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Description
Application Scenarios
At a large automotive manufacturing plant, the control cabinet for the conveyor system was experiencing frequent nuisance tripping on 1A control circuits during motor startup surges. The original B-curve breakers were too sensitive, causing production interruptions and unnecessary troubleshooting. After replacing with the SIEMENS 5SY4301-7, the C-curve characteristic—designed to withstand 5 to 10 times the rated current during short transient surges—eliminated the nuisance trips while maintaining reliable protection . The plant’s maintenance engineer reported: “We reduced downtime by 85% on these critical control circuits, and the tool-free removal feature means replacement takes seconds when needed.” This case underscores a key pain point: selecting the correct tripping characteristic is essential for maintaining production uptime. The SIEMENS 5SY4301-7 directly addresses this by offering Type C protection that tolerates legitimate motor and transformer inrush currents without compromising safety .
For system integrators designing control panels for pumps, compressors, or industrial lighting, the SIEMENS 5SY4301-7 provides a compact, reliable protection solution that integrates seamlessly with the SENTRON ecosystem. Its dual-terminal design accepts solid and stranded conductors up to 35mm², simplifying wiring and reducing termination failures . The IP20 front protection ensures safety in standard industrial enclosures, while the optional IP40 rating is achievable when mounted within distribution boards.
Parameter
| Main Parameters | Value/Description |
|---|---|
| Product Model | SIEMENS 5SY4301-7 |
| Manufacturer | Siemens |
| Product Category | Miniature Circuit Breaker (MCB) |
| Number of Poles | 3-pole – protects three-phase circuits |
| Rated Current (In) | 1A – suitable for low-current control and instrumentation circuits |
| Tripping Characteristic | Type C – short-circuit response: 5 to 10 times rated current |
| Rated AC Voltage | 400V AC – standard industrial supply voltage |
| Rated DC Voltage | 60V DC – suitable for DC control applications |
| Breaking Capacity | 10kA (Icn at 400V) – robust short-circuit protection |
| Breaking Capacity (at 230V) | 35kA – enhanced performance at lower voltages |
| Rated Insulation Voltage (Ui) | 440V – safety margin for system coordination |
| Mounting Type | DIN Rail – tool-free installation and removal |
| Dimensions (W x H x D) | 52.8 x 89.8 x 76 mm – compact footprint for panel space efficiency |
| Terminal Capacity | 0.75 – 35mm² (solid/stranded) – flexible conductor sizing |
| IP Rating | IP20 – finger-safe for touch protection |
| Power Loss | 3.6W – low heat dissipation per pole |
| Ambient Temperature Range | -40°C to +70°C – wide environmental tolerance |
| Energy Limiting Class | 3 – high current-limiting performance |
