ABB 1SDA050953R1 Molded/Molded Case Circuit Breaker

1. Product Overview

The ABB 1SDA050953R1 Molded Case Circuit Breaker (MCCB) is a high-performance low-voltage protection device widely used in industrial and commercial power systems. It protects circuits and equipment from overload, short-circuit, and undervoltage conditions, and can also be manually operated as a switch. The 1SDA050953R1 MCCB features compact design, easy installation, high reliability, and long-term durability, making it suitable for power distribution panels, motor protection, and industrial control systems.

2. Technical Specifications

• Model: 1SDA050953R1

• Type: Molded Case Circuit Breaker (MCCB)

• Rated Operational Voltage: AC 690 V / DC 250 V

• Rated Current: 63 A

• Poles: 3P (three-pole)

• Short-circuit Breaking Capacity: 10 kA (AC)

• Trip Type: Thermal-magnetic (adjustable overload protection)

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: ≥ 4,000 operations

• Operating Temperature: -25°C to +70°C

• Mounting: Panel or DIN rail

• Protection Rating: IP20

• Dimensions (W×H×D): ~45 × 140 × 80 mm

• Weight: ~0.5 kg

3. Advantages and Features

• High-performance protection: Protects circuits and equipment from overload, short-circuit, and undervoltage damage.

• Thermal-magnetic trip design: Provides dual protection against overload and short-circuit for enhanced safety.

• Compact and reliable: Small footprint suitable for distribution panels, easy to operate.

• Long life and high reliability: Mechanical life ≥10,000 operations, electrical life ≥4,000 operations.

• Wide applicability: Suitable for motor protection, industrial distribution systems, commercial buildings, and control circuits.

4. Typical Applications

• Industrial low-voltage distribution systems

• Motor protection and control systems

• Commercial and office building power distribution

• Factory automation and control panels

• Machinery protection and electrical isolation

5. Installation & Usage Notes

• Ensure the supply voltage and rated current match before installation.

• Connect wiring according to specifications and ensure firm connections.

• Install in a dry, ventilated environment, avoiding moisture and dust ingress.

• Do not exceed the rated short-circuit breaking capacity.

• Regularly check the breaker condition and operation to ensure normal performance.

The structure and details of the product： ​

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