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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 1984 Oldsmobile Cutlass CalaisAlternator Rectifier Diode for 1984 Oldsmobile Cutlass Calais
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1984 Oldsmobile Cutlass Calais
52 Reviews
$20.99
Low stock: Only 3 left
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2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9Y6
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 for 1984-1986 Oldsmobile Cutlass Ciera
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1984-1986 Oldsmobile Cutlass Ciera
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass Ciera: 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC5A
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 for 1986 Buick Somerset
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1986 Buick Somerset
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Buick Somerset
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8YL
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 for 1987 Chevrolet Corsica
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1987 Chevrolet Corsica
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1987 Chevrolet Corsica
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LARK
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 Aluminum Heat Sinks for 1994 Buick Park Avenue
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Buick Park Avenue
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 Buick Park Avenue
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAHP
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 with Negative Heat Sinks for 2002-2006 Freightliner Sprinter 2500
A-Premium®Part # APALR151
Alternator Rectifier Diode with Negative Heat Sinks for 2002-2006 Freightliner Sprinter 2500
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Sprinter 2500: 2002 2003 2004 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L83L
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 Negative Heat Sinks for 2003-2006 Dodge Sprinter 3500
A-Premium®Part # APALR151
Alternator Rectifier Diode with Negative Heat Sinks for 2003-2006 Dodge Sprinter 3500
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Sprinter 3500: 2003 2004 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCH1
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 for 1986-1990 Nissan Sentra
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1986-1990 Nissan Sentra
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Sentra: 1986 1987 1988 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L95Z
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 1998-1999 Chevrolet Lumina
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1998-1999 Chevrolet Lumina
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Lumina: 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #101521SL
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
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Alternator Rectifier Diode for 1996 Oldsmobile 98
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1996 Oldsmobile 98
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1996 Oldsmobile 98
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Quantity1
Item LocatedUnited States
ConditionNew
item #101525QZ
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2006 Pontiac Torrent
A-Premium®Part # APALR009
Alternator Rectifier Diode with Aluminum Heat Sinks for 2006 Pontiac Torrent
52 Reviews
$57.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2006 Pontiac Torrent
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015220A
Note
【Note-1】 12 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2005-2011 Cadillac STS
A-Premium®Part # APALR009
Alternator Rectifier Diode with Aluminum Heat Sinks for 2005-2011 Cadillac STS
52 Reviews
$57.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac STS: 2005 2006 2007 2008 2009 2010 2011
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Quantity1
Item LocatedUnited States
ConditionNew
item #101525AD
Note
【Note-1】 12 Volt, 117mm OD, 12-35A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode for 2001-2002 Nissan Pathfinder
A-Premium®Part # APALR028
Alternator Rectifier Diode for 2001-2002 Nissan Pathfinder
52 Reviews
$43.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Pathfinder: 2001 2002
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Quantity1
Item LocatedUnited States
ConditionNew
item #101523CK
Note
【Note-1】 24 Volt, 119mm OD, 8-50A Avalanche Diodes, M6×20.3mm Battery Post.
【Note-2】 This item comes with M5×31.6mm Mounting Bolt.
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Alternator Rectifier Diode with Trio for 1995 Chevrolet S10
A-Premium®Part # APALR032
Alternator Rectifier Diode with Trio for 1995 Chevrolet S10
52 Reviews
$34.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1995 Chevrolet S10
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Quantity1
Item LocatedUnited States
ConditionNew
item #101522EV
Note
14 Volt, 115mm OD, 8-50A Avalanche Diodes, with M6×52.5mm Battery Post, with Trio.
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Alternator Rectifier Diode with Trio for 1986 1989 Mitsubishi Montero
A-Premium®Part # APALR034
Alternator Rectifier Diode with Trio for 1986 1989 Mitsubishi Montero
52 Reviews
$28.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Montero: 1986 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #101525K1
Note
【Note-1】 95mm OD, 6-35A General Diodes.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode for 1994-1997 Cadillac DeVille
A-Premium®Part # APALR045
Alternator Rectifier Diode for 1994-1997 Cadillac DeVille
52 Reviews
$38.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac DeVille: 1994 1995 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #101526KX
Note
【Note-1】 12 Volt, 117.8mm OD, 6-50A Jumbo Avalanche Button, with Recessed Mounting Hole.
【Note-2】 For Cadillac DeVille 1997, fits the model with VIN 9.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2008 2010-2011 Honda CR-V
A-Premium®Part # APALR010
Alternator Rectifier Diode with Aluminum Heat Sinks for 2007-2008 2010-2011 Honda CR-V
52 Reviews
$45.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Honda CR-V: 2007 2008 2010 2011
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Quantity1
Item LocatedUnited States
ConditionNew
item #101524T3
Note
【Note-1】 12 Volt, 117mm OD, 6-50A Avalanche Diodes, M6×34.5mm Battery Post.;
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode for 2011-2018 Ram 3500
A-Premium®Part # APALR076
Alternator Rectifier Diode for 2011-2018 Ram 3500
52 Reviews
$43.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ram 3500: 2011 2012 2013 2014 2015 2016 2017 2018
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183YZA
Note
12 Volt, 128mm OD, 12-50 Avalanche Diodes, M8×59.5mm Battery Post.
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Alternator Rectifier Diode with Trio/Capacitor for 1991-1995 Mitsubishi 3000GT
A-Premium®Part # APALR122
Alternator Rectifier Diode with Trio/Capacitor for 1991-1995 Mitsubishi 3000GT
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi 3000GT: 1991 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #101840N6
Note
【Note-1】 12 Volt, 6-35A General Diodes, With M6×49.5mm Battery Post.
【Note-2】 It not fits the model with 90 Amp.
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Alternator Rectifier Diode for 1990-1991 Eagle Vista
A-Premium®Part # APALR144
Alternator Rectifier Diode for 1990-1991 Eagle Vista
52 Reviews
$26.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Eagle Vista: 1990 1991
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018419H
Note
【Note-1】 12 Volt, 96.7mm OD, 6-35A Diodes, M5×49mm Battery Post, with Trio.
【Note-2】 For Mitsubishi Mirage, this item fits the model to 4/1988.
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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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