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E: 15829336298@139.com
Room 1212-G107, Unit 2, Building 1, Block A, Shenglong Plaza, No. 80 Weiyang Road, Weiyang District, Xi'an City, Shaanxi Province
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QG9100760100
Sinotruk HOWO
| Attribute | Description |
|---|---|
| Part Name | Main Power Switch / Battery Master Switch / Central Circuit Breaker |
| Common Names | Battery Isolator Switch, Main Pole Switch, Vehicle Master Disconnect |
| OE Number (Original Equipment) | QG9100760100 |
| Manufacturer | Sinotruk (China National Heavy Duty Truck Group Co., Ltd.) |
| Function | Electrically isolates the vehicle battery from the entire electrical system when turned off, enhancing safety and preventing parasitic drain |
| Type | Manual rotary or key-operated disconnect switch (typically 2-position: ON/OFF) |
| Mounting Style | Panel-mounted or chassis-mounted with bolt-through terminals |
| Pole Configuration | Single-pole, single-throw (SPST), switching the negative (-) or positive (+) ground path depending on system design |
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| Parameter | Specification |
|---|---|
| System Voltage | 24V DC – Compatible with standard heavy-duty truck electrical systems |
| Rated Current | Up to 500A continuous load (typical); capable of handling high inrush currents during engine cranking |
| Peak Withstand Current | Can endure short-term surge loads (e.g., starter motor draw: 800–1200A) without damage |
| Contact Material | High-purity copper alloy for low resistance and minimal voltage drop |
| Housing Material | High-strength, impact-resistant ABS plastic – flame-retardant and resistant to oil, vibration, and weather exposure |
| Terminal Size | Dual M8 or M10 threaded studs (battery side and chassis/load side) for secure cable connections |
| Protection Rating | Typically IP65 or higher – dust-tight and protected against water jets |
| Operating Temperature Range | -40°C to +85°C (-40°F to +185°F) |
| Weight | Approx. 0.8–1.2 kg |
| Note | Description |
|---|---|
| ✅ Use for Safety & Long-Term Parking | Engage the switch when performing maintenance, storing the vehicle for weeks/months, or in emergency situations to eliminate live circuit risks. |
| Inspect Regularly | During routine service (every 10,000–20,000 km), check: • Terminal tightness • Signs of arcing, discoloration, or melting • Corrosion on contacts or cables |
| Tighten Connections Periodically | Vibration can loosen high-current terminals over time — retorque as needed. |
| ❌ Do Not Use as Ignition Switch | This is not intended for daily ON/OFF cycling during normal operation. Frequent use may accelerate wear. |
| Listen for Abnormal Sounds | A "click" upon turning ON is normal; buzzing, sparking, or sizzling indicates loose connection or internal failure — replace immediately. |
| Prevent Parasitic Drain | Even small leaks (e.g., GPS trackers, ECUs) can drain batteries over time. The master switch eliminates this risk entirely. |
| Fire Prevention Role | In case of collision or electrical fault, cutting power via this switch reduces fire hazard sign |
