ABB B50-30-11 contactor

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Product Overview

The ABB B50-30-11 Contactor is a high-performance 3-pole AC contactor rated at 50A for AC-3 applications. It is designed for reliable control of motors, heaters, capacitors, and other loads. The unit comes with 3 main contacts and 1 normally open + 1 normally closed auxiliary contact (1NO+1NC). With a compact design and high reliability, it is widely used in industrial control and power distribution applications.

Technical Specifications

• Model: B50-30-11

• Main contacts: 3-pole

• Auxiliary contacts: 1NO + 1NC

• Rated current (AC-3): 50 A

• Rated operational voltage: 690 V AC

• Control voltage range: Available in 24V AC/DC, 110V AC, 220/230V AC, 400V AC (depending on coil version)

• Mechanical life: Approx. 10 million operations

• Electrical life: Approx. 1 million operations (under AC-3 load)

• Mounting: DIN rail or screw fixing

• Frequency: 50/60 Hz

• Standards: IEC/EN 60947-4-1

• Protection rating: IP20 (higher when installed inside an enclosure)

Features & Benefits

1. High reliability: Ensures stable and safe operation under demanding conditions.

2. Flexible auxiliary contacts: 1NO+1NC for versatile control logic.

3. Compact design: Saves space inside control cabinets.

4. Durable construction: Long mechanical and electrical lifespan.

5. Universal coil options: Multiple voltage versions for global use.

6. Compliance with standards: Meets IEC/EN requirements for industrial environments.

Application Areas

• Motor control (start, stop, reversing)

• Power distribution and load control

• Machinery and automation systems

• HVAC equipment control

• Pumps and fans

• Electric heating and lighting control

Precautions

1. Select the correct coil voltage for the supply network.

2. Ensure proper ventilation and avoid long-term overload operation.

3. Wiring and protection must comply with IEC/EN 60947-4-1 standards.

4. Use suitable overload relays or protection devices for motor protection.

5. Consider both mechanical and electrical lifetime in high-frequency switching.

6. Prevent exposure to dust, humidity, or corrosive gases by installing in a protected environment.

The structure and details of the product：

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