GE TB43300AF14 Tri‑Break Molded Case Circuit Breaker

Description

Technical Specifications

Electrical Specifications

• Product Type: 3‑Pole Molded‑Case Circuit Breaker (MCCB)
• Series: TB43 Tri‑Break
• Rated Current (In): 300 Amperes
• Frame Size: 400A frame (TB4)
• Rated Voltage: 600 VAC (3‑phase)
• Interrupt Rating (AIC): 200,000 A symmetrical @ 480 VAC
• Trip Unit Type: Interchangeable Thermal‑Magnetic (LI: Long‑Time + Instantaneous)
• Trip Functions: Long‑time inverse‑time overload protection; instantaneous short‑circuit protection
• Current Limiting: Integrated Tri‑Break current‑limiting design with internal fuses
• Connection Type: Bolt‑On mounting
• Phase Configuration: 3‑Phase, 3‑Wire
• Operating Frequency: 50/60 Hz (auto‑compatible)
• Dielectric Strength: Complies with IEEE/ANSI industrial standards

Physical & Environmental Specifications

• Mounting: Panel‑mount, bolt‑on connection (load lugs sold separately)
• Operating Temperature: -25°C to +70°C (-13°F to +158°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: Up to 90% (non‑condensing)
• Pollution Degree: 2 (industrial environment)
• Ingress Protection: IP20 (enclosed construction)
• Weight: Approximately 43 lbs (19.5 kg)
• Certifications: UL Listed, cUL Certified, ANSI/IEEE compliant, CE marked

Key Features

• Tri‑Break Current‑Limiting Technology: Delivers ultra‑fast fault interruption, minimizing arc energy and equipment damage during short‑circuit events.
• High Interrupt Capacity: 200kA AIC @ 480V provides robust protection for high‑fault‑current distribution systems.
• Interchangeable Trip Units: Supports field‑replaceable thermal‑magnetic LI trip units for flexible protection customization.
• Thermal‑Magnetic Protection: Long‑time inverse‑time overload protection and instantaneous short‑circuit trip for comprehensive circuit safeguarding.
• Compact TB4 Frame Design: Optimizes panel space utilization in tight distribution enclosures.
• Bolt‑On Installation: Secure, permanent connection for high‑vibration industrial environments.
• Internally Fused: Integral current limiters enhance fault‑clearing performance and system safety.
• Visual Trip Indication: Integrated trip flag for quick identification of fault conditions.
• Wide Temperature Operation: Performs reliably in extreme industrial and commercial environments.
• Maintenance‑Free: No periodic calibration required for thermal‑magnetic trip elements.
• Durable Construction: High‑temperature, corrosion‑resistant internal components ensure long‑term reliability.

Application Scenarios

• Industrial Power Distribution: Primary circuit protection for motor control centers (MCCs), industrial control panels, and heavy machinery circuits.
• Commercial Buildings: Feeder protection for main distribution boards, lighting panels, and HVAC systems in offices, retail spaces, and high‑rises.
• Manufacturing Facilities: Protection for production lines, conveyor systems, and heavy industrial equipment in automotive, metalworking, and electronics plants.
• Utility Substations: Distribution feeder protection in medium‑voltage utility substations and power distribution networks.
• Data Centers: Critical circuit protection for server racks, UPS systems, and power distribution units (PDUs).
• Oil & Gas Industry: Power circuit protection for onshore/offshore drilling rigs, pumping stations, and processing facilities.
• Mining Operations: Protection for underground and surface mining equipment, conveyor systems, and ventilation circuits.
• Water & Wastewater: Feeder protection for pump stations, treatment plants, and desalination facilities.
• Marine & Offshore: Power circuit protection for marine vessels, offshore platforms, and floating production systems.
• Renewable Energy: Integration with solar inverter systems and wind turbine power distribution circuits.