Product Introduction
The 250 A frame is the mechanical backbone — it determines the bus bar spacing, lug size, and mounting footprint. The TMF 35-400 trip unit is the adjustable thermal-magnetic element; the 35-400 range covers the continuous current rating from 35 A up to 400 A, so one breaker frame covers a wide spread of feeder or branch sizes.
UL and CSA marks are listed on the nameplate, which satisfies the typical North American panel shop requirement. RoHS and REACH declarations are standard with ABB's XT4N series documentation package; request those at quote time if your compliance audit needs them on file.