This 55SI 12V 430A heavy duty alternator is an OE-quality new replacement designed for high electrical load commercial and industrial applications. Featuring a SAE J180 hinge mount, it offers direct fitment and reliable performance as a replacement for Delco Remy 61003345 / 240-4263. Engineered for continuous-duty operation, this alternator delivers stable high-output charging for heavy-duty trucks, off-highway equipment, and industrial power systems where durability and electrical reliability are critical.
61003345、240-4263
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 55SI 12V 430A heavy duty alternator is engineered to meet the demands of professional buyers operating in high-load, mission-critical environments.
Wholesale distributors and importers requiring stable quality, cross-reference compatibility (61003345 / 240-4263), and reliable long-term supply for aftermarket programs.
Fleet maintenance and operations teams managing heavy-duty trucks and commercial vehicles, where OE-level reliability, consistent output, and reduced downtime are essential.
Heavy-duty equipment repair workshops servicing mining machinery, buses, construction equipment, and other industrial platforms that rely on high-output 12V charging systems.
OEM and project-based buyers seeking J180 hinge mount configurations, specific electrical interfaces, voltage regulation options, or private labeling for customized applications.
Tender, municipal, and government procurement programs that require technical documentation, traceability, and compliance-ready alternator solutions for large-scale deployments.
Engineered as a direct-fit replacement for Delco Remy 55SI alternators, this unit precisely matches SAE J180 hinge mounting, electrical interfaces, and dimensional specifications. It ensures straightforward installation with no modification required, reducing labor time and fitment risk for fleets, workshops, and distributors.
Designed to deliver stable, high-current output up to 430A, this 55SI alternator supports extreme electrical demands including HVAC systems, high-power lighting, cooling fans, telematics, battery banks, inverters, and auxiliary equipment commonly used in heavy-duty trucks, industrial vehicles, and off-highway machinery.
Featuring an optimized air-cooled design, the alternator maintains controlled operating temperatures under prolonged high-load conditions, frequent idling, and continuous-duty cycles. This thermal efficiency helps extend service life and ensures consistent performance in demanding commercial environments.
Built with high-purity copper windings, an oversized rectifier assembly, sealed heavy-duty bearings, a reinforced aluminum housing, and a dynamically balanced rotor, the alternator is designed to withstand vibration, heat, and harsh operating conditions while maintaining reliable output over extended service intervals.
Every unit undergoes comprehensive end-of-line testing, including full-load output verification, voltage regulation accuracy, thermal stability, vibration resistance, and electrical performance validation. This ensures each alternator meets OE-level reliability standards before shipment.
| Specification | Details |
|---|---|
| Model | WB2451 |
| Type | 55SI Heavy-Duty Alternator Replacement |
| System Voltage | 12V |
| Rated Output | 430A |
| Cooling System | Air-Cooled |
| Mounting Type | SAE J180 Hinge Mount |
| Voltage Regulator | Internal Regulator |
| Rotation Direction | Clockwise (viewed from pulley side) |
| Output Terminal | B+ High-Current Stud |
| Ground Type | Negative Ground |
| Housing Material | High-strength aluminum alloy |
| Reference Numbers | 61003345 / 240-4263 / 7414 |
| Design Standard | OE-quality direct replacement |
| Application Environment | Heavy-duty trucks, buses, off-highway equipment, industrial vehicles |
| Duty Cycle | Continuous-duty, ultra high electrical load operation |
| Brand / Reference Type | Part Number |
|---|---|
| Delco Remy | 61003345 |
| Delco Remy | 240-4263 |
| Delco Remy | 7414 |
| Aftermarket Reference | WB2451 |
| Aftermarket Reference | 430A High Output Replacement |
| OEM / Equivalent Series | 55SI 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)
The 55SI 12V 430A alternator is compatible with a wide range of heavy-duty trucks, buses, off-highway machinery, and industrial diesel engines. It is ideal for commercial fleets, construction equipment, mining vehicles, and other high electrical load applications requiring OE-quality replacement for Delco Remy 61003345 / 240-4263 / 7414.
Yes. The WB2451 is engineered as a direct-fit replacement, matching the J180 hinge mount, electrical interfaces, and mechanical dimensions. No modifications or additional adapters are required, ensuring quick installation for fleet maintenance teams and OEM projects.
This alternator delivers 12V 430A output, designed for continuous-duty high-load operation. It reliably powers HVAC systems, lighting, engine cooling fans, battery banks, telematics, and auxiliary equipment, making it suitable for heavy-duty industrial and commercial vehicles worldwide.
The WB2451 features an air-cooled design and is built with high-purity copper windings, oversized rectifier assembly, sealed heavy-duty bearings, reinforced aluminum housing, and dynamically balanced rotor. This ensures stable performance, reduced vibration, and long service life under harsh conditions.
Yes. OEM and project buyers can request specific mounting configurations, electrical connectors, voltage settings, or private labeling. The WB2451 series supports flexible adaptation for commercial, industrial, and government procurement projects.
Yes. It features an internal voltage regulator, ensuring consistent charging performance and protection for sensitive onboard electronics across varying engine speeds and load conditions.
Every WB2451 alternator undergoes 100% end-of-line testing, including full-load output verification, voltage regulation accuracy, thermal stability, vibration resistance, and overall electrical performance. This ensures OE-level reliability for distributors, fleets, and industrial users globally.
The alternator cross-references:
Delco Remy: 61003345, 240-4263, 7414
Aftermarket / Replacement: WB2451, 430A High Output Replacement
Equivalent Series: 55SI Air-Cooled Alternator Series
This allows distributors and maintenance teams to match with existing inventory and aftermarket alternatives.
Yes. The WB2451 is designed for international heavy-duty applications. Its standard J180 hinge mount and universal 12V/430A specification make it suitable for North America, Europe, Middle East, Africa, and Asia heavy-duty vehicles and equipment.
The WB2451 combines OE-quality direct replacement accuracy, ultra-high 430A output, continuous-duty reliability, and robust construction. It reduces downtime, simplifies maintenance, and provides predictable electrical performance, making it ideal for commercial fleets, mining, construction, and industrial operations seeking reliable long-term alternator solutions.
