- ADDRESS：Jinan City, Shandong Province
- Wanda Plaza, Jinan, Shandong, China
- +8617615809553
- info@deruna.com
The interruptor (switch) is a fundamental electrical component that controls various circuits in the vehicle, from lighting to auxiliary systems, ensuring reliable operation and driver convenience. For SINOTRUK HOWO heavy-duty trucks, the OEM number 812W25503-6037 identifies a premium-quality interruptor engineered to deliver consistent switching performance, durability, and precise fitment under the most demanding operating conditions. As a trusted supplier of Sinotruk howo parts, Deruna offers this genuine interruptor, manufactured to the strictest OEM specifications.
The 812W25503-6037 interruptor features a robust housing, precision-machined contacts, and a positive-action mechanism that provides clear tactile feedback and reliable circuit closure. Its advanced design minimizes contact resistance, reduces arcing, and ensures long service life even under frequent use. Whether you are replacing a faulty switch or upgrading your vehicle’s controls, this component delivers the performance and reliability that SINOTRUK HOWO trucks demand.
OEM direct replacement – no modifications needed | Engineered for SINOTRUK HOWO electrical systems
Interruptor
Выключатель
Interruptor
Interruptor
Выключатель
Interruptor
Interruptor
Выключатель
Interruptor
The 812W25503-6037 interruptor is a precision-engineered switching device designed specifically for SINOTRUK HOWO heavy-duty trucks. It provides reliable on/off control for a variety of electrical circuits, including lighting, auxiliary power, and control systems. This interruptor is manufactured to exacting OEM tolerances, ensuring a perfect fit and reliable performance in all operating conditions.
The interruptor features a durable thermoplastic housing that resists impact, heat, and chemical exposure. The internal contacts are made from high-conductivity copper alloys and silver-plated to minimize resistance and prevent corrosion. The actuation mechanism is designed for positive, tactile feedback, giving the operator clear confirmation of circuit status. The terminal design ensures secure wire connections and easy integration into the vehicle’s wiring harness.
Investing in the genuine 812W25503-6037 interruptor ensures that your truck maintains reliable electrical control, reduces the risk of circuit failure, and enhances overall vehicle safety and convenience. It is the preferred choice for fleet operators and workshops that demand uncompromised quality and reliability from their electrical components.
| OEM Number | 812W25503-6037 |
| Part Name | Interruptor (Switch) |
| Brand | SINOTRUK HOWO |
| Component Category | Chassis / Electrical Control |
| Housing Material | Thermoplastic (UL94 V-0 rated) |
| Contact Material | Copper alloy, silver-plated |
| Weight (approx.) | 0.08 kg (0.18 lbs) |
| Voltage Rating | 24V DC (nominal) |
| Current Rating | 20 A (resistive) |
| Contact Resistance (max) | ≤ 10 mΩ |
| Mechanical Life | ≥ 1,000,000 cycles |
| Operating Temperature Range | -40°C to +85°C |
| Terminal Type | Male blade (6.3 mm x 0.8 mm) |
| Application | SINOTRUK HOWO A7, T7, 6×4, 8×4, and most heavy-duty models |
All values are based on OEM engineering specifications for the 812W25503-6037 interruptor. Minor deviations may occur due to manufacturing tolerances.
The 812W25503-6037 provides clear, positive feedback upon switching, ensuring the operator knows the circuit status with certainty.
The high-conductivity contacts are silver-plated to minimize resistance, reduce heat generation, and ensure reliable current flow over millions of cycles.
The impact-resistant thermoplastic housing protects internal components from moisture, dust, and vibration, ensuring long-term reliability.
Rated for 20 A at 24V DC, this interruptor can handle heavy loads such as lighting, motors, and auxiliary systems with ease.
The housing is made from UL94 V-0 rated thermoplastic, providing excellent resistance to ignition and flame spread.
With its robust design and high-quality materials, this interruptor delivers long-lasting performance, reducing the need for frequent replacements.
The interruptor is a critical electrical component that directly affects circuit reliability, safety, and driver convenience. Using a counterfeit or substandard switch can lead to high resistance, arcing, overheating, and even electrical fires. The genuine 812W25503-6037 interruptor eliminates these risks through OEM-grade materials, precision manufacturing, and rigorous quality testing.
Key benefits of choosing the authentic 812W25503-6037:
Deruna sources the 812W25503-6037 interruptor directly from authorized manufacturers, subjecting each unit to a thorough quality inspection. We package each component securely to prevent damage during shipping, so it arrives ready for installation.
Proper installation and regular maintenance are essential to maximize the service life and performance of the 812W25503-6037 interruptor. Follow these best practices:
Before installing the 812W25503-6037, always disconnect the vehicle’s battery to prevent accidental short circuits or electrical shock.
Ensure that the wiring harness terminals are clean and properly crimped. Insert them fully into the switch terminals until they click securely.
Install the interruptor into the designated panel or bracket, ensuring it is fully seated and retained by the locking mechanism or mounting screws.
Regularly check the 812W25503-6037 for signs of wear, corrosion, or loose connections. Clean the terminals if necessary and tighten any loose connections.
Always refer to the SINOTRUK HOWO service manual for detailed electrical system procedures, wiring diagrams, and inspection intervals. Regular maintenance of the 812W25503-6037 interruptor ensures reliable electrical control and prevents unexpected failures.
The 812W25503-6037 interruptor is compatible with a wide range of SINOTRUK HOWO heavy-duty trucks and commercial vehicles, including:
For models not listed, cross-reference your original switch part number with 812W25503-6037. This interruptor is designed to fit SINOTRUK HOWO electrical systems with standard mounting and terminal configurations. Please consult your vehicle’s service manual or a qualified technician to confirm compatibility.
The 812W25503-6037 interruptor is a vital component of the SINOTRUK HOWO electrical system, providing dependable switching for essential circuits and enhancing driver convenience and safety. Its robust construction, silver-plated contacts, and positive actuation ensure that your truck delivers consistent electrical control, time after time.
By choosing the genuine 812W25503-6037 part, you protect your vehicle from the dangers of inferior aftermarket alternatives – poor contact, overheating, and potential circuit failure. Instead, you invest in a component rigorously tested and validated by SINOTRUK HOWO, giving you peace of mind on every journey. Its superior materials, precision engineering, and flame-retardant housing contribute to lower maintenance costs, reduced downtime, and enhanced safety.
As a dedicated supplier of Sinotruk howo parts, Deruna is committed to delivering the 812W25503-6037 interruptor with the highest level of quality assurance. Every unit is inspected to meet OEM specifications, ensuring that you receive a product you can trust.
Equip your SINOTRUK HOWO with the genuine 812W25503-6037 interruptor – engineered for strength, precision, and uncompromising electrical control.
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
