The 10 kA breaking capacity at 400 V AC (per EN 60898) tells you it can safely interrupt a fault current up to that level; for UL 1077 / CSA C22.2 No.235 applications the rating is 5 kA. The 3-pole design switches all three phases simultaneously, with no neutral conductor switching — standard for a 3-phase load feed. The 76 mm depth and 54 mm width (3 MW) mean it fits standard 18 mm-per-module DIN-rail enclosures. The quick assembly system and any mounting position give flexibility in tight cabinets — no derating needed for horizontal or inverted orientation.
Siemens 5SY4306-7CC SENTRON MCB, C-Curve 3P 400V 10kA
MPN5SY4306-7CC
Siemens SENTRON 5SY4306-7CC, 3-pole miniature circuit breaker, C-curve, 400 V AC, 10 kA per EN 60898, 3 MW units.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 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) | C |
| Breaking capacity per EN 60898 | 10 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) | 1.2 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
Where can I buy 5SY4306-7CC and how do I get a price?
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Will 5SY4306-7CC drop into a panel specified around 5SY4140-7 without rewiring?
Both are 3-pole SENTRON MCBs on a 3 MW DIN-rail footprint, so the mechanical fit is the same. The 5SY4140-7 is a higher-current variant (40 A vs 6 A for this part); verify the load rating before swapping — the physical drop-in is fine, but the protection curve must match the circuit.
What compliance documentation does this brand provide for 5SY4306-7CC?
The part carries approvals per EN 60898, UL 1077, and CSA C22.2 No.235. It is halogen-free and silicon-free. RoHS and REACH compliance documentation is standard with Siemens SENTRON series breakers.
MPN
5SY4306-7CC