2CCS562001R1978 ABB S402M-UCZ1.6 DC MCB 2P Type Z 1.6 A

Why Choose the ABB S402M-UCZ1.6 DC Miniature Circuit Breaker?

The ABB S402M-UCZ1.6 is a two-pole miniature circuit breaker (MCB) designed for DC circuit protection within the ABB SMISSLINE TP plug-in distribution system. It combines overload and short-circuit protection with simultaneous two-pole switching for demanding low-current DC circuits.

As part of the ABB S400 M-UC series, the S402M-UCZ1.6 has a 1.6 A rated current and a sensitive Z tripping characteristic. The two-pole configuration is designed for applications up to 440 V DC, making it suitable for electronic, instrumentation, control and automation circuits requiring responsive overcurrent protection.

The S402M-UCZ1.6 provides a rated ultimate short-circuit breaking capacity of 50 kA for this low-current variant. It occupies two modules, weighs approximately 221 g according to current ABB catalogue data and is identified by ABB order code 2CCS562001R1978 and EAN / GTIN 7612270110278.

Key Advantages

• Purpose-designed for DC circuit protection.
• Two-pole configuration for simultaneous switching and protection.
• 1.6 A rated current for low-current DC circuits.
• Sensitive Z tripping characteristic for electronic and control applications.
• Suitable for two-pole applications up to 440 V DC.
• High 50 kA ultimate short-circuit breaking capacity for this variant.
• Compact two-module construction.
• Plug-in design supports efficient integration with the ABB SMISSLINE TP system.

Key Features

• ABB SMISSLINE TP S400 M-UC series.
• Two-pole DC miniature circuit breaker.
• 1.6 A rated current.
• Type Z tripping characteristic.
• Suitable for two-pole DC applications up to 440 V DC.
• 50 kA Icu for the 1.6 A variant.
• Designed for protection of sensitive electronic and control circuits.
• SMISSLINE plug-in mounting.
• Two-module format.
• Designed in accordance with IEC/EN 60947-2.

Sensitive Two-Pole DC Circuit Protection

Direct-current circuits require protective devices specifically designed to interrupt DC fault currents reliably. ABB's S400 M-UC range combines thermal overload protection and magnetic short-circuit protection with the SMISSLINE TP plug-in architecture, providing dedicated protection for DC distribution and control applications.

The Z characteristic provides sensitive magnetic operation at relatively low multiples of rated current, making the S402M-UCZ1.6 particularly suitable for electronic equipment, instrumentation and control circuits. Its two-pole configuration also supports DC applications up to 440 V DC when installed in accordance with ABB's specified connection arrangement.

Typical Applications

• ABB SMISSLINE TP DC distribution systems.
• Sensitive electronic circuits.
• Industrial DC control circuits.
• Instrumentation and measurement systems.
• Automation and PLC auxiliary supplies.
• DC signalling and monitoring circuits.
• Control-panel DC power distribution.
• Commercial and industrial low-voltage DC installations.