Bussmann 170M4490 Eaton Series High-Speed Square Body Fuse, Class aR, 250A

Bussmann 170M4490 Eaton Series High-Speed Square Body Fuse, Class aR, 250A

The Bussmann 170M4490 is an Eaton series high-speed square body fuse engineered for demanding semiconductor protection applications. Rated 250A with a dual voltage rating of 700V (UL) and 690V (IEC), this Class aR fuse delivers a 100 kAIC interrupting rating for dependable fault-current clearing in accompanied semiconductor protection circuits. Its square body design with flush end contacts, together with UL Recognized and CE Marked construction, makes it a reliable choice for professional power electronics and industrial electrical installations.

Key Features

• Amperage Rating: 250A rated for high-current semiconductor circuit protection.
• Voltage Rating: 700V (UL) / 690V (IEC) certified rating, with a manufacturer voltage rating of 1250V for demanding power circuits.
• Interrupting Rating: 100 kAIC for dependable high fault-current interruption.
• Utilization Category: Class aR (accompanied semiconductor protection) for coordinated semiconductor device protection.
• Fuse Shape: Square body with flush end contacts for standard high-speed fuse block mounting.
• I²t Characteristics: Pre-arc I²t of 7750 and clearing I²t of 46000 at 1000V / 61500 at 1250V for precise semiconductor coordination.
• Watt Losses: 60W rated power loss.
• Compact Dimensions: 170 mm length, 72 mm width, 52 mm height, and 1208 g weight.

Certifications & Compliance

• UL Recognized
• CE Marked

Technical Specifications

• Amperage Rating: 250 A
• Application: semiconductor protection
• Certifications: UL Recognized
• Clearing I2t: 46000 at 1000 V, 61500 at 1250 V
• Compliances: CE Marked
• Fuse Shape: Square body, flush end contacts
• Insulated Metal Gripping Lugs (Imgl): No
• Packaging Type: Standard
• Pre Arc I2t: 7750
• Product Height: 52 mm
• Product Length Depth: 170 mm
• Product Weight: 1208 g
• Product Width: 72 mm
• Utilization Category: aR (accompanied semiconductor protection)
• Voltage Rating: 1250 V
• Voltage Type: AC
• Watt Losses: 60 W

Typical Applications

• Semiconductor Device Protection
• Power Electronics and Drive Systems
• Industrial Motor Control Circuits
• High Fault-Current Interruption Applications

Why Bussmann?

Bussmann by Eaton is a trusted name in circuit protection, and the 170M4490 reflects that standard with UL Recognized and CE Marked construction built for precise, high-speed fault clearing. Its Class aR utilization category, defined pre-arc and clearing I²t characteristics, and 100 kAIC interrupting rating give engineers the coordinated semiconductor protection that professional power electronics and industrial applications require.