Mersen Protistor High-Speed Semiconductor Fuse

Description

The Mersen PC33UD69V900D1A is a Protistor series square body fuse link designed for the high-performance protection of power semiconductors. It offers an ultra-rapid (URD) response to overcurrent conditions, safeguarding sensitive components such as diodes, thyristors, and IGBTs. This fuse is engineered for high cycling capability and low watt loss, making it suitable for demanding industrial applications.

Specifications

• Manufacturer: Mersen
• Part Number: PC33UD69V900D1A
• Alternate Part Number: Y300263C
• Voltage Rating: 690V AC
• Current Rating: 900A
• Interrupting Rating (IR): 200kA
• Fuse Class: URD / gR (For semiconductor protection)
• Body Style: Square Body Blade, Size 33
• Standard: IEC 60269-4

Label Info

• Brand: Ferraz Shawmut (Now Mersen)
• Product Line: Protistor
• Model: PC33UD69V900D1A
• Certifications: CE, cURus

Application

This fuse is specifically designed for protecting power conversion equipment including variable speed drives, UPS systems, rectifiers, and inverters against short-circuit currents.

Country of Origin

Made in France.

CO2 Impact

Opting for a refurbished Mersen fuse link like this one prevents the emission of approximately 48 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions from driving a standard car for about 240 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

'URD' stands for Ultra Rapid Fuse. It indicates that the fuse has extremely fast-acting clearing characteristics designed specifically to protect sensitive and expensive power semiconductor devices from damaging short-circuit currents.

No, this is a special purpose fuse. Its gR/URD characteristics are tailored for semiconductor protection. Using it in a general purpose application (like for motors or transformers) may lead to nuisance tripping and is not recommended.

While not listed on the label, the manufacturer's datasheet for Size 33 fuses typically specifies a mounting torque. It is critical to consult the official Mersen datasheet for the PC33UD69V900D1A to ensure proper electrical connection and heat dissipation, as incorrect torque can lead to overheating and premature failure.

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Last Update: Friday, March 13, 2026