New Energy Power truck parts Electrical protection box assembly 3791010-TZ3A0

Built as the first line of defense for NEV electrical systems, this protection box integrates comprehensive safety safeguards. The outer shell is made of flame-retardant ABS+PC alloy (UL94 V-0 rating), resisting ignition and preventing fire spread. The IP68 waterproof/dustproof rating (tested to 1m water immersion for 30 minutes) shields internal terminals from rain, snow, and road dust. Inside, a modular fuse panel (20A-100A fuses) and circuit breakers provide over-current and short-circuit protection, automatically cutting off power when current exceeds 120% of the rated value. High-voltage terminals feature insulation resistance ≥100MΩ (500V DC) and creepage distance ≥12mm, eliminating electric shock risks. A pressure relief valve releases internal gas during faults, avoiding explosion hazards

Engineered with a user-centric internal design, the box optimizes heat management and maintenance efficiency. High-voltage terminals (power circuits) and low-voltage connectors (signal circuits) are separated by a 50mm insulating baffle, preventing electromagnetic interference (EMI) and ensuring signal integrity. The bottom features a honeycomb heat dissipation structure with 12 ventilation holes, paired with a built-in aluminum heat sink, reducing internal temperature by 15℃ compared to sealed boxes—critical for components operating at 400V DC. Removable terminal blocks (plug-in design) allow quick replacement of faulty terminals without disassembling the entire box. Clear labeling (“HV-BAT-IN”, “VCU-SIG-OUT”) and color-coding (red for high-voltage, blue for signal) simplify wiring and troubleshooting

Designed for the rigorous demands of commercial NEVs, the box exhibits exceptional durability across diverse climates and road conditions. The ABS+PC shell withstands extreme temperatures from -40℃ (northeast China winters) to 85℃ (desert regions), maintaining structural integrity through 500 thermal cycles (-30℃ to 100℃) without cracking. It passes 500,000 vibration cycles (5-2000Hz, ISO 16750-3) with no loose terminals, adapting to off-road and construction site use. The outer surface’s anti-UV coating resists fading and aging after 2000-hour QUV testing, while the stainless steel hinges and latches (304-grade) resist corrosion—passing 1000-hour salt spray testing (ASTM B117) with no rust. This robustness ensures a service life of ≥8 years/400,000km

Optimized for efficient fleet maintenance, the box features a tool-free design that reduces installation and service time. The front cover uses a quick-release latch—opening in 5 seconds for emergency access, eliminating the need for screwdrivers. Pre-assembled wiring harnesses (with 100mm service loops) simplify connection to external components, cutting installation time by 40% compared to bulk terminals. The 4-point mounting bracket uses M12×30 high-strength bolts (grade 10.9) that match the chassis’s original holes, requiring only a torque wrench (45-50N·m) for fixation. A transparent inspection window on the cover allows visual checks of terminal status without opening the box, while the built-in diagnostic port (CAN bus) connects to a handheld scanner for quick fault detection—reducing troubleshooting time by 60%