Siemens SENTRON 5SY7303-8CC miniature circuit breaker, 3-pole, 3 A rated, D tripping characteristic, 30 kA breaking capacity per IEC 60947-2, 5 kA per UL 1077/CSA C22.2 No.235.
| Parameter | Value |
|---|---|
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
It interrupts fault currents up to 30 kA per IEC 60947-2 and 5 kA per UL 1077 and CSA C22.2 No.235 — so it clears high-energy faults without cascading upstream in a panel that sees stiff utility or transformer-fed short circuits.
At 35 °C ambient the breaker holds its full 3 A rating; at 40 °C it derates to 2.84 A, at 45 °C to 2.75 A, at 50 °C to 2.66 A, and at 55 °C to 2.56 A.
Mountable in any position.
30 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235.
Both are 3-pole SENTRON MCBs on the same DIN-rail footprint, but the 5SY7210-7CC is a 10 A B-curve device — the 5SY7303-8CC is a 3 A D-curve. The physical mounting and terminal positions are identical; the swap depends on whether the load's inrush and continuous current match the 3 A D-curve rating.
Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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