ABB / GE TEY350ST12 50 Amp 3 Pole Thermal Magnetic Circuit Breaker – Bolt-On – 120/240/480Y/277V AC

The ABB / GE TEY350ST12 50 Amp three-pole molded case circuit breaker is designed for dependable commercial and industrial power distribution applications. Part of the GE Q-Line TEY series, it provides reliable thermal-magnetic LI (Long-Time and Instantaneous) protection to safeguard electrical systems against overloads and short-circuit faults. This unit includes a factory-installed 120–277VAC shunt trip, enabling remote tripping for improved operational control and safety. Its bolt-on design ensures secure installation in GE A-Series, AE, and AS lighting panelboards. Rated at 14kA at 480Y/277VAC, it delivers consistent performance in demanding environments.

Voltage and Rating

• Current Rating: 50 Amps
• Voltage Rating: 120VAC, 240VAC, 480Y/277VAC, 250VDC, 120/240VAC
• Frequency: 50/60 Hz
• Interrupting Capacity:
  • 65kA @ 120VAC
  • 65kA @ 240VAC
  • 14kA @ 480Y/277VAC
  • 10kA @ 250VDC
  • 65kA @ 120/240VAC
• Phase: 3 Phase

Key Specifications

• Breaker Type: Molded Case Circuit Breaker (MCCB)
• Trip Function: LI (Long-Time & Instantaneous)
• Protection Type: Thermal Magnetic
• Number of Poles: 3-Pole
• Series: GE Q-Line TEY
• Mounting Style: Bolt-On
• Application: Commercial and industrial lighting and power distribution
• Compatible Panelboards: GE A-Series, AE, and AS Lighting Panelboards
• Shunt Trip: Factory-installed 120–277VAC
• Construction Features: HACR Rated, HID Rated, Common Trip, Quick-Make/Quick-Break
• Accessories Available: Padlock Attachment, Mounting Base, Load Side Lugs Included

Technical Specifications

• Wire Size Range: 10–4 AWG (Cu/Al)
• Max Wire: 4 AWG
• Min Wire: 10 AWG
• Terminal Type: Load Side Lugs Included
• Trip Technology: Thermal Magnetic
• Trip Adjustability: Fixed
• Temperature Rating: 40°C
• Certifications/Approvals: UL 489, CSA C22.2 No. 5.1, CSA, HACR, HID, UL Listed

Product Data

• Manufacturer: ABB / General Electric
• Part Number: TEY350ST12
• Series: TEY
• Family: Q-Line

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You may return items within 30 days of delivery for a refund.

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