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Alternator Rectifier Bridge

1376 items

An alternator rectifier bridge uses diodes to convert alternating current into direct current for the vehicle's electrical system. Choose the bridge for the alternator design, comparing assembly layout, connections and mounting. It is a service component within the alternator rather than a complete alternator replacement.

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Alternator Rectifier Diode for 1993-1994 BMW 740iLAlternator Rectifier Diode for 1993-1994 BMW 740iL
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1993-1994 BMW 740iL
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 740iL: 1993 1994
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR2K
Note
This item is a 12 Volt, 12–50A diode with 122 mm OD, an M8×30 mm battery post, and trio.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B250
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B250
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B250: 1981 1982 1983 1984 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184R3Q
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
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Alternator Rectifier Diode for 1995-1996 Jaguar XJS
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1995-1996 Jaguar XJS
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10188326
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
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Alternator Rectifier Diode for 1996-1997 Dodge Viper
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1996-1997 Dodge Viper
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1018812C
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
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Alternator Rectifier Diode for 1991-1995 Acura Legend
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1991-1995 Acura Legend
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101884DC
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
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Alternator Rectifier Diode for 1992-1997 Volkswagen Passat
A-Premium®Part # APALR019
Alternator Rectifier Diode for 1992-1997 Volkswagen Passat
52 Reviews
$35.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Passat: 1992 1993 1994 1995 1996 1997
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1018412H
Note
【Note-1】 12 Volt, 112mm OD, 8-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode for 1992-1995 1997 Volkswagen EuroVan
A-Premium®Part # APALR019
Alternator Rectifier Diode for 1992-1995 1997 Volkswagen EuroVan
52 Reviews
$35.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen EuroVan: 1992 1993 1994 1995 1997
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183WSG
Note
【Note-1】 12 Volt, 112mm OD, 8-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1971-1974 Dodge B100 Van
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1971-1974 Dodge B100 Van
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B100 Van: 1971 1972 1973 1974
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184UE7
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1978 Dodge Charger
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1978 Dodge Charger
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Charger: 1970 1971 1972 1973 1974 1975 1976 1977 1978
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184QWU
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sink for 1977-1987 Dodge D150
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1977-1987 Dodge D150
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge D150: 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184Q40
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B350
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B350
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B350: 1981 1982 1983 1984 1985 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184S1A
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2013 Toyota Highlander
A-Premium®Part # APALR013
Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2013 Toyota Highlander
52 Reviews
$31.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Highlander: 2007 2008 2009 2010 2011 2012 2013
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015258D
Note
【Note-1】 14 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode with Trio for 1979-1981 BMW 528i
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1979-1981 BMW 528i
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 528i: 1979 1980 1981
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101526NG
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Trio for 1982-1983 BMW 528e
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1982-1983 BMW 528e
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 528e: 1982 1983
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101525Z6
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1977-1978 BMW 630CSi
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1977-1978 BMW 630CSi
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 630CSi: 1977 1978
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101524EH
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1973 Saab 99
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1973 Saab 99
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1973 Saab 99
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101525SV
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode for 1973 Chevrolet C20 Pickup
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1973 Chevrolet C20 Pickup
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101526DQ
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1987-1988 Chevrolet Cavalier
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1987-1988 Chevrolet Cavalier
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Cavalier: 1987 1988
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101525PH
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
Show less
Alternator Rectifier Diode for 1994-1996 Jaguar XJ12
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1994-1996 Jaguar XJ12
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1018818D
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
Show less
Alternator Rectifier Diode for 2007-2009 Hyundai Santa Fe
A-Premium®Part # APALR005
Alternator Rectifier Diode for 2007-2009 Hyundai Santa Fe
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10187ZQA
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
Show less
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Page 19 of 69

Alternator Rectifier Bridges

An alternator rectifier bridge uses diodes to convert the alternator's alternating current into direct current for the vehicle's electrical system. It is one part of the alternator, rather than a complete replacement alternator.

A-Premium offers rectifier assemblies for selected alternators. Their size, connections and internal diode configuration can differ, so select a bridge for the specific alternator being repaired.

Choosing An Alternator Diode Bridge

Identify the alternator and compare the replacement's mounting shape, outside diameter and electrical connections. The vehicle application helps narrow the choices, but the rectifier must also match the alternator installed in the vehicle.

A charging warning or a weak battery does not identify a failed rectifier by itself. The battery, drive belt, wiring and voltage regulator are also part of the charging-system diagnosis.

Frequently Asked Questions (FAQ)

What is the difference between a rectifier and a voltage regulator?

The rectifier converts alternating current to direct current; the regulator controls alternator voltage for the operating conditions. They perform different jobs even when both are mounted on the alternator.

Can a faulty alternator diode drain the battery when parked?

A faulty diode can contribute to battery discharge while the vehicle is off. Other electrical loads and battery problems can also cause a drain, so the charging system needs a proper diagnosis.

Why does the battery-post size matter?

The post connects the charging output to the vehicle's electrical cable. Its diameter and length must suit the connection and available space; an M6 post and an M8 post are different mounting specifications.

What do the heat sinks on a rectifier do?

A heat sink helps transfer heat away from the electronic components. Some A-Premium bridge listings identify aluminum heat sinks, but the design and supplied parts vary by product.

Can I disconnect the battery while the engine runs to test charging?

Keep the battery connected while the alternator is operating. HELLA warns that disconnecting the battery or connections with the engine running can create voltage spikes and damage components; use the specified diagnostic procedure instead.

Related Categories

Alternator Voltage Regulator
Alternator Voltage Regulator
Alternator
Alternator
Fuel Pump
Fuel Pump
Water Pump
Water Pump