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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 with Heat Sinks for 1986 Mercury CougarAlternator Rectifier Diode with Heat Sinks for 1986 Mercury Cougar
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1986 Mercury Cougar
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Mercury Cougar
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC9R
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
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Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford Bronco II
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford Bronco II
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford Bronco II: 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9GY
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
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Alternator Rectifier Diode with Heat Sinks for 1986 Ford Thunderbird
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1986 Ford Thunderbird
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Ford Thunderbird
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8X2
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
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Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford E-350 Econoline
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford E-350 Econoline
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford E-350 Econoline: 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7HG
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
Show less
Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford E-250 Econoline Club Wagon
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford E-250 Econoline Club Wagon
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford E-250 Econoline Club Wagon: 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6XX
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
Show less
Alternator Rectifier Diode for 2006 2008 Volkswagen Jetta
A-Premium®Part # APALR082
Alternator Rectifier Diode for 2006 2008 Volkswagen Jetta
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Jetta: 2006 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRH0
Note
This item is a 12 Volt, 6-50A avalanche diode with 120 mm OD, an M8×22 mm battery post (L) and an M8×32 mm battery post (R).
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Alternator Rectifier Diode for 1986-1990 Cadillac Fleetwood
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1986-1990 Cadillac Fleetwood
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR9X
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode with Trio for 1986-1989 Hyundai Excel
A-Premium®Part # APALR096
Alternator Rectifier Diode with Trio for 1986-1989 Hyundai Excel
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Hyundai Excel: 1986 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LLS3
Note
【Note-1】 This item is a 12 Volt, 6-35A block/ampere diode with trio.
【Note-2】 For Dodge & Plymouth Colt L4 1.6L, this item only fits the vehicle built before 5/1986.
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Alternator Rectifier Diode for 2015 Audi Q3
A-Premium®Part # APALR146
Alternator Rectifier Diode for 2015 Audi Q3
52 Reviews
$27.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2015 Audi Q3
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC49
Note
This item is a 12 Volt, 6-50A avalanche diode with 120 mm OD, an M8×32 mm battery post (L) and an M8×26 mm battery post (R).
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Alternator Rectifier Diode for 2008-2010 Dodge Ram 4500
A-Premium®Part # APALR084
Alternator Rectifier Diode for 2008-2010 Dodge Ram 4500
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 4500: 2008 2009 2010
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLAR
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 2004-2005 2007 2011 Toyota Yaris
A-Premium®Part # APALR145
Alternator Rectifier Diode for 2004-2005 2007 2011 Toyota Yaris
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Yaris: 2004 2005 2007 2011
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQ6G
Note
This item is a 12 Volt, 8-50A avalanche diode with 120 mm OD and an M8×22 mm battery post.
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Alternator Rectifier Diode with Trio for 1991 Nissan Sentra
A-Premium®Part # APALR061
Alternator Rectifier Diode with Trio for 1991 Nissan Sentra
52 Reviews
$31.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1991 Nissan Sentra
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRNE
Note
【Note-1】 This item is a 12 Volt, 8–35 ampere diode with 103 mm OD, an M6×43 mm battery post, and an M5×31.6 mm mounting bolt.
【Note-2】 For 1996 Honda Passport & Isuzu Rodeo, this item only fits the model with Plug In from back of Alternator.
【Note-3】 For Honda & Isuzu, this item only fits the model with 70 Amp (optional).
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Alternator Rectifier Diode for 2000-2005 Dodge Stratus
A-Premium®Part # APALR108
Alternator Rectifier Diode for 2000-2005 Dodge Stratus
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Stratus: 2000 2001 2002 2003 2004 2005
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LLK3
Note
This item is a 24 Volt, 6-35A general diode with an M8×54 mm battery post.
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Alternator Rectifier Diode With Trio for 1990-1994 Plymouth Laser
A-Premium®Part # APALR098
Alternator Rectifier Diode With Trio for 1990-1994 Plymouth Laser
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Plymouth Laser: 1990 1991 1992 1993 1994
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LG29
Note
This item is a 12 Volt, 6–35A block/ampere diode with 75 mm mounting length.
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Alternator Rectifier Diode for 1998-2001 Dodge Intrepid
A-Premium®Part # APALR048
Alternator Rectifier Diode for 1998-2001 Dodge Intrepid
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Intrepid: 1998 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCRK
Note
【Note-1】 This item is a 12 Volt, 8-35A General diode with 100 mm OD and an M6×44.5 mm battery post.
【Note-2】 This item comes without trio and capacitor.
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Alternator Rectifier Diode for 1999-2000 Plymouth Prowler
A-Premium®Part # APALR048
Alternator Rectifier Diode for 1999-2000 Plymouth Prowler
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Plymouth Prowler: 1999 2000
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7LV
Note
【Note-1】 This item is a 12 Volt, 8-35A General diode with 100 mm OD and an M6×44.5 mm battery post.
【Note-2】 This item comes without trio and capacitor.
Show less
Alternator Rectifier Diode with Trio for 1990-1993 Nissan D21
A-Premium®Part # APALR114
Alternator Rectifier Diode with Trio for 1990-1993 Nissan D21
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan D21: 1990 1991 1992 1993
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L78C
Note
This item is a 12 Volt, 6–35A general diode with 103 mm OD, an M6×43 mm battery post, and an M5×31.6 mm mounting bolt.
Show less
Alternator Rectifier Diode for 1993-1994 Nissan Altima
A-Premium®Part # APALR064
Alternator Rectifier Diode for 1993-1994 Nissan Altima
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Altima: 1993 1994
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCT1
Note
【Note-1】 This item is a 12 Volt, 6-35 ampere diode with 103 mm OD, an M5×16.6 mm battery post and an M5×31.6 mm mounting bolt.
【Note-2】 This item comes without trio.
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Alternator Rectifier Diode for 1995-2002 Volkswagen Cabrio
A-Premium®Part # APALR017
Alternator Rectifier Diode for 1995-2002 Volkswagen Cabrio
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Cabrio: 1995 1996 1997 1998 1999 2000 2001 2002
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Quantity1
Item LocatedUnited States
ConditionNew
item #10188990
Note
14 Volt, Diodes: 6-50A Avalanche, Diameter OD: 112mm, With M8x30mm Battery Post, With Triot.
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Alternator Rectifier Diode for 1993-1995 Volkswagen Corrado
A-Premium®Part # APALR017
Alternator Rectifier Diode for 1993-1995 Volkswagen Corrado
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Corrado: 1993 1994 1995
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101887RH
Note
14 Volt, Diodes: 6-50A Avalanche, Diameter OD: 112mm, With M8x30mm Battery Post, With Triot.
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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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