Siemens SENTRON 5SY4305-7, 3-pole miniature circuit breaker, 0.5 A rated current, C tripping characteristic, 10 kA breaking capacity per EN 60898, 35 kA per IEC 60947-2.
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | C |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Energy limitation class | 3 |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 0.5 A |
| Rated voltage (AC, multi-phase) | 440 V |
| Neutral conductor switching | No |
| 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 |
The 5SY4305-7: At 0.5 A, this is a low-current branch breaker — think control transformers, solenoid valves, or signal-conditioning supplies drawing under half an amp. The C-curve means it holds through the 8–10× inrush of a small control transformer primary without opening, then clears a hard fault fast.
Halogen-free and silicon-free construction avoids outgassing concerns near sensitive contacts or in clean-room zones.
The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL1077. These cover both residential-style miniature circuit breaker testing and industrial power circuit breaker standards, so it qualifies for panels built to either code.
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