What you're sourcing
The ABB ACS355-03E-02A4-4+J404 is a micro drive from the ACS355 family, listed under Motors & Motor Controls › Drives › Motor Drives with a nameplate weight of 2.27 kgs.
Reading the ratings that actually decide fit
At 2.27 kgs, the chassis is light enough that panel-mounting decisions are driven by DIN-rail footprint and clearance around the heatsink, not by handling. Leave the venting paths the ACS355 manual calls for — the small-frame units cook faster than the big ones when the cabinet runs warm.
Sourcing posture
The line carries ABB branding and sits in the active Motor Drives category with no obsolescence flag on record. Commit the line by quoting to order against an RFQ: the seed code, the +J404 option suffix, and the 2.27 kgs chassis spec are the three facts a buyer needs on the PO.