When 700V DC Meets 32A Protection
In the charging control cabinet of a Shenzhen-based EV manufacturer, 368 EV322-3FM fuses quietly completed 18 months of stress testing. This 32A DC700V fuse from Zhongrong reduced circuit failure rates by 41% compared to previous solutions, becoming the invisible hero behind 50,000+ electric vehicles.
Core Scenarios Defining Performance
1. EV Fast Charging Stations: Withstands 500+ instantaneous current impacts during 120kW DC charging
2. Solar Storage Systems: Maintains stable operation through 2000+ daily on/off cycles in 1500V PV arrays
3. Industrial Robotics: Protected 24/7 operation of 460V DC servo systems in 3 automotive factories
Technical Highlights Decoded
- Arc-extinguishing capability <3ms (CNAS Lab Test Data)
- Operating temperature range: -55°C to +125°C
- 1000+ short-circuit protections without performance degradation
“The breaking capacity reaches 20kA at 700VDC – this parameter convinced our engineering team,” said Li Wei, Chief Engineer at a top-tier battery pack supplier.
Cost Performance Redefined
While unit price is 15-20% higher than conventional fuses, lifecycle calculations show:
• Maintenance costs reduced by 38%
• System downtime decreased by 63%
• Mean time between failures (MTBF) increased to 85,000 hours
From Beijing’s 2025 Smart Grid demonstration project to Shanghai’s new energy vehicle industrial clusters, the EV322-3FM continues to write new chapters in circuit protection history.
