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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 1985-1986 Pontiac Grand AmAlternator Rectifier Diode for 1985-1986 Pontiac Grand Am
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1986 Pontiac Grand Am
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Grand Am: 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCH0
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 1989-2001 Suzuki Swift
A-Premium®Part # APALR121
Alternator Rectifier Diode With Trio for 1989-2001 Suzuki Swift
52 Reviews
$30.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Suzuki Swift: 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LH1E
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 Diode with Negative Heat Sinks for 2002-2006 Freightliner Sprinter 3500
A-Premium®Part # APALR151
Alternator Rectifier Diode with Negative Heat Sinks for 2002-2006 Freightliner Sprinter 3500
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Sprinter 3500: 2002 2003 2004 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8RQ
Note
【Note-1】 This item is a 14 Volt, 6–60A press-fit/ampere diode with 129 mm OD, an M8×22 mm battery post (L), and an M8×32 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
【Note-3】 This item fits the model with 120-150 Amp.
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Alternator Rectifier Diode with Trio for 1979-1980 Volkswagen Dasher
A-Premium®Part # APALR134
Alternator Rectifier Diode with Trio for 1979-1980 Volkswagen Dasher
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Dasher: 1979 1980
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL03
Note
This item is a 14 Volt, 6-35A diode with 114 mm OD and trio.
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Alternator Rectifier Diode for 1983-1986 Chevrolet C70
A-Premium®Part # APALR173
Alternator Rectifier Diode for 1983-1986 Chevrolet C70
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C70: 1983 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LDXA
Note
This item is a 12 Volt, 6–25A diode with 80 mm OD.
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Alternator Rectifier Diode for 1984-1985 Chevrolet Citation II
A-Premium®Part # APALR173
Alternator Rectifier Diode for 1984-1985 Chevrolet Citation II
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Citation II: 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LGU9
Note
This item is a 12 Volt, 6–25A diode with 80 mm OD.
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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
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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 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 Heat Sink for 2004-2005 BMW 530i
A-Premium®Part # APALR154
Alternator Rectifier Diode with Heat Sink for 2004-2005 BMW 530i
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 530i: 2004 2005
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VRW7
Note
【Note-1】 12 Volt, 129mm OD, 6-50A Press-fit/Avalanche, With 129 mm Negative Heat Sink, With M8×26mm Battery Post(L), With M8×34.5mm Battery Post(R).
【Note-2】 This item comes without Airduct.
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Alternator 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
Check if this fits your vehicle
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 Capacitor for 1996-1997 Mitsubishi Eclipse
A-Premium®Part # APALR067
Alternator Rectifier Diode with Trio Capacitor for 1996-1997 Mitsubishi Eclipse
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Eclipse: 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL8W
Note
【Note-1】 For Eagle Talon 1995 & 1997, this item fits the model with naturally aspirated engine only, does not fit the Turbocharged model.
【Note-2】 For Eagle Talon 1996 & 1998, this item fits the model with Turbocharged engine, does not fit the naturally aspirated model.
【Note-3】 For 1996-1997 Mitsubishi Eclipse, this item fits the model with automatic transmission, does not fit the model with manual transmission.
【Note-4】 This item is a 12 Volt, 6–35 ampere diode with 100 mm mounting length, an M8×54 mm battery post, and trio/capacitor.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Chevrolet Blazer
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Chevrolet Blazer
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 Chevrolet Blazer
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC9T
Note
【Note-1】 This item is a 12 Volt, 6–35A avalanche press-fit diode with 102 mm OD and an M8×46 mm battery post.
【Note-2】 For GMC Safari, this item only fits the model with 100 or 105 Amp Alternator.
【Note-3】 For Lumina & Monte Carlo & Pontiac, this item only fits the model with 105 Amp Alternator.
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Alternator Rectifier Diode for 1990-1992 Nissan Axxess
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1990-1992 Nissan Axxess
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Axxess: 1990 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8RT
Note
【Note-1】 This item is a 12 Volt, 8–50A diode with 100 mm OD, an M6×44.4 mm battery post, and trio.
【Note-2】 This item comes with (M5+M4)×39.8 mm mounting bolt.
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Alternator Rectifier Diode for 1985-1987 Oldsmobile Calais
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1985-1987 Oldsmobile Calais
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Calais: 1985 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC90
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 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 for 1983 1986-1988 Jeep J10
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983 1986-1988 Jeep J10
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep J10: 1983 1986 1987 1988
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6XH
Note
【Note-1】 This item is a 12 Volt, 6–50A button diode with 80 mm OD.
【Note-2】 For 1983-1988 Oldsmobile Delta 88, this item fits for the Sedan model only, does not fit for the Coupe model.
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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