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SKU: 3NE43276
The Siemens 3NE43276 is a premium-quality SITOR semiconductor protection fuse designed to provide ultra-fast protection for sensitive semiconductor devices and power electronic systems. As part of the renowned Siemens 3NE4 fuse series, this high-performance fuse offers a rated current of 250A and a rated voltage of 800V AC, making it an ideal solution for demanding industrial applications where rapid fault interruption is critical.
Modern industrial automation systems, power converters, variable frequency drives (VFDs), UPS systems, soft starters, rectifiers, and DC drives rely heavily on semiconductor components such as thyristors, diodes, IGBTs, and SCRs. These components are highly sensitive to short-circuit currents and electrical faults. The Siemens 3NE43276 SITOR Fuse is specifically engineered to protect these valuable devices by interrupting fault currents within milliseconds, helping to minimize equipment damage and reduce costly downtime.
Manufactured according to international standards including IEC 60269 and VDE 0636, the Siemens 3NE43276 delivers reliable and consistent performance even in harsh industrial environments. Its aR utilization category ensures dedicated short-circuit protection for semiconductor devices while maintaining excellent current-limiting characteristics.
One of the key advantages of the Siemens 3NE43276 is its exceptionally low let-through energy (I²t), which significantly reduces thermal and mechanical stress on protected semiconductor components during fault conditions. This feature helps extend equipment life, improve operational reliability, and lower maintenance costs across industrial facilities.
The fuse features an NH2 size design with slotted blade contacts and a front-mounted visual indicator that provides quick identification of fuse operation. This enables maintenance personnel to perform faster diagnostics and replacement procedures, minimizing system downtime and improving maintenance efficiency.
The Siemens 3NE43276 SITOR Fuse is widely used across numerous industrial sectors, including:
Siemens is globally recognized for delivering innovative and reliable electrical protection solutions. The 3NE43276 semiconductor fuse combines advanced SITOR technology with proven Siemens engineering expertise to ensure maximum protection for critical power electronic equipment. By providing extremely fast short-circuit interruption and effective current limitation, this fuse helps prevent catastrophic semiconductor failures and protects valuable industrial assets.
For industries that demand high reliability, operational safety, and reduced downtime, the Siemens 3NE43276 250A 800V SITOR Fuse is an excellent choice. Whether installed in automation systems, power electronics, or industrial control panels, this fuse delivers dependable protection and long-term performance that professionals trust worldwide.
Keywords: Siemens 3NE43276, Siemens SITOR Fuse, 3NE43276 Fuse, Siemens Semiconductor Protection Fuse, 250A 800V Fuse, Siemens 3NE4 Fuse, High-Speed Semiconductor Fuse, Industrial SITOR Fuse, Siemens Industrial Protection Fuse, Semiconductor Protection Device.
| Feature | Benefit |
|---|---|
| Ultra-Fast Fault Clearing | Protects sensitive semiconductor components from short circuits |
| Low Let-Through Energy (I²t) | Minimizes thermal stress on power electronics |
| High Breaking Capacity | Safely interrupts high fault currents |
| NH2 Standard Design | Easy replacement and installation |
| Visual Status Indicator | Quick maintenance and fault identification |
| aR Characteristic | Dedicated semiconductor short-circuit protection |
| Siemens SITOR Technology | Proven reliability for industrial power systems |
| Parameter | Specification |
|---|---|
| Product Name | Siemens SITOR Semiconductor Protection Fuse |
| SKU / Part Number | 3NE43276 |
| Series | 3NE4 SITOR |
| Fuse Type | Semiconductor Protection Fuse |
| Utilization Category | aR |
| Rated Current (In) | 250 A |
| Rated Voltage (Un) | 800 V AC |
| Breaking Capacity | High Breaking Capacity (HRC) |
| Fuse Size | NH2 |
| Design | Blade Contact / NH Fuse Link |
| Indicator | Front Visual Fuse Operation Indicator |
| Mounting Type | NH Fuse Base / Switch Disconnector Mounting |
| Protection Application | Semiconductor Devices (IGBTs, SCRs, Thyristors, Diodes) |
| Current Limiting | Yes |
| Low I²t Characteristic | Yes |
| Standards Compliance | IEC 60269, VDE 0636 |
| Body Material | High-Strength Ceramic Body |
| Contact Material | Silver-Plated Conductors |
| Operating Frequency | 50/60 Hz |
| Industrial Applications | VFDs, UPS Systems, Power Converters, Rectifiers, Soft Starters, DC Drives |
| Manufacturer | Siemens |
| Product Family | SITOR Semiconductor Protection Fuses |
| Country of Origin | Siemens Manufacturing Network (varies by production batch) |
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