Siemens 5SY4408-7CV, 4-pole miniature circuit breaker, C8 characteristic, 15 kA interrupting capacity at 400 V AC.
The 4-pole configuration (all phases plus neutral switched) makes it the right fit for three-phase plus neutral distribution in IEC panels, common in European and Middle East installs.
The 4-pole width occupies 72 mm (4 x 18 mm modules) of rail space — factor that into your enclosure fill calculations.
The 5SY4408-7CV has a 15 kA interrupting capacity (Icu) at 400 V AC, which is the maximum fault current it can safely interrupt under standard test conditions.
This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.
C8 means a C-trip curve with an 8 A rated current. The C curve trips at 5 to 10 times rated current, designed for moderate inrush loads like small motors and lighting circuits.
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