ABB XT1SU3125AFD000XXX 125A 3P Molded Case Circuit Breaker – XT1 Series – Thermal Magnetic – 35kA @ 480V

The ABB XT1SU3125AFD000XXX is a 125A, 3-pole molded case circuit breaker from the SACE Tmax XT1 series, designed for commercial and industrial power distribution systems. It provides reliable overcurrent protection through a fixed thermal-magnetic trip unit, delivering both long-time and instantaneous (LI) protection.

This unit-mount breaker is engineered for installation in ABB ReliaGear neXT panelboards and ReliaGear SB switchboards, as well as SACE Tmax XT panelboard systems. It also serves as a direct replacement for the discontinued T1N125TL, ensuring compatibility in upgraded electrical installations.

With a 35kA interrupting rating at 480VAC, this MCCB provides strong fault-clearing performance while maintaining a compact XT1 frame design.

Voltage and Rating

• Current Rating: 125 A
• Voltage Rating: 240VAC, 480VAC, 600Y/347VAC, 250VDC
• AIC Rating:
  • 65kA @ 240VAC
  • 35kA @ 480VAC
  • 22kA @ 600Y/347VAC
  • 42kA @ 250VDC

Key Specifications

• Device Type: Molded Case Circuit Breaker
• Series: XT1 (SACE Tmax XT1)
• Number of Poles: 3-Pole
• Phase: 3 Phase
• Trip Technology: Thermal Magnetic
• Trip Function Code: LI
• Trip Function: Long-Time, Instantaneous
• Trip Adjustability: Fixed Thermal, Fixed Magnetic
• Mounting Style: Unit Mount
• Terminal Type: Lugs
• Application: Industrial and commercial distribution systems

Technical Specifications

• Wire Range: 10 AWG – 2/0 AWG (Cu/Al)
• Max Wire: 2/0 AWG
• Min Wire: 10 AWG
• Temperature Rating: -25°C to 70°C
• Construction Features: HACR Rated, Current Limiting, Reverse Feed, Double Insulated
• Standards: CSA C22.2 No. 5, IEC 60947-2, UL 489
• Approvals: CE, CSA, cULus, IEC, UL

Product Data

• Manufacturer: ABB
• Model Number: XT1SU3125AFD000XXX
• Product Series: XT1 (SACE Tmax XT1)
• Installation Type: Unit Mount

Returns are easy

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

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