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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 Diodes for 1999-2002 Mercury VillagerAlternator Rectifier Diodes for 1999-2002 Mercury Villager
A-Premium®Part # APALR012
Alternator Rectifier Diodes for 1999-2002 Mercury Villager
52 Reviews
$55.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercury Villager: 1999 2000 2001 2002
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Quantity1
Item LocatedUnited States
ConditionNew
item #101521Q3
Note
8-35A Diodes, M8×59.5mm Battery Post.
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Alternator Rectifier Diode for 2004-2005 Volkswagen Passat
A-Premium®Part # APALR024
Alternator Rectifier Diode for 2004-2005 Volkswagen Passat
52 Reviews
$51.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Passat: 2004 2005
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015269L
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, M8×22mm Battery Post(L), M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 2001-2005 Mercedes-Benz C240
A-Premium®Part # APALR024
Alternator Rectifier Diode for 2001-2005 Mercedes-Benz C240
52 Reviews
$51.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz C240: 2001 2002 2003 2004 2005
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Quantity1
Item LocatedUnited States
ConditionNew
item #101523C5
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, M8×22mm Battery Post(L), M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 2002-2003 Mercedes-Benz ML320
A-Premium®Part # APALR024
Alternator Rectifier Diode for 2002-2003 Mercedes-Benz ML320
52 Reviews
$51.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz ML320: 2002 2003
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Quantity1
Item LocatedUnited States
ConditionNew
item #101521V5
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, M8×22mm Battery Post(L), M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 1999-2006 2010 Volkswagen Beetle
A-Premium®Part # APALR024
Alternator Rectifier Diode for 1999-2006 2010 Volkswagen Beetle
52 Reviews
$51.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Beetle: 1999 2000 2001 2002 2003 2004 2005 2006 2010
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Quantity1
Item LocatedUnited States
ConditionNew
item #101525VN
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, M8×22mm Battery Post(L), M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 1997 Mitsubishi Mirage
A-Premium®Part # APALR166
Alternator Rectifier Diode for 1997 Mitsubishi Mirage
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1997 Mitsubishi Mirage
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCX1
Note
This item is a 12 Volt, 6–35A block/ampere diode with 106 mm OD and an M8×54 mm battery post.
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Alternator Rectifier Diode for 1971-1980 Buick LeSabre
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1980 Buick LeSabre
52 Reviews
$33.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LHN1
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode with Heat Sinks for 2007-2008 Freightliner Sprinter 2500
A-Premium®Part # APALR153
Alternator Rectifier Diode with Heat Sinks for 2007-2008 Freightliner Sprinter 2500
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Sprinter 2500: 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPDR
Note
This item is a 12 Volt, 6–50A avalanche diode with 129 mm OD, an M8×34.5 mm battery post (L), and an M8×22 mm battery post (R).
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Alternator Rectifier Diode with Insulator for 1999-2001 Sterling Truck A9513
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2001 Sterling Truck A9513
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck A9513: 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9QX
Note
This item is a 12 Volt, 6–50A press-fit/avalanche diode with 116 mm OD and a 5/16''×45 mm battery post.
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Alternator Rectifier Diode for 1984-1986 Oldsmobile Custom Cruiser
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1984-1986 Oldsmobile Custom Cruiser
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Custom Cruiser: 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6TN
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 94.9 mm OD.
【Note-2】 For 1984-1986 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
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Alternator Rectifier Diode With Trio for 1989-1994 Suzuki Sidekick
A-Premium®Part # APALR121
Alternator Rectifier Diode With Trio for 1989-1994 Suzuki Sidekick
52 Reviews
$30.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Suzuki Sidekick: 1989 1990 1991 1992 1993 1994
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LKYC
Note
This item is a 14 Volt, 8–35A block/ampere diode with an M6×49.5 mm battery post.
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Alternator Rectifier for 1989-1992 Eagle Summit
A-Premium®Part # APALR025
Alternator Rectifier for 1989-1992 Eagle Summit
52 Reviews
$36.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Eagle Summit: 1989 1990 1991 1992
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Quantity1
Item LocatedUnited States
Part interchange
A860T35270, E9PZ10304B, 135252, RM-41, IMR10040
ConditionNew
item #1013GPQK
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Alternator Rectifier for 2001-2005 Honda Civic
A-Premium®Part # APALR030
Alternator Rectifier for 2001-2005 Honda Civic
52 Reviews
$33.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Honda Civic: 2001 2002 2003 2004 2005
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Quantity1
Item LocatedUnited States
Part interchange
A860X83370, 235297, IMR7579, RM-136
ConditionNew
item #1013GTY7
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Alternator Rectifier Diode for 1989 GMC R2500 Suburban
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1989 GMC R2500 Suburban
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPSC
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 1990-1995 GMC C2500
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1990-1995 GMC C2500
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC C2500: 1990 1991 1992 1993 1994 1995
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPQX
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 1989 GMC R3500
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1989 GMC R3500
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLVV
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 1992-1995 GMC C1500 Suburban
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1992-1995 GMC C1500 Suburban
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC C1500 Suburban: 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL04
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 2001 2003-2009 Dodge Ram 2500
A-Premium®Part # APALR084
Alternator Rectifier Diode for 2001 2003-2009 Dodge Ram 2500
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 2500: 2001 2003 2004 2005 2006 2007 2008 2009
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL4H
Note
This item is a 12 Volt, 6-60A diode with 120 mm OD, an M8×59.5 mm battery post (L) and an M8×22 mm battery post (R).
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Alternator Rectifier Diode for 2008-2009 Dodge Ram 5500
A-Premium®Part # APALR084
Alternator Rectifier Diode for 2008-2009 Dodge Ram 5500
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 5500: 2008 2009
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLQG
Note
This item is a 12 Volt, 6-60A diode with 120 mm OD, an M8×59.5 mm battery post (L) and an M8×22 mm battery post (R).
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Alternator Rectifier Diode with Trio for 1986-1987 Mazda 626
A-Premium®Part # APALR097
Alternator Rectifier Diode with Trio for 1986-1987 Mazda 626
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda 626: 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8KH
Note
This item is a 14 Volt, 6-35A block/ampere diode with an M5×49 mm battery post.
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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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