ABB XT5 300A 3P Molded Case Circuit Breaker – XT5 Series – Thermal Magnetic LI – 50kA @ 480V

The ABB XT5 300A MCCB is designed to deliver dependable overcurrent protection for commercial and industrial power distribution systems. As part of the SACE Tmax XT5 series, this 3-pole breaker features a thermal-magnetic trip unit with adjustable long-time and instantaneous (LI) protection for enhanced system flexibility.

Built for unit-mount applications, it integrates seamlessly into ReliaGear neXT panelboards, SB switchboards, and SACE Tmax XT enclosures. This model serves as a direct upgrade for legacy Tmax T5S series breakers, ensuring continuity in modernized electrical systems. With high interrupting capacity and support for both AC and DC applications, it is well-suited for diverse operating environments.

Voltage and Rating

• Current Rating: 300 A
• Amperage Range: 210–300 A
• Voltage Rating: 600 VAC / 600 VDC
• AIC Rating:
  • 100kA @ 240VAC
  • 50kA @ 480VAC
  • 25kA @ 600VAC
  • 50kA @ 250VDC
  • 35kA @ 500VDC
  • 25kA @ 600VDC

Key Specifications

• Device Type: Molded Case Circuit Breaker (MCCB)
• Series: XT5 (SACE Tmax XT5)
• Number of Poles: 3-Pole
• Phase: 3 Phase
• Trip Technology: Thermal Magnetic
• Trip Function Code: LI
• Trip Functions: Long-Time, Instantaneous
• Trip Adjustability: Adjustable Thermal, Adjustable Magnetic
• Mounting Style: Unit Mount
• Terminal Type: Lugs

Technical Specifications

• Wire Gauge: (2) 2/0 AWG – 500 kcmil (Cu/Al)
• Max Wire Size: 500 kcmil
• Min Wire Size: 2/0 AWG
• Temperature Rating: -25°C to 70°C

Features

• Adjustable Thermal-Magnetic Trip Unit (LI)
• High Interrupting Capacity for AC and DC Systems
• HACR Rated for HVAC Applications
• Reverse Feed Capable
• Flexible Integration with ABB Power Distribution Systems
• Upgrade Solution for Legacy Tmax T5S Breakers

Returns are easy

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

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