FERRAZ SHAWMUT PC31UD69V400D1A L300022 690VAC 400A

Mersen Protistor High-Speed Semiconductor Fuse 400A Description The Mersen PC31UD69V400D1A is a high-performance Protistor square-body fuse designed for the critical protection of power semiconductors. Rated at 400A and 690V AC, this ultra-rapid fuse (aR class) provides excellent safeguarding for components like diodes, thyristors, and IGBTs in high-power applications such as inverters, rectifiers, and variable speed drives. Its high interrupting rating of 200kA ensures safety even under extreme short-circuit conditions. Order now from profideals for expert support and fast delivery. Specifications Manufacturer: Mersen (formerly Ferraz Shawmut) Part Number: PC31UD69V400D1A Reference Number: L300022 Voltage Rating: 690V AC Current Rating: 400A Interrupting Rating: 200kA Fuse Class: aR (Ultra-Rapid) Fuse Size: 31 Mounting: Blade Terminals Label Info Brand: Ferraz Shawmut Protistor Model: PC31UD69V400D1A Voltage: 690V AC Current: 400A Standard: IEC60269-4 Application This fuse is ideal for protecting power conversion equipment, including motor drives, UPS systems, soft starters, and solid-state relays from short-circuit faults. Country of Origin Made in France. CO2 Impact Choosing this component saves approximately 20.0 kg of CO2, equivalent to the emissions of driving a car for 100 km. This is a sustainable choice for your industrial needs. Availability Available from stock for immediate dispatch. FAQ What does the ‘aR’ class rating signify for this PC31UD69V400D1A fuse?The ‘aR’ class rating indicates it is an ultra-rapid fuse designed specifically for partial-range short-circuit protection of semiconductors like thyristors, diodes, and transistors. It does not provide overload protection and must be used in series with another device (like a circuit breaker or gG fuse) for that purpose. Is this fuse a direct replacement for other brands with similar 400A, 690V ratings?While the voltage and current ratings are primary specifications, for semiconductor protection fuses, it is crucial to also match the I2t (let-through energy) and clearing characteristics. Always consult the technical datasheets of both the original fuse and this Mersen fuse to ensure the protection levels are equivalent before making a substitution. How can I verify if the fuse has tripped?This Mersen Protistor fuse is equipped with a visual blown fuse indicator. A small red plunger on the top of the fuse body will pop out when the fuse has operated. In its normal, unused state, this indicator is flush with the fuse body. profideals is not an authorized distributor, reseller, or representative of the products featured on this website. All product names, trademarks, brands, and logos used on this site are the property of their respective owners. Last Update: Friday, March 13, 2026