Siemens SITOR 3NE3337-8 aR Fuse, 710A 1000VAC, Ultrafast Semiconductor Protection, NH Size 3 - Pack of 3

Siemens SITOR 3NE3337-8 aR Fuse, 710A 1000VAC

The Siemens SITOR 3NE3337-8 aR Ultrafast Fuse Link is a critical protective solution engineered for the high-speed and precise safeguarding of power semiconductors in industrial and high-power applications. Belonging to the esteemed SITOR series, this NH Size 3 fuse provides unparalleled reliability and rapid fault clearing to prevent severe damage to sensitive power electronics such as diodes, thyristors, and IGBTs. Featuring a robust ceramic body and silver-plated contact blades, it ensures consistent, efficient, and safe operation within AC circuits up to 1000V, thereby enhancing system longevity and reducing costly downtime.

Key Features:

• Ultrafast aR Characteristic: Specifically tailored for the partial-range protection of power semiconductors, offering immediate interruption of overcurrents and short circuits.
• High Breaking Capacity: Guarantees superior system integrity and safety with an impressive breaking capacity of 200kA at 1000VAC.
• Optimized Low I²t Values: Boasts an exceptionally low melting integral (I²t), which drastically limits the let-through energy during fault conditions, providing maximum protection for vulnerable semiconductor devices.
• Efficient Power Dissipation: Designed for high efficiency, exhibiting a rated power loss of 115W at nominal current, which contributes to lower operating temperatures and improved energy efficiency.
• Robust NH Size 3 Construction: Manufactured with a high-quality ceramic body and durable silver-plated contact blades, ensuring mechanical strength, excellent insulation properties, and reliable electrical connections for prolonged service life.
• International Standards Compliance: Fully compliant with IEC 60269-4, the standard specifically for fuses protecting semiconductor devices.
• Broad Application Versatility: Ideal for a wide range of high-power industrial electronic systems demanding stringent and rapid semiconductor protection.

Detailed Technical Specifications:

Electrical Characteristics:

• Manufacturer: Siemens
• Series: SITOR
• Part Number: 3NE3337-8
• Rated Current (IN): 710A
• Rated Voltage (VAC): 1000V AC
• Fuse Characteristic: aR (Ultrafast, Partial Range Breaking Capacity for Semiconductor Protection)
• Breaking Capacity (Interrupting Rating): 200kA @ 1000VAC
• Melting Integral (I²t) @ 1000V: 31000 A²s (typical for 0 -> Ip at rated voltage)
• Rated Power Loss (at rated current): 115W
• Operating Temperature Range: -20°C to +50°C (for the fuse with typical mounting conditions)

Mechanical Specifications:

• Body Material: Ceramic
• Contact Blades: Silver-plated
• Form Factor: NH Fuse Link
• Size: NH Size 3 (Standardized dimensions conforming to DIN 43620)
• Mounting: Compatible with standard NH fuse bases/holders (e.g., Siemens 3KL/3KF series designed for NH Size 3)

Standards & Compliance:

• International Standards: IEC 60269-1, IEC 60269-4 (Fuses for the protection of power semiconductors)
• Certification: RoHS Compliant

Applications:

The Siemens SITOR 3NE3337-8 aR Fuse Link is an indispensable protective component for high-power semiconductor-based systems across a diverse array of industrial and commercial applications, including:

• Advanced power converters, inverters, and rectifiers
• Industrial motor control drives (VFDs) and soft starters
• Uninterruptible Power Supplies (UPS) for critical infrastructure and data centers
• Frequency converters in heavy manufacturing and processing plants
• Specialized industrial welding equipment and electrolysis processes
• Large-scale renewable energy installations, such as utility-scale solar inverters and wind turbine converters
• Any system where the rapid and precise protection of power semiconductor components from destructive overcurrents is critical.

This product is supplied as a pack of 3 units.