Gould Shawmut Amptrap Semiconductor Fuse A50QS400-4R

The Gould Shawmut Amptrap A50QS400-4R is a high-performance semiconductor protection fuse designed for safeguarding sensitive electronic components such as diodes, thyristors, and power semiconductors in industrial applications. This fast-acting fuse features a current rating of 400 Amps and voltage ratings up to 500 VAC/VDC, making it ideal for use in rectifiers, inverters, motor drives, and power supplies where rapid fault clearing is essential to prevent damage from short circuits or overloads. Key advantages include its low I²t let-through for minimal energy release during faults, high interrupting capacity (200kA AC, 87kA DC), and compact design for easy integration into fuse holders. Compared to standard fuses, the A50QS series offers superior protection for semiconductor devices due to its quick response time and rejection features that prevent incorrect fuse installation. Benefits include enhanced system reliability, reduced downtime, and compliance with UL and CSA standards. Drawbacks may include higher cost than general-purpose fuses and the need for precise matching to application requirements. This model replaces the A50P400-4 and is suitable for demanding environments like renewable energy systems or industrial automation. Condition: New, based on visual analysis showing no wear, clean labeling, and intact packaging indicators.