The 5SY4440-7: Dimensions are 72 mm wide (4 modular width units) × 76 mm deep, so it fits the same DIN footprint as other SENTRON 4‑pole MCBs.
Thermal derating at elevated ambient
Keep that in mind for washdown areas or outdoor enclosures.
Siemens 5SY4440-7 SENTRON 4P C40 MCB, 40A 10kA
MPN5SY4440-7
Active
Siemens SENTRON 5SY4440-7, 4-pole miniature circuit breaker, C-curve, 40A, 10kA per EN 60898.
$347.35Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Pole configuration | 4P |
| Rated voltage, AC (multi-phase) | 440 V |
| Parameter | Value |
|---|---|
| Tripping characteristic (trip curve) | C |
| Energy limitation class | 3 |
| Overvoltage category | III |
| Pollution degree | 3 |
| Degree of protection (IP) | IP20, with connected conductors |
| Parameter | Value |
|---|---|
| Width in modular units | 4 |
| Width | 72 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Fastening / mounting method | Quick assembly system |
| Mounting position | any |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Tightening torque, max. | 75 °C |
| Tightening torque, min. | -40 °C |
| 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 |
|---|---|
| Power loss per pole, AC (hot state, at In) | 3.5 W |
Product details
Frequently asked questions
What is 5SY4440-7's listed depth and width?
Depth is 76 mm and width is 72 mm (4 modular width units).
What standards does this breaker comply with?
It complies with IEC / EN 60898‑1, IEC / EN 60947‑2, and UL1077.
MPN
5SY4440-7