSLINE TP plug-in construction supports efficient installation, replacement and system expansion.

Key Features

• ABB S400M-UC SMISSLINE TP series.
• 2 A rated current.
• Type Z tripping characteristic.
• 1-pole configuration.
• Suitable for AC and DC circuit protection.
• 220 V DC maximum single-pole operating voltage.
• High short-circuit breaking performance.
• IP20 protection rating.
• Plug-in mounting for the ABB SMISSLINE TP system.

Sensitive Protection for Control and Electronic Circuits

Miniature circuit breakers automatically disconnect a circuit when excessive current caused by an overload or short circuit exceeds the permitted operating range. The ABB S401M-UCZ2 combines thermal and magnetic protection with a Type Z characteristic designed to react rapidly to comparatively low short-circuit current multiples.

This sensitive characteristic makes the S401M-UCZ2 particularly useful for protecting electronic equipment, control circuits and other loads where fault currents need to be interrupted quickly. Its compatibility with both AC and DC applications and the SMISSLINE TP plug-in platform provides additional flexibility for industrial and commercial distribution designs.

Typical Applications

• Industrial DC control circuits.
• Electronic equipment protection.
• PLC and automation control circuits.
• Measurement and instrumentation circuits.
• Low-current auxiliary and signalling circuits.
• ABB SMISSLINE TP plug-in distribution assemblies.