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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 2006-2007 Mercedes-Benz C280Alternator Rectifier Diode with Heat Sinks for 2006-2007 Mercedes-Benz C280
A-Premium®Part # APALR086
Alternator Rectifier Diode with Heat Sinks for 2006-2007 Mercedes-Benz C280
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz C280: 2006 2007
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD3X
Note
This item is a 12 Volt, 6-50A press-fit/avalanche diode with 129 mm OD, an M8×35 mm battery post (L) and an M8×22 mm battery post (R).
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Alternator Rectifier Diode with Heat Sinks for 2005-2009 Mercedes-Benz SLK350
A-Premium®Part # APALR086
Alternator Rectifier Diode with Heat Sinks for 2005-2009 Mercedes-Benz SLK350
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz SLK350: 2005 2006 2007 2008 2009
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L959
Note
This item is a 12 Volt, 6-50A press-fit/avalanche diode with 129 mm OD, an M8×35 mm battery post (L) and an M8×22 mm battery post (R).
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Alternator Rectifier Diode for 1986 Buick LeSabre
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1986 Buick LeSabre
52 Reviews
$31.99
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2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL4Y
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 1986-1990 Cadillac Seville
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1986-1990 Cadillac Seville
52 Reviews
$31.99
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2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPXE
Note
This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.
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Alternator Rectifier Diode for 1991-1995 GMC C3500
A-Premium®Part # APALR070
Alternator Rectifier Diode for 1991-1995 GMC C3500
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC C3500: 1991 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRA3
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 1987-1989 Mitsubishi Precis
A-Premium®Part # APALR096
Alternator Rectifier Diode with Trio for 1987-1989 Mitsubishi Precis
52 Reviews
$28.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Precis: 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LDRK
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 1998-1999 Saturn SW1
A-Premium®Part # APALR058
Alternator Rectifier Diode for 1998-1999 Saturn SW1
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Saturn SW1: 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR4D
Note
This item is a 12 Volt, 6-50A avalanche diode with 100 mm OD.
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Alternator Rectifier Diode for 2004-2008 Suzuki Swift+
A-Premium®Part # APALR142
Alternator Rectifier Diode for 2004-2008 Suzuki Swift+
52 Reviews
$27.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Suzuki Swift+: 2004 2005 2006 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAAE
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 114.1 mm OD and an M8×47.5 mm battery post, without trio.
【Note-2】 This item fits the model with 3 pin voltage regulator.
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Alternator Rectifier Diode for 1983-1989 Cadillac Fleetwood
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1989 Cadillac Fleetwood
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac Fleetwood: 1983 1984 1985 1986 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCQX
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 with Aluminum Heat Sinks for 1987-1994 Chevrolet Cavalier
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1994 Chevrolet Cavalier
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Cavalier: 1987 1988 1989 1990 1991 1992 1993 1994
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQ4Q
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1988 Oldsmobile Firenza
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1988 Oldsmobile Firenza
52 Reviews
$23.99
Low stock: Only 4 left
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2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPPT
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode for 1969-1970 Pontiac Strato-Chief
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1969-1970 Pontiac Strato-Chief
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VPRU
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode for 1969-1970 1973-1988 Pontiac Firebird
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1969-1970 1973-1988 Pontiac Firebird
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Firebird: 1969 1970 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VP8S
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode for 1981-1985 Jeep Scrambler
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1981-1985 Jeep Scrambler
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep Scrambler: 1981 1982 1983 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VRXD
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode with Trio for 1995-2006 Nissan Tsuru
A-Premium®Part # APALR036
Alternator Rectifier Diode with Trio for 1995-2006 Nissan Tsuru
52 Reviews
$39.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Tsuru: 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #10154Q2Q
Note
Alternator Rectifier -- 12 Volt, 8-35 Ampere Diodes, M6×49.5mm Battery Post.
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Alternator Rectifier Diode with Heat Sinks for 2007-2008 Dodge Sprinter 2500
A-Premium®Part # APALR153
Alternator Rectifier Diode with Heat Sinks for 2007-2008 Dodge Sprinter 2500
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Sprinter 2500: 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLE5
Note
This item is a 12 Volt, 6–50A avalanche diode with 129 mm OD, an M8×34.5 mm battery post (L), and an M8×22 mm battery post (R).
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Alternator Rectifier Diode with Insulator for 1999-2001 Freightliner FC80
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2001 Freightliner FC80
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner FC80: 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9W4
Note
This item is a 12 Volt, 6–50A press-fit/avalanche diode with 116 mm OD and a 5/16''×45 mm battery post.
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Alternator Rectifier Diode for 1985-1986 Oldsmobile Cutlass Salon
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1986 Oldsmobile Cutlass Salon
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass Salon: 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L896
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 1985-1987 Chevrolet Celebrity
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1987 Chevrolet Celebrity
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Celebrity: 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD5W
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 Pontiac J2000 Sunbird
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1984 Pontiac J2000 Sunbird
52 Reviews
$20.99
Low stock: Only 3 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 #1015LAUL
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.
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

Alternator Voltage Regulator
Alternator Voltage Regulator
Alternator
Alternator
Fuel Pump
Fuel Pump
Water Pump
Water Pump