Sinofuse RSZ307-01-J4P High-Speed Fuse, 550A 750V DC, aR Fast-Acting Semiconductor Protection - Pack of 3

The Sinofuse RSZ307-01-J4P-550A is a high-performance, square-body DC high-speed fuse engineered for superior circuit protection in Electric Vehicles (EV) and energy storage systems. Designed by Xi'an Sinofuse Electric Co., Ltd., this fuse provides critical short-circuit protection for power batteries, drive systems, and auxiliary circuits. It is characterized by its compact volume, low temperature rise, and exceptional breaking capacity.

Key Features

• High-Speed DC Protection: Specifically designed for DC applications up to 750V, ensuring rapid interruption of fault currents in power electronics and battery systems.
• aR Utilization Category: Features a partial-range protection (aR) characteristic, optimized for safeguarding semiconductors by providing high-speed clearing and low let-through energy.
• Reliable for Transportation: Optimized to meet GB/T 31465 and automotive safety standards, offering robust resistance to mechanical shock and vibrations (up to 10g acceleration).
• Efficient Mounting: Utilizes a bolted tag (J4P) mounting style, designed for secure M8 screw/nut installation with a recommended torque of 10N.m to ensure stable electrical contact.
• Integrated Indication: Equipped with a built-in visual fault indicator to allow maintenance personnel to quickly identify blown fuses, reducing system downtime.

Technical Specifications

• Manufacturer: Xi'an Sinofuse Electric Co., Ltd.
• Model Series: RSZ307-01-J4P
• Rated Current: 550 A
• Rated Voltage: 750V DC
• Utilization Category: aR (High-speed semiconductor protection)
• Breaking Capacity: ≥ 50kA (L/R = 5~10ms)
• Standard Compliance: CE, RoHS, GB/T 31465
• Mounting Type: Bolted Tag (Double-hole blade for M8 bolts)
• Operating/Storage Temperature: -40°C to +120°C (Storage up to +70°C for packaging)
• Pollution Degree: Level III