ABB XT4 250A 3P Molded Case Circuit Breaker – XT4 Series – Thermal Magnetic (TMF) – 100kA @ 480V

Built to handle substantial electrical loads, this 250A molded case circuit breaker is part of the ABB SACE Tmax XT4 family, designed for high-demand commercial and industrial power distribution systems. It serves as a modern replacement for legacy T4L250TW breakers when used with the appropriate retrofit kit, ensuring smooth system upgrades.

This unit-mount MCCB installs into ABB ReliaGear neXT panelboards and ReliaGear SB switchboards. It utilizes fixed thermal and magnetic (TMF) trip elements to provide reliable long-time and instantaneous (LI) protection against overloads and short circuits.

With an impressive interrupting capacity of up to 200kA at 240VAC and 100kA at 480VAC, this current-limiting breaker offers superior fault protection for critical infrastructure. Lugs are not included, allowing flexibility for custom wiring configurations.

Voltage and Rating

• Current Rating: 250 A
• Voltage Ratings: 240VAC, 480VAC, 600VAC, 250VDC, 600VDC
• AIC Rating:
  • 200kA @ 240VAC
  • 100kA @ 480VAC
  • 50kA @ 600VAC
  • 85kA @ 250VDC
  • 75kA @ 600VDC

Key Specifications

• Device Type: Molded Case Circuit Breaker (MCCB)
• Series: XT4 (SACE Tmax XT4)
• Number of Poles: 3-Pole
• Phase: 3 Phase
• Trip Technology: Thermal Magnetic (TMF)
• Trip Function Code: LI
• Trip Function: Long-Time, Instantaneous
• Trip Adjustability: Fixed Thermal, Fixed Magnetic
• Mounting Style: Unit Mount
• Terminal Type: Lugs (Not Included)

Technical Specifications

• Wire Range: 3/0 AWG – 350 kcmil (Cu/Al)
• Max Wire Size: 350 kcmil
• Min Wire Size: 3/0 AWG
• Standards: CSA C22.2 No. 5, IEC 60947-2, UL 489
• Approvals: CCC, CE, CSA, cULus, IEC, KEMA, UL
• Temperature Rating: -25°C to 70°C

Features

• HACR Rated
• Current Limiting Design
• Reverse Feed Capable

Returns are easy

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

FREE Shipping on orders over $149.

My Circuit Breakers offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).

Same Day Shipping

We strive to ship out your items within one business day.

In rare circumstances, My Circuit Breakers may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.

My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.