Description

Product Overview
The ABB SJ204T-C40 (2TAZ144400R0404) is a premium 4-pole miniature circuit breaker (MCB) from ABB’s SJ200T series, designed to provide reliable overcurrent protection in three-phase systems. With a rated current of 40 A and a Type C thermal-magnetic trip curve, it is ideal for typical industrial and commercial circuits that may experience moderate inrush currents (such as small motors or inductive loads).

Key Features

• Part Number: 2TAZ144400R0404 

• Model / Series: SJ204T-C40, part of ABB’s SJ200T line. 

• Current Rating: 40 A 

• Number of Poles: 4P (three phases + neutral) 

• Tripping Curve: Type C (thermal-magnetic) – suitable for moderate surge / inrush. 

• Breaking Capacity: Up to 3 kA (per SJ200T datasheet) 

• Rated Voltage: 230 / 400 V AC (standard rating for SJ200 series) 

• Standards Compliance: IEC / EN 60898-1 

• Mechanical & Electrical Endurance: High cycle life (standard for SJ series) 

• Mounting: DIN-rail compatible (modular design) 

• Protection / Safety: IP20 rated enclosure (standard for MCBs) 

• Operating Temperatures: -25 °C to +55 °C typical for SJ200 series 

Applications

• Three-phase power distribution boards

• Protection of lighting circuits, small motors, and control circuits

• Commercial / industrial electrical panels with neutral requirement

• Sub-distribution boards in factories or commercial buildings

• Backup or secondary protection for branch circuits

Benefits

• Reliable Overcurrent Protection: Automatic disconnection of faulty circuits to prevent damage.

• Neutral Disconnection: 4-pole design ensures neutral is also isolated when tripped.

• Compact & Modular: Fits standard DIN-rail panels; space-efficient installation.

• Safe & Certified: Meets international IEC standards; manufactured by ABB for quality assurance.

• Long-Life Design: Designed for many electrical cycles, contributing to reliability over time.

Installation & Handling

• Mount on a standard 35 mm DIN rail.

• Use correct tightening torque for terminals as per ABB specifications (refer to ABB datasheet).

• Store / handle in dry environments; avoid exposure to dust or corrosive atmospheres.

Ordering / Part Info
When ordering, specify Part No: 2TAZ144400R0404 to ensure you get the exact 4-pole, 40 A, Type C version. For project planning, consult ABB’s SJ200 series datasheet for current–time curves and coordination data.