- ADDRESS：Jinan City, Shandong Province
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com
The WG9725580021 Diode Assembly (3A) is a premium, heavy-duty chassis electrical protection component engineered specifically for SINOTRUK Howo trucks, delivering reliable one-way current flow and circuit isolation for sensitive electrical systems. As a trusted supplier of genuine Sinotruk howo parts, we offer this OEM-grade diode assembly as a direct replacement for the original factory unit. The WG9725580021 assembly ensures correct polarity protection, stable electrical performance and dependable operation on Howo A7, T7H, HOWO 371 and HOWO 380 models.
Manufactured from high-purity silicon semiconductor material, a heat-resistant epoxy body and corrosion-resistant metal terminals, the Diode Assembly (3A) is built to exact OEM dimensions. Its robust construction maintains correct forward voltage drop, resists vibration, dust, moisture and temperature extremes, and provides dependable performance under the constant electrical loads of commercial truck operation.
OEM WG9725580021 • 3A current rating • Silicon semiconductor • Vibration resistant • Direct OEM fit
The WG9725580021 Diode Assembly (3A) is a critical electrical protection component in the chassis system of SINOTRUK Howo trucks. It allows current to flow in one direction only, preventing reverse current, voltage spikes and circuit feedback that can damage sensitive electronic modules, relays and control units.
This WG9725580021 assembly is precision-manufactured to exact OEM dimensions. The silicon diode element is rated for 3A continuous current, the epoxy body withstands high temperatures, and the metal terminals are plated for corrosion resistance. The mounting holes match the factory bracket pattern exactly.
Common signs that a diode assembly needs replacement include electrical faults in protected circuits, blown fuses, erratic operation of electronic modules, visible damage or discoloration of the diode body, and corroded or loose terminals. Fitting a new assembly restores reliable circuit protection and electrical system integrity.
Whether you are repairing a damaged protection circuit, replacing a faulty diode or carrying out preventive maintenance on a fleet of Howo trucks, the WG9725580021 Diode Assembly (3A) delivers the quality, reliability and durability that SINOTRUK Howo professionals expect.
The WG9725580021 Diode Assembly (3A) is designed for SINOTRUK Howo trucks, with primary compatibility across the A7, T7H, HOWO 371 and HOWO 380 series. It is a direct OE replacement, so it bolts into the original fuse or relay block and connects to the factory wiring harness without modification.
This diode assembly is essential in applications where reliable electrical protection is critical, such as long-haul transport, construction, mining and municipal service. In these duties, the diode must maintain correct one-way conduction and resist vibration, heat, oil and moisture.
When replacing the diode assembly, it is recommended to inspect the protected circuit, fuse box, relay block and main wiring harness for wear or damage. The WG9725580021 is designed to work with the factory electrical system, ensuring correct protection and reliable operation.
For fleets with multiple HOWO trucks, standardising on the WG9725580021 Diode Assembly (3A) simplifies electrical repair inventory and ensures the correct component is available for scheduled maintenance or emergency repairs.
Replacing the WG9725580021 Diode Assembly (3A) is a simple procedure that requires basic electrical knowledge and hand tools. This work should be performed by a qualified technician. Begin by disconnecting the battery negative terminal to prevent accidental short circuits.
Locate the diode assembly in the fuse or relay block. Disconnect the terminals from the old diode, taking note of the orientation and polarity markings. Remove the mounting screw or release the retaining clip and withdraw the old diode. Inspect the terminals for corrosion or damage.
Fit the new WG9725580021 diode into the holder, ensuring correct polarity orientation. Reconnect the terminals and tighten them to the correct torque. Reconnect the battery and test the affected circuit. Confirm that power flows correctly and no fuses blow under normal load.
For ongoing maintenance, periodically check the diode for discoloration or looseness, and ensure the terminals are clean and tight. If the circuit fails repeatedly, inspect for short circuits or reverse polarity before replacing the diode again.
The WG9725580021 Diode Assembly (3A) is manufactured in an ISO 9001-certified facility using high-purity silicon semiconductor material and precision assembly processes. Raw materials are sourced from certified suppliers and undergo incoming inspection for forward voltage, reverse breakdown voltage and current rating.
Each diode is assembled on precision lines and then tested for forward conduction, reverse blocking, thermal stability and terminal retention. The epoxy body is inspected for cracks, and the terminals are checked for correct plating and fit. Every unit is subjected to a functional electrical test before packing.
Random samples from each production batch undergo environmental testing, including thermal cycling, humidity exposure, vibration and salt spray, to validate long-term reliability in heavy-duty truck applications. These tests ensure the diode continues to perform in the harsh conditions experienced by SINOTRUK Howo vehicles.
We back the WG9725580021 with a comprehensive 12-month warranty against material and workmanship defects. Our rigorous quality control ensures that every diode assembly delivers the same fit, function and durability as the original factory component.
The WG9725580021 Diode Assembly (3A) is a vital component for maintaining reliable electrical protection, circuit integrity and vehicle safety on your Howo truck. A faulty diode causes reverse current damage, blown fuses and potential failure of sensitive electronic modules, especially under electrical load.
Manufactured from high-purity silicon and a heat-resistant epoxy body, the WG9725580021 offers outstanding reliability, current stability and long-term durability. Its direct-fit design ensures straightforward installation and immediate compatibility with the factory electrical system.
Fleet operators benefit from reduced electrical downtime, lower maintenance costs and improved vehicle availability. Owner-operators gain peace of mind knowing their protected circuits are safeguarded by a diode that meets strict OEM standards and is backed by a comprehensive warranty.
Order the WG9725580021 Diode Assembly (3A) today and keep your SINOTRUK Howo electrical system protected for years to come.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
A PROFESSIONAL CHINA TRUCK AND SPARE PARTS SUPPLIER
@Copyright DERUNA
