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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 1990-1993 Dodge D250Alternator Rectifier Diode for 1990-1993 Dodge D250
A-Premium®Part # APALR128
Alternator Rectifier Diode for 1990-1993 Dodge D250
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VRH4
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Ampere Diodes, M6×44mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
【Note-3】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2014 Scion xD
A-Premium®Part # APALR011
Alternator Rectifier Diode with Aluminum Heat Sinks for 2008-2014 Scion xD
52 Reviews
$34.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Scion xD: 2008 2009 2010 2011 2012 2013 2014
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015252E
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes With Aluminum Heat sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2003-2004 Acura MDX
A-Premium®Part # APALR126
Alternator Rectifier Diode with Aluminum Heat Sinks for 2003-2004 Acura MDX
52 Reviews
$37.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Acura MDX: 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L78G
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×40 mm battery post.
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Alternator Rectifier Diode for 1985-1999 Toyota 4Runner
A-Premium®Part # APALR003
Alternator Rectifier Diode for 1985-1999 Toyota 4Runner
52 Reviews
$55.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota 4Runner: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #101524Q8
Note
12 Volt, 100mm OD, 8-50A Avalanche Diodes.
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Alternator Rectifier Diode for 1995-1998 Dodge B3500
A-Premium®Part # APALR128
Alternator Rectifier Diode for 1995-1998 Dodge B3500
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B3500: 1995 1996 1997 1998
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1016VLYK
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Ampere Diodes, M6×44mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
【Note-3】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2009-2012 Toyota Venza
A-Premium®Part # APALR011
Alternator Rectifier Diode with Aluminum Heat Sinks for 2009-2012 Toyota Venza
52 Reviews
$34.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Venza: 2009 2010 2011 2012
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101524XD
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes With Aluminum Heat sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2002-2010 Lexus SC430
A-Premium®Part # APALR126
Alternator Rectifier Diode with Aluminum Heat Sinks for 2002-2010 Lexus SC430
52 Reviews
$37.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Lexus SC430: 2002 2003 2004 2005 2006 2007 2008 2009 2010
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7AU
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×40 mm battery post.
Show less
Alternator Rectifier Diode for 1992-1995 Honda Civic
A-Premium®Part # APALR003
Alternator Rectifier Diode for 1992-1995 Honda Civic
52 Reviews
$55.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Honda Civic: 1992 1993 1994 1995
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015253C
Note
12 Volt, 100mm OD, 8-50A Avalanche Diodes.
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Alternator Rectifier Diode for 1988-1989 Dodge Lancer
A-Premium®Part # APALR128
Alternator Rectifier Diode for 1988-1989 Dodge Lancer
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1016VLDP
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Ampere Diodes, M6×44mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
【Note-3】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2006 Lexus ES330
A-Premium®Part # APALR011
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2006 Lexus ES330
52 Reviews
$34.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Lexus ES330: 2004 2005 2006
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015215Z
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes With Aluminum Heat sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006 Jeep Commander
A-Premium®Part # APALR126
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006 Jeep Commander
52 Reviews
$37.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2006 Jeep Commander
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCYY
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×40 mm battery post.
Show less
Alternator Rectifier Diode for 1988-1991 Honda Prelude
A-Premium®Part # APALR003
Alternator Rectifier Diode for 1988-1991 Honda Prelude
52 Reviews
$55.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Honda Prelude: 1988 1989 1990 1991
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10152667
Note
12 Volt, 100mm OD, 8-50A Avalanche Diodes.
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Alternator Rectifier Diode for 1990-1993 Dodge D150
A-Premium®Part # APALR128
Alternator Rectifier Diode for 1990-1993 Dodge D150
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1016VRWH
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Ampere Diodes, M6×44mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
【Note-3】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2012 Toyota RAV4
A-Premium®Part # APALR011
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2012 Toyota RAV4
52 Reviews
$34.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota RAV4: 2004 2005 2006 2007 2008 2009 2010 2011 2012
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101522LZ
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes With Aluminum Heat sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2002-2006 Jeep Liberty
A-Premium®Part # APALR126
Alternator Rectifier Diode with Aluminum Heat Sinks for 2002-2006 Jeep Liberty
52 Reviews
$37.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep Liberty: 2002 2003 2004 2005 2006
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD45
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×40 mm battery post.
Show less
Alternator Rectifier Diode with Heat Sinks for 2007 GMC Sierra 1500 HD Classic
A-Premium®Part # APALR085
Alternator Rectifier Diode with Heat Sinks for 2007 GMC Sierra 1500 HD Classic
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2007 GMC Sierra 1500 HD Classic
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L700
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×50 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode for 1998-2000 Dodge Ram 2500 Van
A-Premium®Part # APALR128
Alternator Rectifier Diode for 1998-2000 Dodge Ram 2500 Van
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 2500 Van: 1998 1999 2000
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1016VN74
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Ampere Diodes, M6×44mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
【Note-3】 This item comes with Aluminum Heat Sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2009 Lexus RX350
A-Premium®Part # APALR011
Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2009 Lexus RX350
52 Reviews
$34.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Lexus RX350: 2007 2008 2009
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015260E
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×33mm Battery Post.;
【Note-2】 This item comes With Aluminum Heat sinks.
Show less
Alternator Rectifier Diode with Aluminum Heat Sinks for 2011-2012 Ram 1500
A-Premium®Part # APALR126
Alternator Rectifier Diode with Aluminum Heat Sinks for 2011-2012 Ram 1500
52 Reviews
$37.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ram 1500: 2011 2012
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LA7Y
Note
This item is a 12 Volt, 12–50A press-fit/avalanche diode with 117 mm OD and an M8×40 mm battery post.
Show less
Alternator Rectifier Diode with Heat Sinks for 2005-2008 Pontiac Grand Prix
A-Premium®Part # APALR085
Alternator Rectifier Diode with Heat Sinks for 2005-2008 Pontiac Grand Prix
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Grand Prix: 2005 2006 2007 2008
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCRS
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×50 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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.

Related Categories

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Alternator Voltage Regulator
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