XT3N 225 TMF — what this MCCB covers
The XT3NU3200AAA000XXX: The XT3N frame is ABB's compact, high-interrupting-capacity platform for distribution and motor-circuit protection in commercial and industrial panels.
Panel fit and coordination context
The 225 A rating positions it as a main or feeder breaker in distribution boards, typically coordinated downstream of a larger frame (XT4 or XT5) and upstream of branch MCCBs or fused switches. Because the TMF trip unit is fixed (non-interchangeable), the breaker's overload and short-circuit settings are factory-set to the 225 A continuous current rating. This suits applications where the load profile is stable and the panel design does not require field-adjustable trip curves — common in fixed-load feeders, lighting panels, and small motor control centers.