2CCG000520R0001 ABB S403P-B16 MCB 40 kA 3P Type B 16 A

Why Choose the ABB S403P-B16 Miniature Circuit Breaker?

The ABB S403P-B16 is a high-performance 3-pole miniature circuit breaker (MCB) designed for reliable overload and short-circuit protection in low-voltage electrical distribution systems. As part of the ABB S400P range for the SMISSLINE TP plug-in system, it combines dependable current-limiting circuit protection with a flexible plug-in architecture for commercial and industrial installations.

This MCB features a Type B tripping characteristic and a rated current of 16 A. The Type B characteristic is suited to circuits with relatively low starting currents, while thermal and electromagnetic tripping mechanisms provide protection against sustained overloads and short-circuit faults.

With an ultimate short-circuit breaking capacity of 40 kA and a 3-pole configuration, the S403P-B16 provides high fault-current performance for three-pole circuits. Its SMISSLINE TP plug-in connection supports efficient installation, servicing and future modifications within compatible electrical distribution assemblies.

Key Advantages

• High-performance miniature circuit breaker for the SMISSLINE TP plug-in system.
• 16 A rated current for low-voltage circuit protection.
• Type B tripping characteristic suitable for circuits with relatively low starting currents.
• 40 kA ultimate short-circuit breaking capacity at 230 V and 400 V.
• 3-pole configuration with all three poles protected.
• Terminal connection supports conductor cross-sections up to 35 mm².
• Plug-in architecture supports efficient installation, maintenance and system expansion.

Key Features

• ABB S400P miniature circuit breaker range.
• SMISSLINE TP plug-in system compatibility.
• 16 A rated current.
• Type B characteristic.
• 3-pole configuration with three protected poles.
• 40 kA Icu at 230 V and 400 V.
• 240 V rated operational voltage according to IEC/EN 60898-1.
• Terminal capacity up to 35 mm².
• IP20 terminal protection.
• Compact three-module device format.
• Designed in accordance with IEC/EN 60898-1 and IEC/EN 60947-2.

Reliable Circuit Protection for SMISSLINE TP Systems

Miniature circuit breakers such as the ABB S403P-B16 protect electrical cables and circuits against overload and short-circuit currents. A delayed thermal tripping mechanism responds to sustained overload conditions, while an electromagnetic tripping mechanism provides rapid disconnection during short-circuit faults.

The ABB SMISSLINE TP system uses a plug-in distribution architecture that allows compatible protective devices to connect directly to the socket system. This approach supports flexible electrical distribution designs while helping simplify installation, servicing and future modifications within control panels and distribution assemblies.

Typical Applications

• Low-voltage electrical distribution systems.
• Commercial and industrial distribution boards.
• Three-pole branch and distribution circuits.
• Circuits with relatively low starting currents.
• Control panels and electrical switchboards.
• Machinery and industrial automation systems.
• ABB SMISSLINE TP plug-in distribution assemblies.