Its C-curve tripping characteristic means it handles moderate inrush currents — typical for motor starters, contactor coils, and small transformers — without nuisance trips, while still clearing overloads and short circuits within the standard thermal-magnetic response band. For DC circuits it carries 15 kA at up to 72 V. Under UL 1077 it is rated 5 kA — relevant for North American supplementary protection applications where the breaker is not the sole branch-circuit overcurrent device. Frequency is 50/60 Hz. The part carries approvals to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077, covering the three major installation frameworks — residential, industrial, and North American supplementary protection.
The 5SY7350-7 occupies 3 modular width units on a DIN rail, with a width of 54 mm, depth of 76 mm, and height of 90 mm. Installation depth is 70 mm. Degree of pollution 3 and overvoltage category III confirm suitability for fixed industrial installations where conductive pollution or transient overvoltages are expected. The breaker is sealable — a lead seal can be applied through the housing to prevent unauthorized reset after a trip, common in safety-critical or metered circuits.