The Siemens 3NE43346 SITOR Semiconductor Fuse Link is a high-performance protection device specifically engineered for safeguarding sensitive semiconductor components against short-circuit currents and electrical faults. As part of the trusted Siemens SITOR 3NE4 Series, the 3NE43346 delivers ultra-fast fault interruption and excellent current-limiting performance, making it ideal for modern power electronics applications. The fuse is rated at 500A and 800V AC, with an aR utilization category, providing specialized protection for semiconductor devices that require extremely rapid fault clearing.
Designed for demanding industrial environments, the Siemens 3NE43346 is widely used in variable frequency drives (VFDs), power converters, inverters, rectifiers, UPS systems, soft starters, and industrial automation equipment where semiconductor protection is critical. SITOR fuses are specifically developed to protect expensive power semiconductors from the effects of short circuits through their super-fast disconnect characteristics.
Unlike conventional HRC fuses, semiconductor protection fuses are engineered to react significantly faster to fault conditions. The Siemens 3NE43346 minimizes thermal and electrical stress on semiconductor devices by rapidly limiting fault current and reducing let-through energy (I²t).
This fuse is ideally suited for protecting:
Its aR characteristic ensures optimized short-circuit protection for semiconductor applications while helping maintain equipment reliability and operational continuity.
The 3NE43346 is manufactured according to Siemens' stringent quality standards and complies with IEC 60269 and VDE 0636 requirements. It is designed for installation in fuse bases, switch disconnectors with fuses, and direct busbar mounting applications.
Key performance benefits include:
These characteristics make the fuse ideal for protecting high-value semiconductor equipment in critical industrial installations.
The Siemens 3NE43346 Semiconductor Fuse is suitable for:
At SB Smart, we provide genuine Siemens electrical products, semiconductor protection solutions, industrial automation components, and power distribution equipment. The Siemens 3NE43346 SITOR Fuse Link delivers dependable short-circuit protection, rapid fault interruption, and exceptional reliability for critical semiconductor applications.
Whether you are protecting industrial drives, converters, inverters, UPS systems, or other power electronic equipment, the 3NE43346 offers the quality, performance, and safety expected from Siemens SITOR technology.
SB Smart supplies industrial electrical products to customers across India, including Faridabad, Delhi NCR, Noida, Gurgaon/Gurugram, Ghaziabad, Manesar, Mumbai, Pune, Ahmedabad, Vadodara, Surat, Jaipur, Chandigarh, Ludhiana, Hyderabad, Bengaluru/Bangalore, Chennai, Kolkata, Indore, Lucknow and other major industrial cities.
The Siemens 3NE43346 can be considered by OEMs, panel builders, electrical contractors, automation integrators, system integrators, machinery manufacturers and industrial maintenance teams requiring high-current semiconductor protection solutions.
1. What is Siemens 3NE43346 used for?
The Siemens 3NE43346 is a semiconductor protection fuse designed to protect suitable power semiconductor components against damaging overcurrent and short-circuit conditions.
2. What is the rated voltage of 3NE43346?
The specified rated voltage is 800 V.
3. What is the rated current of Siemens 3NE43346?
The specified rated current is 500 A.
4. What type of fuse is 3NE43346?
It is a 3NE4 type semiconductor protection fuse from Siemens.
5. Where are 500 A semiconductor protection fuses used?
They can be used in suitable high-current power converters, industrial rectifiers, drive systems, thyristor equipment and other power-electronic applications.
6. How should the 3NE43346 be selected?
Selection should consider the operating voltage and current, protected semiconductor device, prospective fault current, installation conditions and required coordination with the equipment.
7. Can SB Smart supply Siemens 3NE43346 across India?
Yes, SB Smart caters to industrial electrical product requirements across major cities and industrial locations throughout India, subject to product availability and order requirements
| Specification | Details |
|---|---|
| Product Name | SITOR Semiconductor Fuse Link |
| Manufacturer | Siemens |
| Product Series | 3NE4 |
| Model Number | 3NE43346 |
| Fuse Type | Semiconductor Protection Fuse |
| Rated Current | 500A |
| Rated Voltage | 800V AC |
| Utilization Category | aR |
| Standard Compliance | IEC 60269 / VDE 0636 |
| Mounting Type | Fuse Base / Switch Disconnector / Busbar |
| Application | Semiconductor Protection |
| Protection Type | Short-Circuit Protection |
| Suitable For | IGBT, SCR, Thyristor & Diode Protection |
| Industrial Application | Yes |
| Brand | Siemens |
| Condition | New & Genuine Product |
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