It protects branch circuits against overload and short-circuit in 400 V AC systems, with a breaking capacity of 4.5 kA per EN 60898 and 6 kA per IEC 60947-2. Mounting is quick-assembly onto DIN rail; the 36 mm width (2 width units) fits standard distribution boards.
The 5SY3232-6 carries dual breaking-capacity ratings: 4.5 kA under EN 60898 (the standard for household and similar installations) and 6 kA under IEC 60947-2 (the industrial standard for low-voltage switchgear). For DC circuits, it can interrupt 15 kA at up to 72 V DC per IEC 60947-2. UL 1077 and CSA C22.2 No. 235 recognition at 5 kA means it is accepted in North American supplementary-protection applications — useful for a panel that ships globally. Energy limiting class 3 means it restricts let-through energy enough to protect downstream equipment under short-circuit conditions. Overvoltage category III confirms it is rated for fixed-installation use, not just socket outlets.
Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% RH at 70 °C, 35% RH at 75 °C).