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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 Aluminum Heat Sinks 8-50A for 1997-1999 Toyota 4RunnerAlternator Rectifier Diode with Aluminum Heat Sinks 8-50A for 1997-1999 Toyota 4Runner
A-Premium®Part # APALR008
Alternator Rectifier Diode with Aluminum Heat Sinks 8-50A for 1997-1999 Toyota 4Runner
52 Reviews
$58.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota 4Runner: 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #10152414
Note
【Note-1】 14 Volt, 117mm OD, 8-50 A Diodes, M6 Battery Post (31°).
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 GMC Yukon
A-Premium®Part # APALR155
Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 GMC Yukon
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC Yukon: 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HN0C
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 M6×51 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode for 2006-2012 Mitsubishi Eclipse
A-Premium®Part # APALR047
Alternator Rectifier Diode for 2006-2012 Mitsubishi Eclipse
52 Reviews
$28.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Eclipse: 2006 2007 2008 2009 2010 2011 2012
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLX7
Note
This item is a 12 Volt, 6–30A avalanche diode with an M5×44 mm battery post.
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Alternator Rectifier Diode for 1994-1995 BMW 840Ci
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1994-1995 BMW 840Ci
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 840Ci: 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR8N
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 for 1996-1999 BMW 328i
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1996-1999 BMW 328i
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 328i: 1996 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNAN
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 for 1978 Toyota Cressida
A-Premium®Part # APALR137
Alternator Rectifier Diode for 1978 Toyota Cressida
52 Reviews
$28.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1978 Toyota Cressida
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLAY
Note
This item is a 12 Volt, 8–35A diode with 87 mm OD and an M6 battery post (33°).
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Alternator Rectifier Diode for 1976-1982 Toyota Corolla
A-Premium®Part # APALR137
Alternator Rectifier Diode for 1976-1982 Toyota Corolla
52 Reviews
$28.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Corolla: 1976 1977 1978 1979 1980 1981 1982
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HKTX
Note
This item is a 12 Volt, 8–35A diode with 87 mm OD and an M6 battery post (33°).
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2006 Dodge Durango
A-Premium®Part # APALR055
Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2006 Dodge Durango
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Durango: 2004 2005 2006
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLWC
Note
【Note-1】 This item is a 12 Volt, 7–50A avalanche press-fit diode with 117 mm OD and an M8×40 mm battery post.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode for 2007 2009 Hyundai Sonata
A-Premium®Part # APALR143
Alternator Rectifier Diode for 2007 2009 Hyundai Sonata
52 Reviews
$27.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Hyundai Sonata: 2007 2009
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC05
Note
This item is a 12 Volt, 8-50A press-fit diode with 113 mm OD and an M6 battery post (36°).
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Alternator Rectifier Diode for 1987-1993 Volkswagen Fox
A-Premium®Part # APALR170
Alternator Rectifier Diode for 1987-1993 Volkswagen Fox
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Fox: 1987 1988 1989 1990 1991 1992 1993
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAHZ
Note
This item is a 12 Volt, 6–35A diode with 114 mm OD, an M8×52.5 mm battery post, an M5×43.7 mm trio post, and trio.
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Alternator Rectifier Diode with Trio for 1994-1996 Mercedes-Benz C220
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1994-1996 Mercedes-Benz C220
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz C220: 1994 1995 1996
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRG1
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
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Alternator Rectifier Diode with Trio for 1992-1994 Audi 100 Quattro
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1992-1994 Audi 100 Quattro
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Audi 100 Quattro: 1992 1993 1994
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR3V
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
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Alternator Rectifier Diode with Trio for 1993-1995 Audi 90 Quattro
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1993-1995 Audi 90 Quattro
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Audi 90 Quattro: 1993 1994 1995
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL8N
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
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Alternator Rectifier Diode with Trio for 1994-1999 BMW 318i
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1994-1999 BMW 318i
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 318i: 1994 1995 1996 1997 1998 1999
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HP4A
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
Show less
Alternator Rectifier Diode for 2004 Nissan Pathfinder
A-Premium®Part # APALR001
Alternator Rectifier Diode for 2004 Nissan Pathfinder
52 Reviews
$32.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2004 Nissan Pathfinder
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRHZ
Note
【Note-1】 This item is a 12 Volt 6-35A avalanche diode with 100 mm OD and an M8×59.5 mm battery post.
【Note-2】 This item comes without trio and capacitor.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge B300
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge B300
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B300: 1975 1976 1977 1978 1979 1980
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184TPV
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 1975-1980 Dodge B100
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge B100
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B100: 1975 1976 1977 1978 1979 1980
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184U9X
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode for 1975-1979 1986-1989 Ford F-250
A-Premium®Part # APALR068
Alternator Rectifier Diode for 1975-1979 1986-1989 Ford F-250
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford F-250: 1975 1976 1977 1978 1979 1986 1987 1988 1989
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
Part interchange
GY-1026, D2OZ10304A, 131422, RF-09H, FR1270, D20Z10304A, GY1026A, D13
ConditionNew
item #1018SNT3
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Alternator Rectifier Diode for 1975-1979 1986-1989 Ford E-150 Econoline
A-Premium®Part # APALR068
Alternator Rectifier Diode for 1975-1979 1986-1989 Ford E-150 Econoline
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford E-150 Econoline: 1975 1976 1977 1978 1979 1986 1987 1988 1989
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
Part interchange
GY-1026, D2OZ10304A, 131422, RF-09H, FR1270, D20Z10304A, GY1026A, D13
ConditionNew
item #1018SSTD
Show less
Alternator Rectifier Diode for 1994-1995 Mitsubishi Galant
A-Premium®Part # APALR027
Alternator Rectifier Diode for 1994-1995 Mitsubishi Galant
52 Reviews
$28.99
Low stock: Only 5 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 #10188030
Note
【Note-1】 14 Volt; 122mm OD; 8-35A Block/Ampere Diodes; M8x54mm Battery Post.
【Note-2】 This item comes with Trio/Capacitor.
Show less
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Page 24 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

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Alternator Voltage Regulator
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