Dongfeng Yuchai engine alternator M59L1-3701100A for sale

Designed to meet the high-power demands of modern heavy-duty vehicles, the M59L1-3701100A alternator delivers a rated output of 150A at 28V DC—providing sufficient power to charge the vehicle’s battery (typically 24V/150Ah) while supplying electricity to critical electrical components (e.g., air conditioning, ABS systems, LED lights, and engine ECUs). It features a high-efficiency copper-wound stator and rotor (copper content ≥99.5%), which reduces energy loss and achieves a maximum efficiency of ≥85% (at 75% load). The alternator’s voltage regulator (integrated solid-state design) maintains stable output voltage (27.5V-29.5V) even under fluctuating engine speeds (1500-8000 RPM), preventing overcharging or undercharging of the battery and extending battery service life

The alternator’s housing is constructed from high-strength aluminum alloy (ADC12) with die-casting technology, offering excellent heat dissipation and corrosion resistance. The front and rear bearings (double-row deep groove ball bearings) are sealed with nitrile rubber (NBR) shields, preventing contamination from dust, oil, and water while reducing friction and noise (≤65 dB at rated speed). The rotor shaft is made of high-carbon steel (40Cr) with quenching and tempering treatment (surface hardness HRC 50-55), ensuring resistance to bending and wear even under long-term high-speed operation. Additionally, the alternator’s internal wiring uses high-temperature silicone insulation ( up to 200°C), protecting against heat damage in the engine compartment. These design features ensure a service life of over 300,000 kilometers under normal operating conditions

Engineered to withstand the harsh conditions of heavy-duty vehicle operations (e.g., construction sites, dusty highways, and rainy climates), the M59L1-3701100A alternator meets the IP6K5 protection standard. The housing’s seam is sealed with a silicone rubber gasket, and the electrical connector is equipped with a waterproof O-ring (fluororubber FKM), preventing dust ingress (IP6X) and low-pressure water jets (IPX5) from damaging internal components. The alternator also operates reliably within a wide temperature range of -40°C to +105°C, avoiding performance degradation in extreme cold (e.g., northern China winters) or high heat (e.g., southern China summers). This level of protection ensures consistent performance in diverse environmental conditions, reducing the risk of unexpected alternator failure

The M59L1-3701100A alternator fully complies with strict national and international standards for automotive electrical components, including China’s GB/T 13349-2008 (Automotive Alternators) and the European IEC 60034 standard for rotating electrical machines. It undergoes rigorous testing before leaving the factory, including: a 100-hour continuous load test (at rated output), a vibration test (50Hz-2000Hz, 30G acceleration) to simulate road conditions, a salt spray test (500 hours) to verify corrosion resistance, and a thermal shock test (-40°C to +105°C, 100 cycles) to ensure temperature stability. Additionally, the alternator is RoHS-compliant (free of lead, mercury, and other hazardous substances) and meets REACH regulations, ensuring environmental safety during production and disposal. This compliance guarantees the alternator’s reliability and compatibility with Dongfeng Yuchai engines