Siemens Plc42q4200atsn 200A Circuit Breaker Fuse Box

The Siemens Plc42q4200atsn is a 200‑amp, 4‑pole circuit breaker fuse box designed for industrial power distribution and protection applications. This enclosed unit houses a main circuit breaker or fused disconnect switch, providing overcurrent protection and a safe means of isolating electrical circuits. The 4‑pole configuration (3 phases + neutral) is suitable for three‑phase systems up to 240 V AC. The industrial‑grade enclosure protects internal components from dust, moisture, and accidental contact. This unit is commonly used as a main disconnect or feeder protection in control panels, machine tools, and industrial machinery. It features high interrupting capacity and meets international safety standards.

Technical Specifications

Rated current: 200 A. Number of poles: 4 (3 phase + neutral). Voltage rating: 240 V AC (maximum). Interrupting capacity: depends on circuit breaker model; typically 10 kA to 35 kA. Enclosure type: industrial metal enclosure, NEMA 1 or IP20 (indoor use). Dimensions: approximately 400 mm (H) × 300 mm (W) × 200 mm (D). Weight: 12 kg. Includes main breaker mechanism and bus bars for incoming and outgoing connections. The unit may also incorporate a shunt trip or auxiliary contact option. Operating temperature: -20°C to 50°C. Certifications: CE, UL (pending model verification).

Key Features

• 200 A continuous current rating for heavy‑duty industrial loads

• 4‑pole design for 3‑phase + neutral applications

• Enclosed construction for safety and protection

• High short‑circuit interrupting capacity

• Integrated circuit breaker or fused disconnect (model dependent)

• Suitable as main disconnect for control panels

• Bus bars for easy wiring of multiple outgoing circuits

Applications

This fuse box is used as a main disconnect or branch feeder protection in industrial control panels, motor control centers, distribution boards, machine tools, and HVAC equipment. The 200 A rating makes it suitable for moderate‑sized industrial machinery and facility power distribution.

Installation

Mount the enclosure on a flat, vertical surface using appropriate hardware. Connect incoming power cables to the line side terminals of the main breaker. Connect outgoing load cables to the load side terminals. Ensure proper torque of all connections. The enclosure should be properly grounded. Use appropriate wire sizes for 200 A (e.g., 3/0 AWG copper). The unit may be surface‑mounted or flush‑mounted.

Maintenance

Periodically inspect the enclosure for damage. Test the circuit breaker operation using the manual handle. Keep the interior clean and free from dust. The breaker has no field‑serviceable parts; replace if faulty.

Conclusion

The Siemens Plc42q4200atsn circuit breaker fuse box provides reliable overcurrent protection and safe isolation for industrial power systems. Its 200 A, 4‑pole configuration is suitable for three‑phase applications requiring a robust, enclosed disconnect solution.