Bussmann 170M3772 Eaton Series High-Speed Square Body Fuse, 550A Class aRThe Bussmann 170M3772 is an Eaton series high-speed square body fuse engineered for semiconductor protection in demanding industrial power systems. Rated 550A with a voltage rating of 700V (UL) / 690V (IEC), this Class aR fuse delivers a 200 kAIC interrupting rating with blade end x blade end terminations for reliable, high-speed circuit protection. Built with a square body construction and center bolted tags, it is UL Recognized and CE Marked for use in accompanied (backup) protection of power semiconductor devices.Key FeaturesAmperage Rating: 550A rated for high-current semiconductor protection applications.Voltage Rating: 700V (UL) / 690V (IEC) AC for use in high-voltage industrial power circuits.Interrupting Rating: 200 kAIC provides robust short-circuit protection.Fuse Shape: Square body construction with center bolted tags and blade end x blade end termination.Utilization Category: Class aR (accompanied semiconductor protection) for coordinated backup protection of power semiconductor devices.Let-Through Energy: Clearing I2t of 230000 at 660V and Pre-arc I2t of 34000 for precise current-limiting performance.Watt Losses: 75W.Certifications & ComplianceUL RecognizedCE MarkedTechnical SpecificationsAmperage Rating: 550 AApplication: semiconductor protectionCertifications: UL RecognizedClearing I2t: 230000 at 660 VCompliances: CE MarkedFuse Shape: Square body, center bolted tagsInsulated Metal Gripping Lugs (IMGL): NoPackaging Type: StandardPre Arc I2t: 34000Product Height: 60 mmProduct Length Depth: 92 mmProduct Weight: 176 gProduct Width: 163 mmUtilization Category: aR (accompanied semiconductor protection)Voltage Rating: 690 VVoltage Type: ACWatt Losses: 75 WTypical ApplicationsSemiconductor Protection CircuitsAccompanied (Backup) Protection of Power Semiconductor DevicesHigh-Speed Industrial Fuse Protection700V/690V AC Power Distribution SystemsWhy Bussmann?Bussmann by Eaton engineers this high-speed square body fuse for the demanding coordinated protection semiconductor devices require, backed by a 200 kAIC interrupting rating and Class aR utilization category. UL Recognized and CE Marked, the 170M3772 delivers the precise clearing and pre-arc I2t characteristics power electronics designers depend on for code-compliant, reliable circuit protection.