Specification | Details |
Voltage | 12V |
Amperage Output | 240A - 275A (cold/hot rated; e.g., 270A typical for Leece-Neville models) |
Mount Type | J180 Long Hinge (Pad mount variant for select cross-references) |
Rotation | Clockwise |
Regulator | Internal (with remote sense capability) |
Fan Type | External |
Output Terminal | 5/16" B+ (positive) |
Polarity | Negative ground (isolated ground options on some models) |
Design Type | Brushless (Delco 40SI series) or Brush-Type (Leece-Neville 4000/4800/4900 series) |
Weight | Approximately 25-30 lbs (varies by model) |
Operating Temperature | -40°C to 105°C |
RPM Range | Idle output at 200A+; continuous high RPM tolerance |
Applications | Heavy-duty trucks, buses, emergency vehicles, marine, and off-highway equipment |
Key Features of the WB2448 OEM 8600390 40SI Heavy Duty Alternator
High Output Performance:
Provides 240A to 275A at 12V, powering high electrical loads such as air conditioning, lighting, electronics, and auxiliary systems in heavy-duty vehicles.
Brushless or Brush-Type Design:
Choose from Delco Remy 40SI series (brushless for extended life, reduced maintenance) or Leece-Neville models (brush-type for rugged reliability), all backed by Elecdurauto quality assurance.
Mounting Style:
J180 Long Hinge mount for straightforward installation (Pad mount variant available for select cross-references like 4949PGH).
Efficiency and Durability:
Features an internal regulator, external fan, clockwise rotation, and high-efficiency design to minimize fuel consumption and horsepower draw. Rated for high RPM (up to 10,000-12,000 continuous) and extreme temperatures (up to 105°C ambient).
Advanced Features:
Equipped with remote voltage sensing for stable charging, EMI suppression for reduced interference, and lightweight construction for improved vehicle efficiency.
Warranty and Quality:
Elecdurauto offers an 18-month warranty on new units; remanufactured options available for cost-conscious buyers. Built for vibration resistance and long service life.
OEM 8600390 WB2448 Alternator Replacement Applications
Elecdurauto's heavy-duty alternator is designed for a wide range of vehicles and engines, making it an essential addition to your B2B inventory:
Truck Brands: Freightliner, International, Kenworth, Mack, Peterbilt, Sterling, Volvo
Bus and Coach: Blue Bird, IC Bus, Thomas Built
Engines: Caterpillar, Cummins, Detroit Diesel, International MaxxForce
Other Uses: Emergency vehicles (fire trucks, ambulances), marine applications, off-road equipment, and high-demand electrical systems
WB2448 40SI Alternator Cross Reference & OEM Comparison
| Brand / Manufacturer | Reference Number | Specification / Notes |
| Wilson | WB2448 | Remanufactured equivalent |
| Lester | 8757 | Universal cross-reference standard |
| Delco Remy | 8600390 | 240A output |
| 8600280 | 275A output |
| 8600526 | 275A – From premium 40SI brushless series |
| Leece-Neville / Prestolite | 4856AA | 270A, 4800 series |
| 4867JB | 270A, 4000 series |
| 4867JGH | 270A, isolated ground variant |
| 4870AA | 270A, 4800 series |
| 4870JB | 270A, 4000 series |
| 4871JB | 270A, ignition excite |
| 4872AA | 270A, 4800 series |
| 4872JB | 270A, 4000 series |
| 4949PGH | 270A, 4900 series – Pad mount |
Quality Standards & Testing for OEM 8600390 WB2448 Heavy Duty Alternator
Each alternator is manufactured to IATF 16949 standards and undergoes:
Dynamic performance testing at full load (24V/160A)
Vibration and heat endurance validation
Regulator response and over-voltage protection checks
Only products that pass 100% end-of-line testing are released for shipment.
![ISO 9001, ISO 14001, ISO 45001, IATF 16949 certified ignition coil manufacturer for OEM and aftermarket supply]()
Ideal for Heavy-Duty Fleets & Distributors
We support flexible wholesale models to help distributors and importers grow in their market:
Designed for fleet operators, OEM service networks, and aftermarket distributors
Longer lifecycle means fewer replacements and lower downtime
Consistent charging reduces ECU fault codes and battery replacement frequency
Supported by OEM-grade technical documentation and warranty
Why Choose Elecdurauto Heavy-Duty Alternators
At Elecdurauto, I focus on providing heavy-duty alternators that combine OEM-grade performance with business-driven advantages for global distributors, fleets, and aftermarket brands. Each alternator is designed for power, reliability, and profitability.
Factory-Level Engineering
Produced under the same standards as leading OE brands like Delco Remy, Bosch, and Valeo, ensuring precise fitment, high efficiency, and long service life.
100% Quality Testing
Every alternator undergoes vibration, durability, and full-load testing to guarantee stable output under the harshest operating conditions.
Broad Product Range
Comprehensive coverage across 12V and 24V alternators (100A–275A) for trucks, buses, construction, and marine applications.
Reliable Supply for B2B Buyers
Flexible capacity and bulk inventory support ensure stable availability for distributors, fleet operators, and OEM customers.
Exclusive Product Advantage
Some alternator models are market-exclusive, helping partners capture early opportunities in high-demand segments.
Fast Response
All inquiries receive a reply within 24 hours, keeping your sourcing process quick and efficient.
Custom Development
Support for rapid mold opening and new product design, ideal for customized alternator applications.
Competitive Pricing
Benefit from low-cost new releases and the most competitive prices on stocked models, helping your business maximize margins.
Expert After-Sales Support
Receive professional technical guidance and installation support from experienced alternator engineers.
