This is a high‑capacity low‑voltage air circuit breaker designed for electrical power distribution protection in industrial, commercial, and utility systems. It interrupts fault currents and protects circuits from overloads, short circuits, and ground faults. The E4S 40 breaker belongs to the Emax family which offers high breaking capacity and configurable protection options for system coordination and safety.

This is a shunt closing release coil used as an accessory on ABB low‑voltage power circuit breakers. When energized, it activates the internal closing mechanism of the breaker allowing the breaker to be closed electrically (remotely) via a control signal rather than manually. It is commonly used in motor control centers, switchgear panels, and automated systems where remote breaker operation is needed.

ABB YO-1SDA038291R1 is a shunt opening release (shunt trip) accessory designed for ABB low-voltage power circuit breakers.It enables remote electrical tripping of the circuit breaker when a control voltage is applied to the shunt coil. This function is typically used for emergency shutdown, safety systems, and remote control applications. When energized, the shunt release mechanically opens the circuit breaker, disconnecting the circuit.

ABB 1SDA058191R1 is an external neutral current sensor accessory for ABB low-voltage air circuit breakers in the SACE Emax series. It is designed to measure and provide a neutral current signal for breaker frames such as E1, E2, E4, etc., and is used in applications where external neutral current measurement is required for protection, monitoring, or control functions. The product works with neutral conductor sizes corresponding to 50–100% of rated range and supports neutral current measurement up to 2000 A.

The ABB 1SDA058218R1 is an external neutral current transformer sensor accessory designed for use with ABB SACE Emax low-voltage air circuit breakers. It is specifically configured for E3 and E6 frame breakers with a primary current rating up to 3200 A. This neutral sensor measures the current in the neutral conductor and provides accurate neutral current feedback for breaker protection, monitoring, and control systems. It is used where enhanced neutral current detection is required by protection relays or trip units.

The ABB SACE Emax PR121/P is a trip unit / protection release designed for use with ABB SACE Emax series low-voltage air circuit breakers. It is a microprocessor-based, self-powered electronic protection module that integrates multiple protection functions into one unit. The PR121/P monitors current and provides overload, short-circuit, instantaneous short-circuit, and optional earth-fault protection, depending on configuration. It is installed directly on Emax breakers (3-pole or 4-pole, with or without neutral) and controls the breaker’s trip mechanism to interrupt the circuit when a trip condition is detected. The unit also provides LED indicators for alarm/trip status and allows parameter setup via DIP switches or external configuration tools

The ABB 1SDA058151R1 is a fixed three-pole moulded case circuit breaker (MCCB) from the ABB Tmax T5N series, designed for industrial and commercial electrical protection. It features an electronic solid-state trip unit (PR221DS-LS/I) that provides reliable current protection for AC circuits. The breaker has front-mounted terminals for easy installation and is suitable for use in power distribution systems where UL and CSA certification is required.

The ABB YU-1SDA038312R1 is an undervoltage release (UVR) accessory for ABB low-voltage circuit breakers (such as the SACE Emax/E1–E6 series). It is designed to monitor the supply/control voltage and automatically trip (open) the circuit breaker when the supply voltage falls below a safe threshold. This protection helps prevent malfunction, damage to electrical equipment, and unsafe operating conditions in industrial, commercial, and automation systems. The device operates reliably across both 50 Hz and 60 Hz power systems and is suitable for integration in control panels and power distribution equipment.

ABB SACE PR111/P is a microprocessor-based electronic protection trip unit designed for use with ABB SACE Emax low-voltage air circuit breakers. It continuously monitors the current flowing through the circuit breaker and provides reliable overcurrent protection. When preset protection thresholds are exceeded, the PR111/P sends a trip command to the breaker mechanism, ensuring fast and safe disconnection of the circuit.

The ABB PR122/P‑LI E1/6 is a microprocessor‑based electronic protection trip unit designed for ABB SACE Emax low‑voltage air circuit breakers with frame sizes from E1 to E6. It provides advanced electronic overcurrent protection and control for power distribution applications.