Siemens SENTRON 5SY4350-8FA miniature circuit breaker, 3-pole, D tripping characteristic, 50 A rated current, 10 kA breaking capacity at 400 V AC, 3 width units.
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Breaking capacity per EN 60898 | 10 kA |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Parameter | Value |
|---|---|
| Rated current (AC) | 400 V |
| Rated voltage (AC, multi-phase) | 440 V |
| Rated frequency | 50/60 Hz |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 31 lbf·in |
| Terminal tightening torque, min. | 0.75 mm² |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| 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 10 kA breaking capacity (per EN 60898) tells you it can safely interrupt a fault current up to 10,000 A at 400 V without welding its contacts or cascading damage upstream. That's standard for most industrial panelboards but worth verifying against your available fault current.
The sealable design and touch-protection feature (finger-safe terminals) matter for panels that require a lockable isolator or meet VDE 0106 touch-safety requirements.
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
The 5SY3132-6 is a 3-pole D-curve MCB but at a lower current rating — 32 A vs 50 A. It shares the same 10 kA breaking capacity and DIN-rail footprint, so it can drop into the same panel without rewiring, but only if the load current is within 32 A.
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