55SI 24V 250A Heavy Duty Alternator – Delco Remy OEM Compatible (61006082 / 8600453)

Designed for Heavy-Duty Fleets, Distributors, and OEM Buyers

This 55SI 24V 250A heavy duty alternator is engineered to meet the demands of professional buyers operating in high-load, mission-critical environments.

• Wholesale distributors seeking a reliable supply of 55SI 24V 250A alternators with consistent stock and clear OEM compatibility (61006082 / 8600453).

• Fleet maintenance teams demanding OE-level reliability at competitive costs for trucks, buses, and industrial vehicles.

• Heavy-duty machinery repair workshops managing construction, mining, and off-highway equipment requiring durable, brushless alternators with standard 80mm pad mount.

• OEM project buyers needing custom mounting options, electrical connectors, voltage configurations, or private labeling for their fleet or machinery projects.

• Tender and government procurement programs requiring full certifications, documentation, and high-quality compliance for large-scale industrial or municipal projects.

Key Advantages of Delco Remy 55SI 24V 250A Heavy Duty Alternator

OE-Level Replacement Accuracy

Designed as a direct-fit replacement for Delco Remy 55SI alternators, this unit matches original OEM mounting (Standard 80mm pad), electrical interfaces, and performance specifications, ensuring smooth installation with no modification required. Compatible with OEM numbers 61006082 / 8600453 / 8600483 / 8600739 / 8600807.

High Output 24V / 250A Performance

Delivers stable high-current output to support demanding electrical loads in heavy-duty vehicles, including engine cooling systems, lighting, telematics, battery charging, HVAC, and auxiliary equipment, ensuring reliable operation under continuous or peak load conditions.

Optimized Cooling for Continuous Duty

Engineered with an efficient air-cooled design, the alternator maintains controlled operating temperatures during prolonged operation, frequent idling, and high-load cycles, supporting long service life in commercial, industrial, and off-highway applications.

Heavy-Duty Internal Components

Built with high-purity copper windings, oversized rectifier assembly, sealed heavy-duty bearings, a reinforced aluminum housing, and a dynamically balanced rotor, ensuring 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 and B2B-grade quality before shipment.

Technical Specifications of the 55SI 24V 250A Heavy-Duty Alternator

Cross-Reference Compatibility for Delco Remy 55SI Applications

Applications of Equipment Using 55SI-Type Alternators 

Heavy-duty trucks

Construction machinery

Agricultural tractors and harvesters

Buses and transport vehicles

Mining and off-road machinery

Power generation auxiliary systems

Elecdurauto OE-Level Manufacturing for Heavy-Duty Water-Cooled Alternators

CNC Machining Center

Precision machining for water-cooled housings and end covers to ensure perfect fitment, stable structure, and OE-level heat dissipation.

Automatic Stator Winding Machine

Automated winding and inserting systems deliver consistent copper density, insulation stability, and long-life electrical performance.

Rotor Dynamic Balancing Machine

High-precision balancing ensures smooth rotation, reduced vibration, and reliable performance under high-RPM duty cycles.

Torque-Controlled Assembly Line

Semi-automatic stations with torque control & poka-yoke guarantee fastening accuracy and consistent assembly quality.

Alternator Performance Test Bench (100% Final Test)

Every alternator is tested for output current, voltage regulation, rectifier integrity, and electrical safety before packaging.

High-Temperature & Endurance Test Chamber

Thermal cycling and full-load endurance tests validate heat resistance and long-term durability in heavy-duty applications.

Quality Assurance & Testing (OE-Grade Replacement Standards)

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.

Why Distributors and OEM Buyers Choose Elecdurauto as Their Alternator Partner

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

OEM Project Case from Elecdurauto Water-Cooled Alternator Supplier for Global Heavy-Duty Brands

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.

Water-Cooled Alternator Assembly

Stator Coil Precision Winding

Finished Heavy-Duty Alternator

OEM Packaging & Inventory

Bulk Export-Ready Stock

Rotor & Fan Subassembly

High-Output Alternator Housing

Cooling-Enhanced Rear Cover

Elecdurauto Core Advantages for Replacement Alternators

1. Exclusive Products – Unique in Global Markets

Certain alternator models and assemblies are exclusively developed by Elecdurauto and unavailable from other factories.

2. Fast Response – Inquiries Answered Within 24 Hours

I ensure fast communication to support your purchasing schedule and project decisions.

3. Custom Tooling – Rapid New Product Development

I support OEM/ODM development, custom tooling, label customization, and new-model prototyping.

4. Pricing Advantage – Lowest Global Pricing for Many SKUs

New SKUs are launched at highly competitive prices, and many existing models remain the lowest-cost option worldwide.

Buyer Protection, Warranty, and Global Supply Support

• 18-month warranty

• Pre-shipment photos and videos

• Serial number tracking

• Replacement for QC-approved claims

• Support for third-party inspection (SGS, TUV, BV)

Frequently Asked Questions – 55SI 24V 250A Heavy-Duty Alternator 

1. What vehicles and equipment is the 55SI 24V 250A alternator compatible with？

This alternator is suitable for heavy-duty trucks, buses, construction machinery, mining equipment, and industrial vehicles. It supports 24V electrical systems with 250A output, ensuring reliable operation under continuous-duty and high-load conditions.

2. Which OEM or replacement numbers does this 55SI alternator support？

It is compatible with Delco Remy OEM numbers 61006082, 8600453, 8600483, 8600739, 8600807, as well as aftermarket reference 240‑4162 and program code WB2455, making it ideal for B2B fleet maintenance and industrial spare parts procurement.

3. Can this alternator be installed without modification?

Yes, the 55SI 24V 250A alternator is designed as a direct-fit replacement with standard 80mm pad mount, matching original mounting points and electrical interfaces. No modification is required for installation.

4. Does this alternator support continuous heavy-duty operation?

Absolutely. It features air-cooled architecture, brushless design, and high-quality internal components, maintaining stable output during long hours, frequent idling, and high-load cycles in industrial or commercial environments.

5. What are the key technical specifications of the 55SI alternator?

• Voltage: 24V

• Output: 250A

• Mounting: Standard Pad (80mm)

• Rotation: Clockwise (viewed from pulley side)

• Regulator: Internal

• Ground Type: Negative

• Housing: Reinforced aluminum alloy
  These specs ensure OE-level performance for fleet and industrial applications.

6. How durable is this alternator for industrial and off-highway applications?

It is built with high-purity copper windings, oversized rectifier, sealed heavy-duty bearings, and dynamically balanced rotor, delivering reliable performance under vibration, temperature extremes, and harsh operating conditions.

7. Does this alternator undergo performance testing before shipment?

Yes, each unit undergoes 100% end-of-line testing, including full-load output verification, voltage regulation accuracy, vibration resistance, and thermal stability, ensuring consistent reliability for B2B customers.

8. Can OEM buyers request custom configurations?

Yes, OEM and project buyers can request custom mounting, electrical connectors, voltage settings, or private labeling, making this alternator suitable for tailored industrial solutions and large-scale fleet projects.

9. Is this alternator suitable for international or regional heavy-duty fleets?

Yes, it is widely used in North America, Europe, the Middle East, and industrial regions with heavy-duty trucks, buses, and off-highway equipment, ensuring compatibility with regional fleet and industrial standards.

10. What support or documentation is provided for B2B procurement?

We provide full OEM specifications, technical datasheets, certificates, and documentation required for fleet management, industrial maintenance, and tender/government procurement programs, facilitating smooth purchasing and compliance.