It is not intended for motor-starting duty (where C- or D-curves handle the higher inrush). Breaking capacity is dual-rated: 10 kA per EN 60898-1 and 20 kA per IEC 60947-2. The 20 kA figure under 60947-2 is the one that matters for industrial panel SCCR calculations — it tells you this MCB can safely interrupt a fault up to 20 kA at 400 V AC without welding contacts or cascading upstream. The 10 kA EN rating is the residential/commercial reference. Rated for 400 V AC (440 V max in multi-phase or single-phase operation), 50/60 Hz. DC rating is 60 V operating, 72 V max, with 15 kA breaking capacity per IEC 60947-2 — useful for DC auxiliary circuits in the same panel.
Siemens 5SY4325-6KK11 SENTRON MCB, 3P B-Curve, 10kA IEC
MPN5SY4325-6KK11
Siemens SENTRON 5SY4325-6KK11, 3-pole miniature circuit breaker, B-curve, 10 kA (EN 60898-1) / 20 kA (IEC 60947-2), 400 V AC, 3 modular width units.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | B |
| Breaking capacity per EN 60898 | 10 kA |
| Breaking capacity per IEC 60947-2 | 20 kA |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Energy limitation class | 3 |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated voltage (AC, multi-phase) | 440 V |
| Voltage type (AC/DC) | AC |
| Supply frequency range | 50/60 Hz |
| Power loss per pole at rated current (AC, hot) | 2.4 W |
| Mechanical service life (operating cycles, typ.) | 10 000 |
| Neutral conductor switching | No |
| Rated voltage (AC, single-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 |
| Accepts supplementary devices | 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 |
| Vibration resistance (IEC 60068-2-6) | ±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz |
Product details
Frequently asked questions
Will 5SY4325-6KK11 drop into a panel specified around 5SY6332-7CC?
Both are 3-pole SENTRON MCBs on the same DIN-rail footprint (3 modular width units). The 5SY4325-6KK11 is a B-curve device; the 5SY6332-7CC is a different curve/rating variant. They share the same mechanical envelope and terminal arrangement, so no rewiring is needed for the panel layout — but verify the trip curve and current rating match the circuit protection requirements before swapping.
MPN
5SY4325-6KK11