75A 500V FUSE A50QS75-4Y

Product Description

The A50QS75-4Y is a 75A, 500V high-speed semiconductor fuse from the Mersen Amp-Trap® A50QS series, designed to provide ultra-fast protection for sensitive power semiconductor devices. It is commonly used in variable frequency drives (VFDs), UPS systems, inverters, rectifiers, DC drives, and industrial power conversion equipment, where rapid fault interruption is essential to protect IGBTs, SCRs, diodes, and other semiconductor components.

Key Features

• High-speed semiconductor protection fuse (aR class)
• Rated current: 75A
• Rated voltage: 500VAC / 500VDC
• Ultra-fast fault clearing for semiconductor devices
• Low I²t for maximum equipment protection
• High interrupting capacity for severe fault conditions
• Blade (Type 4Y) bolted terminal design
• Compact Form 101 construction for industrial applications
• Low power loss for improved efficiency and reduced heating
• Excellent cycling performance for long service life
• Non-indicating fuse design
• Suitable for continuous-duty industrial operation
• Ideal for motor drives, UPS systems, inverters, converters, and rectifiers

Specifications

• Product Type: High-Speed Semiconductor Fuse
• Model: A50QS75-4Y
• Manufacturer: Mersen
• Series: Amp-Trap® A50QS
• Rated Current: 75A
• Rated Voltage: 500VAC / 500VDC
• Fuse Class: aR (Semiconductor Protection)
• Speed: Fast Acting / High Speed
• Mounting Type: Bolted Blade (Type 4Y)
• Terminal Type: Blade terminals
• Interrupt Rating: Up to 200kA AC, 87kA DC (model rated)
• Frequency: 50/60Hz
• Body Material: Fiberglass / High-strength insulating body
• Standards: UL Recognised, CSA Certified, RoHS Compliant
• Application: Variable frequency drives (VFDs), UPS systems, inverters, rectifiers, DC drives, motor controllers, industrial power supplies, semiconductor protection equipment