Product Description
The Ferraz Shawmut DN000UB69V250V (Mersen Part Number B330028) is a 250A, 690V AC ultra-fast acting aR fuse designed to protect power semiconductors such as diodes, thyristors, and IGBT devices. Its NH000 square-body design with bolted blade terminals provides reliable electrical connections and fast, precise protection in demanding industrial applications. Built with a ceramic body and silver-plated copper terminals, this fuse ensures both safety and long-term performance.
Features & Specifications:
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Ampere Rating: 250 A
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Rated Voltage (AC): 690 V
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Speed / Characteristic: aR (Ultra-fast acting for semiconductor protection)
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Interrupting Rating: 200 kA at 690 V AC
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Melting I²t: 9860 A²s
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Clearing I²t at Rated Voltage: 52000 A²s
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Mounting Style: Bolted blade terminals, NH000 size
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Body Material: Ceramic
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Terminals: Silver-plated copper with L-brackets/blades
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Additional Features: Built-in indicator/striker for operating a field-mountable microswitch for remote signaling
