ABB 1SDA051322R1 Molded Case Circuit Breaker

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Product Overview

ABB 1SDA051322R1 Molded Case Circuit Breaker (MCCB)
The ABB 1SDA051322R1 is a high-performance Molded Case Circuit Breaker (MCCB) designed for overload, short-circuit, and undervoltage protection in industrial, commercial, and residential low-voltage distribution systems. It features adjustable trip settings, modular design, and high breaking capacity, suitable for both distribution backbone protection and branch circuit protection. It can be combined with auxiliary contacts, shunt trips, alarms, and other accessories for intelligent power distribution management.

Technical Specifications

• Model: 1SDA051322R1

• Product Type: Molded Case Circuit Breaker (MCCB)

• Rated Operational Current (In): 125 A

• Rated Insulation Voltage (Ui): 800 V AC

• Rated Operational Voltage (Ue): 690 V AC

• Poles: 3P (Three-pole)

• Trip Mechanism: Thermal-magnetic (adjustable)

• Breaking Capacity (Icu): 25 kA

• Auxiliary Contacts: Optional NO/NC

• Mounting Method: Panel or DIN rail mounting

• Protection Class: IP20

• Standards: IEC 60947-2

Advantages and Features

1. Comprehensive Protection
   Provides overload, short-circuit, and undervoltage protection to enhance circuit safety.

2. Adjustable Trip Settings
   The thermal-magnetic trip can be tuned according to load characteristics for flexible application.

3. High Breaking Capacity
   With a breaking capacity of up to 25 kA, suitable for demanding industrial environments.

4. Modular Expansion
   Supports expansion with auxiliary contacts, shunt trips, and alarm contacts.

5. Compact and Easy Installation
   Standard design allows DIN rail or panel mounting for convenient field installation and maintenance.

Typical Applications

• Main and branch circuit protection in industrial power distribution

• Low-voltage distribution systems in commercial buildings

• Overcurrent protection for motors and heavy loads

• HVAC systems and building automation power protection

• Power and energy management systems

• Control panels and distribution board fault protection

Installation & Usage Notes

1. Ensure the breaker’s rated current and voltage match the system load before installation.

2. Make secure and correct wiring to avoid misconnection or loose contacts.

3. Avoid long-term use in humid, corrosive environments or high-vibration locations.

4. Regularly inspect the trip unit and accessory modules to ensure protection effectiveness.

5. Disconnect system power and clearly label before maintenance or breaker replacement.