The TMA trip unit's thermal dial adjusts the overload pickup (Ir) between 0.4× and 1× of the rated frame current; the magnetic short-circuit pickup (Im) adjusts between 5× and 10× Ir. Wire the line and load side per the nameplate torque values; the FF UL variant carries UL 489 listing for branch circuit protection in North American panels. Spring-cage or screw terminals accept copper conductors sized for the 400 A continuous rating — verify lug ampacity and temperature rise for the specific cable size.
ABB XT5SU330ABFN000XXX XT5S 400A MCCB, TMA 300-3000A 3P
MPNXT5SU330ABFN000XXX
ABB XT5S series, XT5S 400 frame molded case circuit breaker, TMA 300-3000 A thermal-magnetic adjustable trip unit, 3-pole, FF UL version, order code XT5SU330ABFN000XXX.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Product details
Frequently asked questions
What does the description XT5S 400 TMA 300-3000 3P FF UL mean?
It means a 3-pole XT5S 400 frame MCCB with a TMA 300-3000 A adjustable thermal-magnetic trip unit, FF UL designation for the UL 489 listed version. The 400 frame supports continuous currents up to 400 A; the trip unit adjusts overload and short-circuit protection across the 300-3000 A range.
Where can I buy the XT5SU330ABFN000XXX and how is it quoted?
This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
MPN
XT5SU330ABFN000XXX