Delivering fixed thermal and magnetic protection, this 225A molded case circuit breaker from the ABB SACE Tmax XT4 family handles heavy-duty industrial loads. It features a robust 65kAIC rating at 480VAC for reliable fault clearing. Designed for unit mounting, this MCCB integrates seamlessly into ReliaGear neXT panelboards, switchboards, and Tmax XT enclosures. It also functions as an exact replacement for legacy T4H225 breakers. The current-limiting design includes a standard HACR rating.
ReliaGear neXT Panelboards, Switchboards, SACE Tmax XT Panelboards
Wire Gauge
4 AWG - 300 kcmil
Max Wire
300 kcmil
Min Wire
4 AWG
Protection and operation
Trip Technology
Thermal Magnetic
Trip Function Code
LI
Trip Function
Long-Time, Instantaneous
Trip Adjustability
Fixed Thermal, Fixed Magnetic
Standards and features
Available Options
Shunt Trip, Auxiliary Switch, Undervoltage Release, Motor Operator, Rotary Handle
Accessories
Lugs
Standards
CSA C22.2 No. 5, IEC 60947-2, UL 489
Approval
CCC, CE, CSA, cULus, IEC, KEMA, UL
Temp Rating
-25C to 70C
Construction Features
HACR Rated, Current Limiting, Reverse Feed
Product FAQs
7 answers
What panelboards are compatible with the XT4HU3225AFJ000XXX?
This breaker is designed for use in ABB and GE ReliaGear neXT panelboards, standard switchboards, and SACE Tmax XT panelboards.
What does the H in the XT4H frame designation indicate?
The H denotes a High interrupting capacity tier within the SACE Tmax XT family. For this 225A breaker, it provides a 65kAIC rating at 480VAC and 150kAIC at 240VAC.
Is the trip unit on the XT4HU3225AFJ000XXX adjustable?
No, this specific model features a fixed thermal and fixed magnetic (LI) trip unit. If adjustable overload or short-circuit settings are required, an Ekip DIP or Ekip Touch electronic trip unit version of the XT4 frame must be selected instead.
Can this 3-pole breaker be used in DC applications?
Yes, this thermal-magnetic breaker is rated for DC systems. It provides an interrupting capacity of 50kA at 250VDC and 65kA at 600VDC.
What type of protection does the LI trip function provide?
The LI designation indicates Long-Time (L) and Instantaneous (I) protection. The Long-Time function protects against sustained overloads, while the Instantaneous function provides immediate tripping during short-circuit faults.
What wire sizes are accepted by the lugs on this XT4H breaker?
The factory-installed lugs accept wire gauges from 4 AWG up to 300 kcmil. Ensure proper torque specifications are followed during installation as outlined in the ABB instruction manual.
How does this breaker connect to the panelboard?
This is a unit-mount, bolt-on circuit breaker. It secures directly to the chassis or mounting plate using bolted connections rather than a plug-in or I-Line style mechanism.
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