When 80V DC Meets 25KA Surge Protection
In the EV battery pack of NIO ES8, engineers discovered a critical challenge: traditional fuses couldn’t handle instantaneous currents exceeding 20KA during short circuits. The RT302-00-DC80V/25KA GS 125A from Zhongrong became the game-changer, with its unique silver-plated contact structure reducing arc duration by 40% compared to standard models.
Real-World Validation
- Withstood 1,500+ charge/discharge cycles in BYD’s blade battery tests
- 0.1ms ultra-fast response in CATL’s 800V platform validation
- Operates stably at -40°C to 125°C in JAC’s polar region vehicle trials
Technical Breakthroughs Behind the Safety
The ceramic tube filled with quartz sand achieves 98.7% arc extinguishing efficiency. Its patented ‘dual trigger mechanism’ combines thermal response and electromagnetic tripping, verified by TÜV Rheinland to meet both UL 248-15 and IEC 60269-4 standards.
“In our energy storage systems, RT302 reduced unexpected downtime by 67%” – Huawei Digital Power Engineer
Cross-Industry Applications
| Field | Application | Performance |
|---|---|---|
| EV Charging | DC Fast Chargers | 30% longer service life |
| Solar Energy | PV Combiner Boxes | Withstands 15kA/1s 10 times |
| Industrial | Robotic Arms | IP67 protection rating |
