Voltage Regulators
- ACDelco®Professional™ Voltage RegulatorProfessional™ Voltage Regulator by ACDelco®. Get the proper voltage to your vehicle’s critical systems with ACDelco Professional Voltage Regulators. Built as the ideal replacement part for your worn Original Equipment, ACDelco...Delivers needed system voltage and provides the proper fit, form and function to let your vehicle run the way it was designedDesigned to deliver trouble-free, consistent performance$36.66 - $365.46
- Beru®Voltage RegulatorVoltage Regulator by Beru®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues with...Designed to help bring your vehicle back in its tip-top conditionFaithful reproduction of the original part in quality, look, and function$27.64 - $76.58
- ACDelco®Genuine GM Parts™ Voltage RegulatorGenuine GM Parts™ Voltage Regulator by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$22.91 - $66.09
- Genuine®Voltage RegulatorVoltage Regulator by Genuine®. If your starting and charging system parts are in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain store. At...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$46.25 - $410.22
- Standard®Intermotor™ Voltage RegulatorIntermotor™ Voltage Regulator by Standard®. Standard is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$28.48 - $874.76
- Standard®Tru-Tech™ Voltage RegulatorTru-Tech™ Voltage Regulator by Standard®. Designed utilizing the latest technology, this product by Standard features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$10.76 - $41.01
- Standard®Voltage RegulatorVoltage Regulator by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for integrity to all channels of...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$16.59 - $298.27
- WVE®Voltage RegulatorVoltage Regulator by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed the OEM...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$14.69 - $2,068.06
- Vemo®Voltage RegulatorVoltage Regulator by Vemo®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues with...Expertly built according to stringent OEM specificationsMade to enable as safe battery recharging as possible$15.80 - $460.34
- ACDelco®GM Original Equipment Voltage RegulatorGM Original Equipment Voltage Regulator by ACDelco®. Get the proper voltage to your vehicle’s critical systems with ACDelco GM OE Voltage Regulators. Built as the ideal replacement part for your worn GM equipment, ACDelco GM OE...Outstanding radio noise control for better performance.Delivers needed system voltage and provides the proper fit, form and function to let your vehicle run the way it was designed.$115.52
- Motorcraft®Voltage RegulatorVoltage Regulator by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM quality without...Direct OEM replacementMeets strict Ford Motor Company standards$49.78
- Mopar®Voltage RegulatorVoltage Regulator by Mopar®. Want your prized possession to look and perform the way it was designed to? Then top-of-the-line Mopar automotive parts and accessories are for you. Made using the latest manufacturing technology to meet the...Ideal solution to keep your vehicle in top shapeCrafted from premium-grade materials and the latest technology$18.54 - $319.67
- Bosch®El Field RheostatEl Field Rheostat by Bosch®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the factory original. Made...100% new, not rebuiltOE design to ensure exact fit, form and function$13.07
- Bosch®Voltage RegulatorVoltage Regulator by Bosch®. Efficiency and quality are the key characteristics of multi-function regulators designed to protect vehicle electronic systems. This unique Bosch invention is not only responsible for checking and regulating...OE quality parts from top original equipment and aftermarket manufacturersReliable engine starting$32.71 - $86.36
- Genuine®Alternator Diode RelayAlternator Diode Relay by Genuine®. If your starting and charging system parts are in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$27.71
- Valeo®Voltage RegulatorVoltage Regulator by Valeo®. Designed utilizing the latest technology, this product by Valeo features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$43.96 - $120.98
- Vemo®Alternator RegulatorAlternator Regulator by Vemo®. Grade: Aftermarket. Vemo products are made by high-quality materials and undergo strict quality tests. They are, thereby, the perfect alternative to the original part.Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$43.29 - $276.77
- Aftermarket®Voltage RegulatorVoltage Regulator by Aftermarket®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues...Expertly built according to stringent OEM specificationsMade to enable as safe battery recharging as possible$23.58 - $71.32
- Hella®Voltage RegulatorVoltage Regulator by Hella®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues with...Expertly built according to stringent OEM specificationsMade to enable as safe battery recharging as possible$103.35
- Hitachi®Voltage RegulatorVoltage Regulator by Hitachi®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues with...Expertly built according to stringent OEM specificationsMade to enable as safe battery recharging as possible$28.09 - $144.67
- Huco®Voltage RegulatorVoltage Regulator by Huco®. A voltage regulator is one of the vehicle components responsible for ensuring that your battery is recharged safely and electrical components get the specific power level they need. If you have issues with...Expertly built according to stringent OEM specificationsMade to enable as safe battery recharging as possible$49.66 - $78.82
- Original Equipment®Voltage RegulatorVoltage Regulator by Original Equipment®. Designed utilizing the latest technology, this product by Original Equipment features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...Perfect replacement for your damaged or worn out original partMade using high-grade materials for long-lasting dependability$41.35 - $82.56
- Standard®Handypack™ Voltage Regulator ConnectorHandypack™ Voltage Regulator Connector by Standard®. SMP's vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation for...Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle$2.99 - $6.32
- ACDelco®Professional™ Alternator BrushProfessional™ Alternator Brush by ACDelco®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the...Designed in compliance with rigorous factory standardsHigh level of quality, ultimate reliability, and solid value$3.61 - $23.72
- ACDelco®Professional™ Alternator Brush HolderProfessional™ Alternator Brush Holder by ACDelco®. This superior product was elaborately designed and meticulously manufactured to stringent industry standards to have the most precise OE specifications. It fits and functions like the...Designed in compliance with rigorous factory standardsHigh level of quality, ultimate reliability, and solid value$11.19
- ACDelco®Professional™ Voltage Regulator ConnectorProfessional™ Voltage Regulator Connector by ACDelco®. Get the proper voltage to your vehicle’s critical systems with ACDelco Professional Voltage Regulator Connectors. Built as the ideal replacement part for your worn Original...Outstanding radio noise control for better performanceDelivers needed system voltage and provides the proper fit, form and function to let your vehicle run the way it was designed$7.58 - $14.14
- ACDelco®Professional™ Voltage Regulator PigtailProfessional™ Voltage Regulator Pigtail by ACDelco®. Get the proper voltage to your vehicle’s critical systems with ACDelco Professional Voltage Regulators. Built as the ideal replacement part for your worn Original Equipment,...Outstanding radio noise control for better performanceDelivers needed system voltage and provides the proper fit, form and function to let your vehicle run the way it was designed$26.19
- Motorcraft®Voltage Converter ConnectorVoltage Converter Connector by Motorcraft®. Motorcraft is the way to restore the performance of your vehicle. Designed specifically for your vehicle, Motorcraft products meet stringent Ford Motor Company standards and feature OEM...Direct OEM replacementMeets strict Ford Motor Company standards$35.97 - $68.45
- Dorman®Voltage Regulator ConnectorVoltage Regulator Connector by Dorman®. Dorman offers a comprehensive line of Voltage Regulator Connectors for a wide range of applications. All Voltage Regulator Connectors are constructed of high-quality materials for long-lasting...Direct replacement Voltage Regulator Connectors available to ensure a proper fitVehicle try-on testing has been conducted on this part to ensure a trouble-free performance$2.65 - $14.31
- Genuine®Alternator Brush AssemblyAlternator Brush Assembly by Genuine®. If your starting and charging system parts are in need of repair, don't compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain...Designed to restore your vehicle’s starting and charging systemGenuine OE replacement parts from the OE manufacturer$28.54 - $57.86
To prevent damage to the battery and the rest of the electrical system that would be caused by excessive alternator voltage output, the charging system incorporates a voltage regulator to maintain alternator output within a predetermined range, typically between 13.5 and 14.5 volts. The regulator controls alternator output by sensing the battery voltage and system demand and then varying the field current to the alternator rotor accordingly.
When voltage falls below the regulator setting, such as would occur when the battery needs charging and the lights are turned on, the field current is increased, which strengthens the magnetic field and increases the charging voltage output. If the battery is fully charged and no accessories are on, and voltage exceeds the maximum setting, the regulator will decrease field current, which weakens the magnetic field and decreases voltage output.
Older vehicles used a mechanical, externally mounted voltage regulator. These used coils and contact points to regulate power to the alternator rotor, but the points eventually suffered from pitting and sticking, which could result in overcharging. Mechanical voltage regulators were replaced by electronic, solid state, voltage regulators that use transistors. Where mechanical voltage regulators generally switch on and off about 200 times per second, solid state regulators can do so approximately 7,000 times per second. Solid state regulators are available as an upgrade for many original mechanical regulator applications.
On many vehicles, external regulators were eventually supplanted by internal regulators that are integral with the alternator, which saved space and simplified wiring. Today voltage regulator function is handled by the Powertrain Control Module (PCM) on most vehicles. In addition to battery voltage and electrical demand, factors including battery temperature, ambient temperature, engine load, and other inputs are commonly used by the PCM to calculate charging system output. But if your vehicle is equipped with a traditional voltage regulator, no matter where it’s mounted, we can supply you with a quality replacement.
If you’re restoring a classic car, where appearance is just as important as functionality, we can supply you with an original equipment voltage regulator that has the right look for your engine compartment and will properly regulate voltage to protect your electrical system. If your vehicle is equipped with a solid state regulator or you want to upgrade to their superior reliability, we have the electronic regulators for all popular applications. We even offer integral voltage regulators for select applications, so you don’t have to replace the entire alternator because of a failed regulator.