General Electric | TJK436300LL | Circuit Breaker | 300A | 3-Pole | 600V

General Electric’s TJK436300LL is a purpose-built circuit breaker engineered for demanding electrical installations. This 300A, 3-pole unit is rated for 600V, making it a robust choice for high-current feeders in commercial and industrial panels. Designed for maintenance, retrofit, and replacement projects, it helps you restore reliable protection with exact-spec compatibility.

Key specifications

• Amperage: 300A
• Poles: 3-Pole
• Voltage rating: 600V
• Part reference: TJK436300LL
• Important note: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.

Why this GE circuit breaker stands out

Choosing the exact GE part number TJK436300LL delivers a precise match to your existing panel geometry, mounting footprint, and interruption characteristics. This means fewer retrofit surprises and quicker, more dependable protection for high-current circuits. With a three-pole configuration, it provides clean, balanced protection across all phases, helping to safeguard motors, feeders, and distribution networks from overloads and faults.

Ideal applications and use cases

• Replacing a worn or outdated GE breaker in panels that specify a 300A, 3-pole 600V unit.
• Retrofit projects where existing equipment requires an exact-spec part to maintain electrical code compliance and system performance.
• High-current feeders for commercial equipment, industrial machinery, and three-phase distribution networks.
• Spare parts planning for maintenance programs in facilities with GE electrical infrastructure.

Fitment, verification, and installation tips

To ensure seamless compatibility, verify that your panel accepts a 3-pole, 600V unit with the same amperage. The best reference for compatibility is the exact part number—TJK436300LL—paired with your panel’s model and series. Before installation, disconnect power, follow local electrical codes, and use proper PPE. If you’re uncertain about fitment, consult your panel’s documentation or a licensed electrician to confirm the match.

Practical guidance for maintenance and longevity

• Store replacement breakers in their original packaging until installation to prevent corrosion or damage.
• Inspect for visible wear or damage before swapping in a new unit; do not reuse a compromised breaker.
• Integrate with routine panel inspections to catch mounting or alignment issues early, maintaining reliable trip performance.