General Electric | TEY3045ST12 | Circuit Breaker | 45A | 3-Pole | 480V

Meet the General Electric TEY3045ST12 circuit breaker — a purpose-built, three-pole protector engineered for demanding 3‑phase 480V installations. With a precise 45A rating, it delivers reliable overcurrent protection that keeps motors, feeders, and control circuits safeguarded in industrial environments.

Why this GE circuit breaker stands out

Designed for maintenance, retrofit, and replacement scenarios, the TEY3045ST12 is built to integrate smoothly with existing GE gear and compatible panels. The three‑pole construction ensures synchronized tripping across all phases in 480V systems, providing balanced protection and reducing the risk of partial phase faults. The part number TEY3045ST12 serves as the most reliable reference when verifying fit and ratings, helping you avoid compatibility mismatches during replacements or upgrades.

Key specifications at a glance

• Amperage: 45A
• Poles: 3-Pole
• Voltage rating: 480V
• Part number: TEY3045ST12
• Best reference for compatibility: Yes — confirm fit and ratings before ordering

Ideal use cases

This breaker is well-suited for industrial environments where 3‑phase 480V power is distributed to motors, pumps, conveyors, and heavy equipment. It’s a dependable choice for:

• New installations in multi‑panel electrical rooms requiring robust 3‑phase protection
• Retrofits where exact GE part numbers are needed to maintain panel coordination
• Repairs or spare parts programs for equipment fleets that operate at 480V and rely on precise 45A protection

Practical considerations and tips

Before ordering, always verify that the TEY3045ST12 matches your panel’s spec sheet and termination requirements. Keeping a spare TEY3045ST12 on hand can streamline maintenance cycles and minimize downtime during planned replacements. In systems where consistent phase protection is critical, this 3‑pole design helps maintain safe, reliable operation across the entire 480V distribution network.

If you’re upgrading or replacing existing protection, the TEY3045ST12’s explicit 45A, 3‑pole, 480V profile provides a clear, unambiguous fit for compatible GE equipment, reducing the guesswork and ensuring proper performance in mission‑critical applications.