High Output Alternator for Dodge Ram 2500 (1999-2000) 5.2L
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High-Amperage 300A Replacement Alternator for 1999-2000 Dodge Ram 2500 (BR/BE)
What it Does: The 300-amp high-output alternator replaces the low-output factory charging unit on the 1999-2000 Dodge Ram 2500 to deliver sustained 12-volt system power, prevent voltage drop under heavy electrical loads, and maintain full battery charge at idle.
The Stock Dodge Ram 2500 Electrical Bottleneck
Factory charging systems on the BR/BE platform utilize standard round-wire stators rated for nominal factory demands (typically 117A to 136A). When loaded with high-draw accessories like winches, auxiliary lighting, snow plows, or aftermarket audio, OEM units experience thermal saturation, rotor slip under heat, and severe voltage collapse below 12.5V at idle. This thermal breakdown accelerates diode rectifier failure and leads to repeated dead-battery cycles.
The Engineering Solution
Engineered for high-demand work trucks, this direct-fit 300-amp alternator features an advanced hairpin stator configuration. Square-wire hairpin geometry increases copper slot fill density, drastically decreasing internal resistance and heat generation while yielding superior low-RPM amperage output. Built with a dynamically balanced rotor, heavy-duty sealed roller bearings, and an internal solid-state regulator, it drops directly into the OEM bracketry with zero harness splicing.
What's Included
- 1x High Output 300A Alternator (Part # 13843-300A)
Technical Specifications
| Fitment | 1999-2000 Dodge Ram 2500 |
|---|---|
| Engine / Chassis | 5.2L Magnum V8 / BR/BE |
| Stock Output | 230 hp / 300 lb-ft |
| Replaces OEM Part # | AL6402X, AL6401X, 56028237, 13843, 13843N |
Compatibility
- 1999 Dodge Ram 2500 5.2L V8 Gas
- 2000 Dodge Ram 2500 5.2L V8 Gas
Frequently Asked Questions & Fitment Warnings
Does this fit the BR/BE Ram 2500?
Yes, this is a direct bolt-in fit for the 1999-2000 Dodge Ram 2500 equipped with the 5.2L Magnum V8 engine.
Should I upgrade my electrical wiring during installation?
While physically plug-and-play, upgrading the primary B+ charging cable and engine-to-chassis grounds to 1/0 AWG ("Big 3" upgrade) is highly recommended to safely support peak 300-amp transfer without cable overheating.
The Heavy-Duty Truck Standard
Engineered to handle severe towing cycles, high-amperage payload tools, and heavy winching demands, this alternator guarantees consistent 14.2V-14.6V system stability under the harshest commercial and off-road duty cycles.
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