12 Volt 120 Amp Alternator
2、Compatibility: Fits Bosch OEM numbers 0120484028, 0120484053, 0986AN0538, 1986A00014, F005A00020, 12334N, 10412571, 1E32217G01, 1E78291G00, 1E78291G02, 20415456, 412571, 415456, 415456B, 452591, 452675, 452775, 452947, 5D50461G01.
3、Performance: 12V 120A alternator for stable charging and reliable power supply.
4、Reliability: Durable design ensures long-lasting performance comparable to original equipment.
5、Quality: Made by XITU with 100% brand-new, high-quality components.
- Product Description
12 Volt 120 Amp Alternator - Professional Automotive Charging Solution
Wuxi Xitu Industry and Trade Co., Ltd.'s 12 Volt 120 Amp Alternator provides enterprise-grade power for your car. Our 20,000 m² IATF 16949-certified plant produces this alternator, which offers steady 12V charging with a 120A output capability.
Our device fits Bosch OEM numbers 0120484028, 0120484053, 0986AN0538, and others and is designed for Thermo King SB-III SR and Super II series cars. With 20 years of manufacturing experience and over 500,000 units produced annually, we test every alternator full-load. Even with heat loads over 125°C, precise copper windings and heavy-duty diode rectifiers maintain voltage control between 13.8V and 14.4V.
What Is a 12 Volt 120 Amp Alternator?
Our products convert engine power into direct current electricity for your car's electrical system. Modern automobiles with high-draw electronics benefit from the 120 Amp peak current capacity at optimum engine RPMs.
This part fixes everyday power issues. Standard alternators commonly fail with refrigeration, power liftgates, and auxiliary lights. Our high-output device supports demanding aftermarket accessories and reduces battery waste during low-RPM idling.
The alternator powers your electrical system and charges your batteries. Our design manages high-current supply in stop-and-go settings, unlike lower-amperage stock units that break under thermal strain.
Technical Specifications
| Parameter | Description |
|---|---|
| Voltage | 12V (Regulates 13.8V-14.4V) |
| Output Current | 120 Amps |
| Power Type | AC alternator, brushed/brushless options |
| Housing Material | Aluminum alloy |
| Winding Material | High-density copper |
| Weight | 5.5kg - 7kg |
| Mounting Options | Horizontal & vertical, standard bracket |
| Protection Rating | Fully sealed, dust & water resistant |
| Compatibility | Cars, trucks, buses, construction vehicles |
| OEM Compatibility | Bosch 0120484028, 0120484053, 0986AN0538, 1986A00014, F005A00020, 12334N, 10412571, 1E32217G01, 1E78291G00, 1E78291G02, 20415456, 412571, 415456, 415456B, 452591, 452675, 452775, 452947, 5D50461G01 |
| Operating Temperature | -40°C to 125°C |
| Certification | IATF 16949, ISO 9000 |
| Warranty | 6 months |
Diverse Application Scenarios
Your 12 Volt 120 Amp Alternator excels across multiple demanding environments where standard units fail.
Delivery vehicles with power liftgates and refrigerators need continual high-current delivery. In urban stop-and-go traffic with fluctuating engine speeds, our alternator supplies power. Our units function reliably across thousands of daily cycles for fleet management.
Marine Environments: Salt-spray corrosion attacks yacht and commercial fishing vessel inboard engines. While charging deep-cycle home batteries at high power, our sealed aluminum container avoids environmental harm. The unit's ASTM B117 corrosion resistance ensures coastal durability.
4x4 off-roading and overlanding require reliable power for dual-battery systems, electric winches, and portable freezers. Our alternator outputs reliably despite intense vibration, dust, and high-incline operation. Overlanders use this device for off-grid camping.
Superior Quality Control Process
Every alternator leaving our facility passes a comprehensive five-stage inspection protocol that ensures your investment delivers long-term value.
Full-Load Performance Testing: We bench-test each unit to verify it achieves 120 Amps at 6,000 alternator RPM. This guarantees you receive the rated output capacity, not inflated marketing numbers.
Thermal Cycling Evaluation: Maximum load testing validates heat dissipation capacity. Our internal fan configuration prevents diode burnout even during extended high-output operation in engine bays exceeding 125°C.
Voltage Ripple Analysis: We measure DC output to ensure minimal AC leakage, typically under 0.5V. This protects your sensitive ECUs and prevents premature failure of electronic components.
Component Durability Inspection: High-grade NSK or SKF bearings provide low-noise operation and extended service life. Precision-balanced rotors minimize magnetic resonance and eliminate the common "whining" sound under load.
Environmental Stress Testing: Salt spray and vibration testing per ISO 16750 standards validate housing integrity and internal electronics. Your alternator will withstand real-world environmental stressors throughout its service life.
Why Choose XITU Manufacturing?
Our manufacturing advantages translate directly into product reliability you can measure.
OEM Quality Manufacturing: We follow OEM specs. Your alternator performs like factory parts and fits your car. With 20+ years of expertise, we know engineering tolerances important.
Comprehensive guarantee: Every product has a 6-month guarantee on non-human-induced quality faults. We provide free expert repair or replacement. This shows our production quality assurance.
In-House R&D: Our experts optimize product structure and performance. We increase stability and durability through iterative design. Custom solutions are available for special needs.
Professional OEM serve Experience: We serve numerous worldwide automakers that require quality. This record shows our global competitiveness and industrial dependability.
Customer Support: Our technical staff provides timely assistance and after-sales support. You get help with installation and performance improvement during ownership.
FAQ
Q: Does the product have full power when idle?
A: Most devices deliver 50-60% of rated capacity at idle. Most 120A output needs engine speeds exceeding 2,500 RPM. Upgrade the pulley ratio or talk to our techs about unique solutions for better idle output.
Q: Does this 120A model replace 60A or 90A?
A: Yes, if mounting brackets match your setup. You must improve the "Big 3" electrical connections to accommodate more current. Replace alternator-to-battery, battery-to-ground, and engine-to-ground cables with stronger wire to reduce voltage loss and overheating.
Q: Why does the alternator whine under load?
A: Whining is usually caused by magnetic resonance or diode bridge failure. Our excellent diode rectifiers and precision-balanced rotors reduce this difficulty. Whining frequently signals worn bearings or electrical issues that need attention.
Q: Does this unit work with LiFePO4 batteries?
A: Our normal regulator charges lead-acid or AGM. Install a DC-to-DC charger or get our internal regulator for lithium battery systems. It avoids overheating and guarantees Lithium chemistry charging voltage.
Q: Can I check the 120A rating?
A: Professional systems have serialized Dyno Test Reports with RPM performance curves. This document verifies factory-tested output for your device. Request this report for order verification.
Contact Us
Ready to Upgrade Your Charging System with 12 Volt 120 Amp Alternator?
Email: arisa@xitu-auto.com.
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