What the 32 A and Curve B mean on the panel
The S803S-B32 is a 3-pole miniature circuit breaker rated for 32 A continuous current with a B-trip curve, meaning it trips magnetically at 3–5 times rated current. That makes it a solid fit for resistive loads and short cable runs where inrush isn't heavy — think lighting banks, heater banks, or control transformers in a panel.
The 3-pole body takes up three module widths (roughly 54 mm) on the rail, so plan your enclosure fill accordingly. Rated operational voltage covers 400/690 V AC three-phase and 375 V DC, so it'll handle common motor branch circuits and DC bus feeds in the same panel.