Siemens SENTRON 5SY4301-7KK11 miniature circuit breaker, 3-pole, tripping characteristic C, rated current 1 A AC, breaking capacity 10 kA per EN 60898 / 35 kA per IEC 60947-2, for railway applications.
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | C |
| Breaking capacity per EN 60898 | 10 kA |
| Breaking capacity per IEC 60947-2 | 35 kA |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Energy limitation class | 3 |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 1 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 |
The 1 A rating holds at 35 °C. Above that, the MCB derates: 0.95 A at 40 °C, 0.93 A at 45 °C, 0.9 A at 50 °C, 0.88 A at 55 °C, and 0.85 A at 60 °C. If your panel ambient runs 50 °C, figure 0.9 A continuous — a 10 % reduction that can nuisance-trip a borderline load.
10 kA per EN 60898 and 35 kA per IEC 60947-2. The higher figure applies when the MCB is used in an industrial distribution panel per the IEC standard.
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Both are 3-pole SENTRON MCBs with the same 54 mm width and DIN-rail mounting. The 5SY4301-7KK11 is a 1 A C-curve unit for railway applications; the 5SY4301-7CV is a different rating and curve. Mechanically they share the same footprint, but verify the electrical ratings match your circuit before swapping.
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