Siemens SENTRON 5SY8508-8 miniature circuit breaker, D-tripping characteristic, 8 A rated, 2-pole (1P+N), 40 kA at 230 V AC, 2 MW, IP20.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 2 |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Fastening method | Quick assembly system |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Width | 36 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Modular width units | 2 |
| Torque, min. | -40 °C |
| Torque, max. | 75 °C |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| IP protection class | IP20, with connected conductors |
| Pollution degree | 3 |
| Halogen-free | Yes |
| Silicone-free | Yes |
IP20 with connected conductors — fine inside a closed cabinet, not for washdown. Ambient range -40 to 75 °C, but derate above 55 °C per the humidity curve (95% RH at 55 °C, 55% at 70 °C, 35% at 75 °C). Vibration tested to IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz — survives typical machine-mount vibration.
This is a current-production part (lifecycle stage: current). No successor or phase-out notice.
Both are 2 MW DIN-rail MCBs, but the 5SY8508-8 is a D-curve 8 A 1P+N unit; 5SY7210-7CC is a different rating and curve. Check the existing breaker's rating and tripping characteristic before swapping — the footprint matches, but the electrical fit may not.