ABB S5N300TDDAS Main Circuit Breaker

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Product Model

ABB S5N300TDDAS Main Circuit Breaker

Product Overview

The ABB S5N300TDDAS is a high-performance industrial main circuit breaker designed for low-voltage distribution systems. It provides overload, short-circuit, and undervoltage protection, quickly disconnecting fault circuits to ensure system safety. The S5N300TDDAS meets international standards and is suitable for factories, power facilities, and large building low-voltage distribution systems, offering high reliability and long service life.

Technical Specifications

• Model: S5N300TDDAS

• Type: Main Circuit Breaker

• Rated Current: 300 A

• Rated Voltage: 690 V AC

• Rated Short-Circuit Breaking Capacity: 35 kA

• Poles: 3P / 4P optional

• Operating Frequency: 50 / 60 Hz

• Trip Characteristics: Thermal-magnetic protection (overload and short-circuit)

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: ≥ 4,000 operations

• Auxiliary Contacts: Optional NO/NC contacts

• Protection Class: IP20

• Mounting: Rail or bolt-mounted

• Certifications: IEC 60947-2, UL 489, CE

Advantages & Key Features

1. Reliable protection: Overload, short-circuit, and undervoltage protection ensure system safety.

2. Fast disconnection: Rapid short-circuit response prevents equipment damage.

3. Modular design: Supports multiple accessories and auxiliary contacts for flexible configuration.

4. Industrial-grade durability: Mechanical life ≥ 10,000 operations, electrical life ≥ 4,000 operations.

5. Safe operation: Manual handle enables reliable manual switching on/off.

6. International standard compliance: IEC and UL certified for global use.

Application Areas

• Industrial low-voltage distribution systems

• Factory main power supply protection

• Commercial and large building distribution systems

• Renewable energy connection and distribution

• Data centers and critical equipment power protection

• Electrical control cabinets

Precautions

1. Verify system rated current, voltage, and breaker specifications before installation.

2. Follow ABB manuals and electrical codes strictly for wiring.

3. Ensure installation area is ventilated, avoiding high temperature and humidity.

4. Regularly check breaker status and mechanical handle operation for normal function.

5. Avoid overloading to extend the circuit breaker’s service life.

6. Ensure short-circuit protection settings are correctly configured to guarantee safety.

The structure and details of the product：

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