Dongfeng GX Right SMJ Box 3724420-C6300 in stocked

The SMJ Box enclosure is made of high-strength ABS+PC composite material (impact resistance ≥15 kJ/m²) with a reinforced rib structure, resisting deformation or cracking from road vibration (frequency: 10-500Hz) or minor collisions. The enclosure surface is treated with anti-UV coating, preventing fading or brittleness under long-term sunlight exposure (-40°C to 85°C operating temperature range). It achieves IP67 waterproof and dustproof rating: the lid and base are sealed with a nitrile rubber gasket (compression rate: 30-40%), and cable entry ports use rubber grommets—blocking rainwater, dust, and road salt from entering the internal circuit, ensuring reliability in harsh environments

The box interior features a pre-installed terminal block (12-16 positions, rated current: 10-20A per terminal) and fuse holder (2-4 positions, compatible with 5-15A blade fuses), designed to centralize SMJ (Signal/Control) circuit connections. Terminals are made of tinned copper (plating thickness ≥5μm) for low contact resistance (≤30mΩ) and anti-corrosion performance. Internal wires are fixed with nylon cable ties and labeled with function marks (e.g., "Signal Input," "Power Output") per Dongfeng GX’s electrical standards, ensuring organized routing and easy maintenance. A detachable lid (secured by 4 Phillips screws) allows quick access to internal components for inspection or repair

The box is equipped with 0.8-1.2mm thick EPDM rubber pads at the mounting points, which absorb vibration from the vehicle frame and engine—reducing resonance with internal components and preventing terminal loosening. For signal stability, the box integrates a metal shielding layer (tinned copper mesh, coverage rate ≥90%) around the internal signal circuit area, reducing electromagnetic interference (EMI) from nearby high-current components (e.g., alternators, motors). This design ensures signal transmission accuracy: voltage fluctuation is controlled below ±0.2V, and signal delay is ≤3ms, critical for SMJ system’s control performance

The SMJ Box adopts a bolt-fixed design: it is secured to the vehicle’s mounting bracket with 4 M6 stainless steel bolts (matching original thread specifications), with washers to prevent loosening from vibration. The mounting holes are precisely positioned (error ≤0.3mm) for quick alignment, and no specialized tools are required—installation can be completed in 15-20 minutes with a standard wrench. Additionally, the box is marked with a "TOP" direction label and factory-installed positioning pins, avoiding reverse installation. The bolts feature anti-loosening thread locker (strength grade: medium), ensuring long-term stability even under frequent road shocks