SINOFUSE RS309-MD-EVS-630A-C Fuse, 630A 500VDC, High-Speed Bolted-Blade, EV/HEV Protection - Pack of 3

Product Overview The SINOFUSE RS309-MD-EVS-630A-C occupies the high-capacity end of the RS309 series, designed specifically for heavy-duty overcurrent protection in Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV) power architectures. Manufactured by Xi'an Sinofuse Electric Co., Ltd., this 630A high-speed fuse is engineered to safeguard the main battery bus and high-power distribution systems against the catastrophic effects of short circuits and high-magnitude faults.

Engineering and Durability Constructed with a premium reinforced ceramic body, the RS309-MD-EVS 630A-C features internal high-purity silver melting elements that provide precise and ultra-fast interruption. The "C" configuration indicates a specific bolted-blade mounting style designed for low-impedance electrical contact and robust mechanical stability. Every component is optimized to endure the extreme thermal cycles and high-intensity vibration profiles characteristic of heavy electric transit and industrial machinery.

Advanced Protection Characteristics With a substantial 630A current rating and a 500VDC voltage capacity, this fuse provides exceptionally fast response times. It effectively limits the let-through energy, protecting expensive downstream power electronics—such as high-power IGBT inverters and motor controllers—from thermal damage during a fault. It offers a high breaking capacity of 50kA, ensuring reliable arc quenching even in high-energy DC circuits.

Primary Applications

• Heavy EV Main Protection: Ideal for the main power bus in electric buses, trucks, and large-scale industrial electric vehicles.
• Power Distribution Units (PDU): Protection for high-current distribution manifolds within high-voltage drivetrains.
• Grid-Scale Energy Storage: Safeguarding large battery racks and multi-megawatt Power Conversion Systems (PCS).
• High-Speed DC Charging: Infrastructure-side protection for ultra-fast charging stations.

Standards and Compliance

• Technical Compliance: Adheres to IEC 60269-4, ISO 8820, GB/T 31465, and GB 13539.4.
• Environmental Reliability: Fully RoHS compliant.
• Safety Certification: CE marked for global distribution.