ABB 1SDA051018R1 Molded Case Circuit Breaker

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1. Product Description

The ABB 1SDA051018R1 Molded Case Circuit Breaker (MCCB) is an industrial-grade low-voltage protection device providing overload, short-circuit, and undervoltage protection. It features compact design, easy operation, and is widely used in industrial control panels, distribution systems, and motor protection, ensuring safe operation of electrical systems and equipment.

2. Technical Specifications

• Model: 1SDA051018R1

• Type: Molded Case Circuit Breaker (MCCB)

• Rated Operational Voltage (Ue): AC 690 V

• Rated Insulation Voltage (Ui): 800 V

• Rated Current (In): 18 A

• Poles: 3

• Short-Circuit Breaking Capacity (Icu): 10 kA (AC 400 V)

• Adjustment Range: Thermal overload 0.8–1.0 × In

• Operation: Manual lever operation

• Auxiliary Contacts: Optional NO/NC for signaling

• Mechanical Life: ≥ 10,000 operations

• Mounting: DIN rail or panel mounting

• Protection Class: IP20

• Operating Temperature: -25 ℃ to +60 ℃

• Standards Compliance: IEC/EN 60947-2

3. Advantages and Key Features

• High reliability for long-term stable industrial operation.

• Multiple protection functions including overload, short-circuit, and undervoltage protection.

• Compact design saves control cabinet space and allows modular installation.

• Easy operation with manual lever and clear ON/OFF status.

• Auxiliary contacts for remote monitoring or interlocking.

• International standard compliance with IEC/EN 60947-2.

4. Typical Applications

• Industrial low-voltage distribution systems

• Motor protection and control systems

• Automated production lines and control cabinets

• Building distribution and facility protection

• Factory and industrial automation power protection

5. Precautions

• Disconnect power before installation or maintenance to ensure safety.

• Confirm rated current matches the load to avoid overload or damage.

• Regularly check terminal connections and lever operation.

• Avoid exposure to high humidity, corrosive, or dusty environments.

• Ensure secure installation to prevent accidental loosening.

The structure and details of the product：

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