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 |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Breaking capacity per IEC 60947-2 | 30 kA |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 3 A |
| Rated voltage (AC, multi-phase) | 440 V |
| Parameter | Value |
|---|---|
| Modular width units | 3 |
| Mounting position | any |
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 75 °C |
| Terminal tightening torque, min. | -40 °C |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Fastening method | Quick assembly system |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Influence of surrounding temperature | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
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.
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