Siemens SENTRON 5SY6 series miniature circuit breaker, 5SY6663-8, 63 A, D tripping characteristic, 4-pole (3P+N), 400 V AC, 10 kA IEC 60947-2, 6 kA EN 60898, 72 mm wide, IP20.
| Parameter | Value |
|---|---|
| Type / order code | 5SY6 |
| Brand name | SENTRON |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Pole configuration | 3P+N |
| Rated current (In), AC | 400 V |
| Rated current (In), AC | 63 A |
| Rated voltage, AC (multi-phase) | 440 V |
| Rated voltage, AC (single-phase) | 440 V |
| Rated voltage, DC (max.) | 72 V |
| Voltage type | AC |
| Rated frequency | 50/60 Hz |
| Parameter | Value |
|---|---|
| Tripping characteristic (trip curve) | D |
| Rated breaking capacity (Icn), per EN 60898 | 6 kA |
| Rated breaking capacity, per IEC 60947-2 | 10 kA |
| Breaking capacity, AC (UL 1077 / CSA C22.2 No.235) | 5 kA |
| Overvoltage category | III |
| Degree of protection (IP) | IP20, with connected conductors |
| Neutral conductor switching | Yes |
| Touch protection | Yes |
| Parameter | Value |
|---|---|
| Width in modular units | 4 |
| Width | 72 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Influence of ambient temperature (derating) | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
| Parameter | Value |
|---|---|
| Mechanical service life (switching cycles, typ.) | 10 000 |
The Siemens SENTRON 5SY6663-8 is a 4-pole (3P+N) miniature circuit breaker rated 63 A with a D tripping characteristic, designed for 400 V AC industrial and mechanical engineering panels.
Snaps onto DIN rail via the quick assembly system — 4 width units (72 mm wide, 90 mm tall, 76 mm deep) with 70 mm installation depth. IP20 with conductors connected; any mounting position works, and the -25 to +55 °C ambient range covers most unventilated enclosures.
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76 mm, with an installation depth of 70 mm. The overall dimensions are 72 mm wide by 90 mm tall.
Solid and stranded conductors from 0.75 to 35 mm² at both top and bottom combined terminals.
The MCB carries IEC 60947-2 (10 kA), EN 60898 (6 kA), and UL 1077 / CSA C22.2 No.235 (5 kA) ratings. It is halogen-free and silicon-free. Standard Siemens declarations (CE, UKCA) apply; specific RoHS/REACH declarations available on request.
The 5SY4140-7 is a 4-pole SENTRON MCB but rated 40 A with a B curve — lower current and different trip characteristic. It will not drop into the same slot without recalculating the branch protection and coordination study. For a 63 A D-curve replacement, the 5SY6663-8 is the correct order code.
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