Siemens 5SY6203-7CC — SENTRON 2-Pole C-Curve MCB
Breaking Capacity and Voltage Ratings
For North American panels it carries a 5 kA rating at 440 VAC per UL 1077 and CSA C22.2 No.235, so it qualifies as a supplementary protector in UL 508A industrial control panels. Maximum operating voltage is 440 VAC in single- or multi-phase operation, with a DC rating of 72 V — useful for control circuit isolation in 48 VDC or 60 VDC bus architectures.
Combined terminals on both top and bottom accept incoming and outgoing conductors without needing separate busbar connectors for daisy-chaining. Sealed and halogen-free construction suits environments where outgassing or silicone contamination is a concern, like clean rooms or coating lines.
Environmental and Service Life
Mechanical service life 10,000 operating cycles.
The 5SY6203-7CC carries IEC 60898 and UL 1077 / CSA C22.2 No.235 certifications, covering European and North American installations. IP20 protection (with connected conductors) means it's touch-safe only when wired into an enclosure — not for wet or washdown zones. The energy limitation class of 3 indicates it limits let-through energy under fault conditions, which aids downstream device coordination.