"The hassle of frequently changing fuses will be reduced with a high speed semiconductor fuses from Bussmann. With fast acting fuse speed, 250A fuse amps, an interrupt rating of 100kA at 150VAC, 100kA at 80VDC, 20kA at 150VDC, and fwa series, this high speed semiconductor fuses is a must-have. It is a nonindicating high speed semiconductor fuses. It has a single element. The voltage rating is 150vac/dc. As far as size goes, it is 1"" in diameter. Functionally equal to Mersen/Ferraz Shawmut A15QS, Littlefuse L15S, you'll thoroughly enjoy its use. When it comes to product classification, this item can be grouped as High Speed. The body is made of ceramic material. Standards include: CE, UL Recognized. This high speed semiconductor fuses also meets the following environmental guidelines: RoHS Compliant.FeaturesElement: SingleFuse Amps: 250AItem: High Speed Semiconductor FusesLength: 2-21/32""Body Material: CeramicBody Style: Bolt OnClass: High SpeedSeries: FWAFunctionally Equal To: Mersen/Ferraz Shawmut A15QS, Littlefuse L15SStandards: CE, UL RecognizedDiameter: 1""Green Environmental Attribute: RoHS CompliantIndicating / Nonindicating: NonindicatingRejection / Nonrejection: NonrejectionFuse Voltage Rating: 150VAC/DCFuse Speed: Fast ActingFuse Interrupt Rating: 100kA at 150VAC, 100kA at 80VDC, 20kA at 150VDC"