This 40SI new alternator is a 12V high-output unit rated from 240A to 275A, engineered for heavy-duty truck and diesel engine applications requiring stable, continuous power delivery. Built with a J180 short hinge mounting, it ensures direct fitment and easy replacement for OEM alternators 8600339, 8600279, 8600299, as well as industry references WB2441 and 8753 / 8754. Designed for commercial fleets, distributors, and service networks, this alternator delivers reliable performance under high electrical load conditions, making it a dependable solution for OEM replacement and bulk supply programs.
8600339 / 8600279 / 8600299
Elecdurauto
China
IATF 16949 / ISO 9001 / CE / RoHS
OEM label and ODM customization accepted
1 pcs
7–15 Days
50,000 pcs / month
18 months
| Quantity: | |
|---|---|
Product Description
This 40SI high-output alternator is engineered to meet the real-world demands of commercial and industrial buyers operating in high-load environments.
Wholesale distributors seeking stable supply, consistent specifications, and predictable inventory planning for 40SI alternator programs.
Fleet maintenance teams requiring OE-level reliability and long service life for trucks, buses, and diesel-powered vehicles, while maintaining cost control across large fleets.
Heavy-duty equipment and vehicle repair workshops supporting applications in mining, construction, public transportation, and off-road machinery where 12V 240A–275A output is critical.
OEM and project-based buyers needing support for J180 short hinge mounting, connector configuration, voltage regulation options, or private labeling and custom build requirements.
Tender and government procurement programs that demand full technical documentation, compliance certifications, and traceable quality standards for heavy-duty electrical components.
OE-Level Replacement Accuracy
Designed as a direct-fit replacement for Delco Remy 40SI alternators, this unit matches original J180 short hinge mounting, electrical interfaces, and performance characteristics, ensuring smooth installation with no modification required.
High Output 12V / 240A–275A Performance
Delivers stable high-current output to support demanding electrical loads such as HVAC systems, engine cooling fans, lighting, onboard electronics, telematics, battery charging systems, and auxiliary equipment in heavy-duty vehicles.
Optimized Cooling for Continuous Duty
Engineered with an efficient air-cooled architecture, the alternator maintains controlled operating temperatures during prolonged operation, high-load cycles, and frequent idling, supporting long service life in commercial environments.
Heavy-Duty Internal Components
Built with high-purity copper windings, an oversized rectifier assembly, sealed heavy-duty bearings, a reinforced aluminum housing, and a dynamically balanced rotor to ensure durability, reduced vibration, and consistent output under harsh operating conditions.
100% End-of-Line Performance Testing
Each alternator undergoes full functional testing, including full-load output verification, voltage regulation accuracy, vibration resistance, thermal stability, and electrical performance validation, ensuring reliable operation before shipment.
| Specification | Details |
|---|---|
| Model | WB2441 |
| Type | 40SI Heavy-Duty Alternator Replacement |
| Voltage | 12V |
| Output | 240A – 275A |
| Cooling System | Air-Cooled |
| Mounting | J180 Short Hinge |
| Regulator | Internal |
| Rotation | Clockwise (viewed from pulley side) |
| Output Terminal | B+ Stud |
| Ground Type | Negative Ground |
| Housing Material | High-strength aluminum alloy |
| Reference Numbers | 8600339 / 8600279 / 8600299 / 8753 / 8754 |
| Application Environment | Heavy-duty trucks, buses, diesel engines, commercial vehicles |
| Duty Cycle | Continuous-duty, high electrical load operation |
| Brand / Reference Type | Part Number |
|---|---|
| Delco Remy | 8600339 |
| Delco Remy | 8600279 |
| Delco Remy | 8600299 |
| Aftermarket Reference | 8753 |
| Aftermarket Reference | 8754 |
| Aftermarket / Program Code | WB2441 |
| OEM / Equivalent Series | 40SI Air-Cooled Alternator Series |
Precision machining for water-cooled housings and end covers to ensure perfect fitment, stable structure, and OE-level heat dissipation.
High-precision balancing ensures smooth rotation, reduced vibration, and reliable performance under high-RPM duty cycles.
Semi-automatic stations with torque control & poka-yoke guarantee fastening accuracy and consistent assembly quality.
Every alternator is tested for output current, voltage regulation, rectifier integrity, and electrical safety before packaging.
Thermal cycling and full-load endurance tests validate heat resistance and long-term durability in heavy-duty applications.
Every alternator undergoes:
100% output performance test
Voltage regulation test
High-temperature resistance test
Vibration and durability test
Rotor/stator electrical integrity testing
Noise & bearing inspection
Full load endurance test
All tests follow IATF 16949 quality-management requirements.
This model is one of the most widely used heavy-duty alternators in commercial fleets. Mechanics and distributors choose this Elecdurauto replacement because:
It is easier to source and more cost-effective than OEM units
Output performance meets or exceeds OE charging specifications
Installation is plug-and-play with matching connectors and mount
It withstands long idling hours, high temperatures, and vibration
Lower total cost of ownership for fleets and service centers
At Elecdurauto, I deliver more than just heavy-duty alternators—I provide full-cycle engineering and supply solutions built around each OEM customer's exact platform requirements. As a trusted global supplier specializing in water-cooled alternators for buses, construction machinery, mining vehicles, and high-load commercial platforms, I work closely with manufacturers to ensure every unit aligns with their electrical, thermal, and durability standards.
Certain alternator models and assemblies are exclusively developed by Elecdurauto and unavailable from other factories.
I ensure fast communication to support your purchasing schedule and project decisions.
I support OEM/ODM development, custom tooling, label customization, and new-model prototyping.
New SKUs are launched at highly competitive prices, and many existing models remain the lowest-cost option worldwide.
18-month warranty
Pre-shipment photos and videos
Serial number tracking
Replacement for QC-approved claims
Support for third-party inspection (SGS, TUV, BV)
Yes. This unit is engineered as a direct-fit replacement for Delco Remy 40SI alternators, matching the original J180 short hinge mounting, electrical connections, and operating characteristics. It replaces OEM part numbers 8600339, 8600279, and 8600299 without requiring installation modifications.
Both versions share the same housing, mounting, and electrical interface. The 275A version provides higher peak current capacity, making it suitable for vehicles with heavier electrical loads such as additional lighting, auxiliary systems, or extended idle operation. Selection depends on the total electrical demand of the vehicle or equipment.
This 12V 40SI high-output alternator is commonly used in heavy-duty trucks, buses, commercial vehicles, and diesel-powered equipment where continuous and stable power supply is required. It is widely specified in fleet, municipal, and industrial service environments.
Yes. This product is designed specifically for fleet operators, distributors, and wholesale buyers requiring consistent specifications, reliable output performance, and long-term supply stability. It is suitable for multi-unit replacement programs and centralized maintenance operations.
Yes. For OEM and project-based buyers, this 40SI alternator can support private labeling, customized packaging, connector configurations, and documentation requirements, subject to order volume and technical confirmation.
Each alternator undergoes 100% end-of-line testing, including full-load output verification, voltage regulation accuracy, thermal stability, and operational consistency checks. This ensures reliable performance under heavy-duty and high-load operating conditions.
Yes. This alternator is suitable for tender and government procurement programs that require clear technical specifications, OEM cross-reference data, and traceable quality control documentation. Additional compliance documents can be provided upon request.
The air-cooled 40SI design is optimized for continuous-duty operation. It maintains stable output during extended idling, high ambient temperatures, and sustained electrical load, which are common conditions in fleet and construction equipment use.
To ensure correct matching, distributors should confirm the OEM reference number, system voltage (12V), required output range (240A or 275A), and J180 short hinge mounting. Providing the original alternator part number allows for fast and accurate cross-reference confirmation.
Yes. This product is supplied globally to distributors, fleet service providers, and OEM buyers across North America, Europe, South America, and other commercial vehicle markets. Export-ready packaging and documentation are available to support international logistics.
