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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 1984-1985 Pontiac J2000 SunbirdAlternator Rectifier Diode for 1984-1985 Pontiac J2000 Sunbird
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1984-1985 Pontiac J2000 Sunbird
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VLQD
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode for 1977-1984 Pontiac Phoenix
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1977-1984 Pontiac Phoenix
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Phoenix: 1977 1978 1979 1980 1981 1982 1983 1984
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VR14
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode with Trio for 1999-2001 Mercedes-Benz E55 AMG
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1999-2001 Mercedes-Benz E55 AMG
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz E55 AMG: 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #101840KU
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1986 Dodge Power Ram 50
A-Premium®Part # APALR129
Alternator Rectifier Diode with Aluminum Heat Sinks for 1986 Dodge Power Ram 50
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Dodge Power Ram 50
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184HGR
Note
【Note-1】 12 Volt, 94mm OD, 6-35 Ampere Diodes.
【Note-2】 This item comes with Trio & Aluminum Heat Sinks.
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Alternator Rectifier Diode for 2010 Dodge Ram 2500
A-Premium®Part # APALR076
Alternator Rectifier Diode for 2010 Dodge Ram 2500
52 Reviews
$43.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2010 Dodge Ram 2500
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018414Q
Note
12 Volt, 128mm OD, 12-50 Avalanche Diodes, M8×59.5mm Battery Post.
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Alternator Rectifier Diode with Trio for 1990-1993 Volkswagen Passat
A-Premium®Part # APALR178
Alternator Rectifier Diode with Trio for 1990-1993 Volkswagen Passat
52 Reviews
$26.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Passat: 1990 1991 1992 1993
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183XT2
Note
14 Volt, 114mm OD, 6-35A Avalanche Diodes, M8×52.5mm Battery Post, M5×43.7mm Trio Post, with Trio.
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Alternator Rectifier Diode with Trio for 1983-1985 Volkswagen Vanagon
A-Premium®Part # APALR053
Alternator Rectifier Diode with Trio for 1983-1985 Volkswagen Vanagon
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Vanagon: 1983 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183XVN
Note
【Note-1】 12 Volt, 8-35 Ampere Diodes, M8×52mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Trio for 1984-1985 Volkswagen Scirocco
A-Premium®Part # APALR053
Alternator Rectifier Diode with Trio for 1984-1985 Volkswagen Scirocco
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Scirocco: 1984 1985
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183Y0Q
Note
【Note-1】 12 Volt, 8-35 Ampere Diodes, M8×52mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode for 1999-2001 2003-2007 Ford F-450 Super Duty
A-Premium®Part # APALR117
Alternator Rectifier Diode for 1999-2001 2003-2007 Ford F-450 Super Duty
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford F-450 Super Duty: 1999 2000 2001 2003 2004 2005 2006 2007
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Quantity1
Item LocatedUnited States
ConditionNew
item #10196728
Note
12 Volt; 136mm OD; 8-35A General Diodes.
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Alternator Rectifier Diode for 1999-2001 Ford E-350 Econoline Club Wagon
A-Premium®Part # APALR117
Alternator Rectifier Diode for 1999-2001 Ford E-350 Econoline Club Wagon
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford E-350 Econoline Club Wagon: 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #101964WW
Note
12 Volt; 136mm OD; 8-35A General Diodes.
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Alternator Rectifier Diode for 2002-2007 Ford F-250 Super Duty
A-Premium®Part # APALR117
Alternator Rectifier Diode for 2002-2007 Ford F-250 Super Duty
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford F-250 Super Duty: 2002 2003 2004 2005 2006 2007
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Quantity1
Item LocatedUnited States
ConditionNew
item #101968A8
Note
12 Volt; 136mm OD; 8-35A General Diodes.
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Alternator Rectifier Diode with Trio/Capacitor for 1991-1995 Dodge Stealth
A-Premium®Part # APALR122
Alternator Rectifier Diode with Trio/Capacitor for 1991-1995 Dodge Stealth
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Stealth: 1991 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018419G
Note
【Note-1】 12 Volt, 6-35A General Diodes, With M6×49.5mm Battery Post.
【Note-2】 It not fits the model with 90 Amp.
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Alternator Rectifier Diode for 1991-1992 Nissan Axxess
A-Premium®Part # APALR148
Alternator Rectifier Diode for 1991-1992 Nissan Axxess
52 Reviews
$31.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Axxess: 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184G9N
Note
12 Volt, 85mm OD, 8-35 Ampere Diodes, With M5×44mm Battery Post
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Alternator Rectifier Diode for 1987-1988 Mitsubishi Mirage
A-Premium®Part # APALR144
Alternator Rectifier Diode for 1987-1988 Mitsubishi Mirage
52 Reviews
$26.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Mirage: 1987 1988
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184110
Note
【Note-1】 12 Volt, 96.7mm OD, 6-35A Diodes, M5×49mm Battery Post, with Trio.
【Note-2】 For Mitsubishi Mirage, this item fits the model to 4/1988.
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Alternator Rectifier Diode for 1999-2004 Jeep Grand Cherokee
A-Premium®Part # APALR138
Alternator Rectifier Diode for 1999-2004 Jeep Grand Cherokee
52 Reviews
$36.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep Grand Cherokee: 1999 2000 2001 2002 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184U2X
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, With M8×22mm Battery Post(L), With M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 2003-2006 Dodge Durango
A-Premium®Part # APALR138
Alternator Rectifier Diode for 2003-2006 Dodge Durango
52 Reviews
$36.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Durango: 2003 2004 2005 2006
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184TLV
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, With M8×22mm Battery Post(L), With M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 2003-2004 Cadillac Escalade ESV
A-Premium®Part # APALR039
Alternator Rectifier Diode for 2003-2004 Cadillac Escalade ESV
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac Escalade ESV: 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #101841R0
Note
12V, 116mm OD, 6-50A Avalanche Diodes, M6×53.5mm Battery Post
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Alternator Rectifier Diode for 2003-2005 Chevrolet C4500 Kodiak
A-Premium®Part # APALR039
Alternator Rectifier Diode for 2003-2005 Chevrolet C4500 Kodiak
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C4500 Kodiak: 2003 2004 2005
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183WTQ
Note
12V, 116mm OD, 6-50A Avalanche Diodes, M6×53.5mm Battery Post
Show less
Alternator Rectifier Diode for 2002-2004 Cadillac Escalade
A-Premium®Part # APALR039
Alternator Rectifier Diode for 2002-2004 Cadillac Escalade
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac Escalade: 2002 2003 2004
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1018426H
Note
12V, 116mm OD, 6-50A Avalanche Diodes, M6×53.5mm Battery Post
Show less
Alternator Rectifier Diode with Trio for 2002 2005 Mercedes-Benz ML500
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 2002 2005 Mercedes-Benz ML500
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz ML500: 2002 2005
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183XS0
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
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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.

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