SINOFUSE RS309-MD-EVS High-Speed Fuse, 150A 500VDC, EV/HEV Power Semiconductor Protection - Pack of 3

The SINOFUSE RS309-MD-EVS 150A is a high-performance, high-speed bolted-blade fuse specifically engineered for the protection of electric vehicle (EV) and hybrid electric vehicle (HEV) systems. Manufactured by Xi'an Sinofuse Electric Co., Ltd., this fuse is designed to deliver rapid interruption of fault currents, providing essential protection for power semiconductor devices and DC power circuits.

Construction and Design Built with a high-strength ceramic body and high-conductivity silver-based fuse elements, the RS309-MD-EVS series ensures excellent thermal stability and reliable performance. The "3XA" size provides a compact form factor, making it ideal for integration into space-constrained Power Distribution Units (PDUs) and Battery Management Systems (BMS). The bolted-blade connection (M8) ensures high mechanical integrity and low resistance under constant vibration and thermal cycling.

Performance Characteristics Defined by its high breaking capacity and low let-through energy, this fuse effectively limits energy during short-circuit events to prevent damage to sensitive downstream components. It is rated for 150A at 500VDC and features an optimized power dissipation of 27W, balancing energy efficiency with robust protection.

Target Applications

• Electric Vehicles (EV/HEV): Ideal for on-board chargers (OBC), DC/DC converters, and auxiliary high-voltage circuits.
• Charging Infrastructure: Protection for DC charging piles and power stations.
• Power Electronics: Used in UPS systems, variable frequency drives (VFDs), and high-voltage DC motor controllers.
• Energy Storage: Safety isolation for battery modules and energy storage systems (ESS).

Safety and Compliance

• Compliant Standards: IEC 60269, ISO 8820, GB/T 31465, and GB 13539.
• Environmental Standards: RoHS compliant.
• Certification: CE Marked.