Integrator's spec recap — 5SY7308-8CC
Breaking capacity is 25 kA per IEC 60947-2, which gives solid selectivity headroom downstream of a 25 kA-rated main breaker; under UL 1077 / CSA C22.2 No. 235 it's listed at 5 kA — enough for most North American panelboards where the utility transformer limits fault current. Terminals accept 0.75 to 35 mm² solid or stranded copper — covers everything from control-circuit tails to feeder-sized conductors — and the screw terminals torque to 2.5–3.5 N·m, typical for this class.
Width is 54 mm (3 width units on a DIN rail), depth 76 mm, installation depth 70 mm — drops into any standard 35 mm DIN-rail enclosure with room for gland plates and wiring ducts. Mounting position is any; ambient range -25 to +55 °C, storage -40 to +75 °C. Sealable terminals and touch protection are built in — useful for installations that require lockout/tagout or anti-tamper provisions.
Halogen-free and silicon-free construction, overvoltage category III, suitable for mechanical engineering and industrial environments per the manufacturer's designation. Rated frequency 50/60 Hz, DC maximum rated voltage 72 V — covers both AC and some DC control circuits, though the D-curve is optimized for AC inductive loads.