Sinofuse RSZ307-01-J4P High-Speed Fuse, 350A 750V DC, aR Semiconductor Protection, Bolted Tag - Pack of 3

The Sinofuse RSZ307-01-J4P-350A is a high-performance, square-body DC high-speed fuse specifically engineered for the protection of power semiconductor devices. This fuse is a critical safety component frequently utilized in Electric Vehicle (EV) battery systems, power conversion equipment, and Energy Storage Systems (ESS). It provides industry-leading protection against overcurrent and short-circuit faults, ensuring the longevity and safety of high-value electronic circuits.

Key Features

• High-Speed DC Performance: Optimized for DC power applications up to 750V, delivering rapid response times to mitigate damage during high-energy electrical faults.
• aR Utilization Category: Designed as a partial-range semiconductor fuse (aR), offering high-speed clearing and low let-through energy () characteristics.
• Automotive Grade Durability: Compliant with GB/T 31465 and other relevant standards. It is built to withstand mechanical vibration and thermal cycling common in mobile and industrial environments.
• Precision Mounting: Features the J4P-type bolted tag (double-hole blade) configuration for secure installation using M8 hardware, ensuring low contact resistance and stable operation.
• Status Indication: Includes a visual fault indicator for immediate identification of the fuse state, facilitating efficient troubleshooting and system maintenance.

Technical Specifications

• Manufacturer: Xi'an Sinofuse Electric Co., Ltd.
• Product Model: RSZ307-01-J4P-350A
• Rated Current: 350 A
• Rated Voltage: 750 V DC
• Utilization Category: aR (High-speed semiconductor protection)
• Breaking Capacity: ≥ 50kA (L/R = 5~10ms)
• Power Dissipation: 58 W (at rated current)
• Standard Compliance: CE, RoHS, GB/T 31465, IEC 60269-4
• Mounting Type: Bolted Tag (J4P Double-hole blade for M8 bolts)
• Operating Conditions: Suitable for temperatures from -40°C to +120°C