That is the standard residential and light-commercial interrupting rating in most European and Asian markets; if your panel's prospective short-circuit current exceeds 6 kA, step up to the 10 kA variant in the same family.
Fit and footprint
Single modular width (18 mm) on a standard DIN rail. Mount in any position, which helps when the enclosure layout is tight.
C-curve and load type
If your circuit is purely resistive (heaters, incandescent) a B-curve would give tighter protection; if it is a heavy motor or transformer with high inrush, a D-curve avoids nuisance trips. For the 32 A rating, expect about 3.1 W power loss per pole in hot operating state — negligible for a single breaker, but worth summing if you are packing a dozen into a sealed enclosure.
Sealable (can be locked in the OFF position for lockout/tagout).