The ABB 3BBR0000100851 is the order-code variant of the ACS880-01-025A-3 drive, built into Frame Size R2. This frame size governs the physical footprint and the heat sink capacity — R2 tells the panel builder which gland plate cutout and DIN-rail spacing to expect before the drive arrives on site.
What the frame size tells the installer
Frame Size R2 on an ACS880-01 means the drive is in the smaller end of the modular family — typically suited for motor currents up to the 25 A range on 400 V three-phase. The R2 enclosure keeps the panel fill factor manageable: it fits on a standard backplate without needing the oversized gland plate of R3 or R4. If you're retrofitting an older drive, measure the existing mounting hole pattern; R2 matches the common 200 mm × 300 mm footprint of many mid-range VFDs.
Sourcing reality for this code
The buyer can specify it into a multi-year project without planning a second-source gate today. The ACS880 series is widely supported, so compliance documentation (CE, UL, RoHS) is available through the standard ABB document portal — no special request needed for the R2 variant.