Siemens SENTRON 5SY4340-7CC, 3-pole miniature circuit breaker, 40 A rated current, C tripping characteristic, 10 kA breaking capacity per EN 60898, 440 V AC, 50/60 Hz.
| 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) | 40 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 5SY4340-7CC: The 40 A rating at 35 °C is the base value; at 40 °C it derates to 37.6 A, at 50 °C to 35.04 A, and at 55 °C to 33.68 A.
Mounting position any — horizontal or vertical rail orientation is fine. Sealable — a lead seal can be applied to the toggle to prevent unauthorized reset after a trip.
We source this part through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here.
The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm. The width is 54 mm (3 modular units), height 90 mm.
The part is designed to EN 60898 (breaking capacity 10 kA) and carries overvoltage category III, pollution degree 3 ratings. It is halogen-free and silicon-free. For specific RoHS/REACH/UL declarations, request the manufacturer's compliance certificate at quote time — the evidence does not list those marks directly.
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