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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 1998-2002 Saturn SC2Alternator Rectifier Diode for 1998-2002 Saturn SC2
A-Premium®Part # APALR058
Alternator Rectifier Diode for 1998-2002 Saturn SC2
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Saturn SC2: 1998 1999 2000 2001 2002
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HN1P
Note
This item is a 12 Volt, 6-50A avalanche diode with 100 mm OD.
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Alternator Rectifier Diode for 1983 AMC Spirit
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983 AMC Spirit
52 Reviews
$19.99
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2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7GW
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 1985-1987 Oldsmobile Cutlass
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1985-1987 Oldsmobile Cutlass
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass: 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6R4
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 1986-1990 Jeep Grand Wagoneer
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1986-1990 Jeep Grand Wagoneer
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep Grand Wagoneer: 1986 1987 1988 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC7D
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 1983-1987 Buick Skyhawk
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1987 Buick Skyhawk
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skyhawk: 1983 1984 1985 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8W1
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
Alternator Rectifier Diode with Aluminum Heat Sinks for 1988-1995 Chevrolet C1500
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1988-1995 Chevrolet C1500
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C1500: 1988 1989 1990 1991 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRC5
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 1983-1984 1988 Oldsmobile Cutlass Calais
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1984 1988 Oldsmobile Cutlass Calais
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass Calais: 1983 1984 1988
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC4P
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
Alternator Rectifier Diode for 1983-1985 1987-1989 Cadillac Eldorado
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1985 1987-1989 Cadillac Eldorado
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac Eldorado: 1983 1984 1985 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LA21
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 Heat Sinks for 1986-1989 Ford F-250
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1986-1989 Ford F-250
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford F-250: 1986 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCN0
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
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Alternator Rectifier Diode for 1973-1978 Buick Regal
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1978 Buick Regal
52 Reviews
$33.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LHZ2
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1977-1979 Buick Opel
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1977-1979 Buick Opel
52 Reviews
$33.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LGER
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1973 Buick Centurion
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1973 Buick Centurion
52 Reviews
$33.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LE6E
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
Show less
Alternator Rectifier Diode for 1983-1986 Chevrolet C30
A-Premium®Part # APALR173
Alternator Rectifier Diode for 1983-1986 Chevrolet C30
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C30: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LDK4
Note
This item is a 12 Volt, 6–25A diode with 80 mm OD.
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Alternator Rectifier Diode for 1986 Chevrolet C10
A-Premium®Part # APALR173
Alternator Rectifier Diode for 1986 Chevrolet C10
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Chevrolet C10
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LK9S
Note
This item is a 12 Volt, 6–25A diode with 80 mm OD.
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Alternator Rectifier Diode with Heat Sinks for 2007-2008 Dodge Sprinter 3500
A-Premium®Part # APALR153
Alternator Rectifier Diode with Heat Sinks for 2007-2008 Dodge Sprinter 3500
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Sprinter 3500: 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPA8
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 2001-2008 Freightliner Classic
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 2001-2008 Freightliner Classic
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Classic: 2001 2002 2003 2004 2005 2006 2007 2008
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD4N
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 with Insulator for 1998-2004 Freightliner FL80
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1998-2004 Freightliner FL80
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner FL80: 1998 1999 2000 2001 2002 2003 2004
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9CH
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.
Show less
Alternator Rectifier Diode with Insulator for 1998-2004 Freightliner FL60
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1998-2004 Freightliner FL60
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner FL60: 1998 1999 2000 2001 2002 2003 2004
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCC2
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.
Show less
Alternator Rectifier Diode for 1984-1986 Pontiac Fiero
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1984-1986 Pontiac Fiero
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Fiero: 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAGL
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
Alternator Rectifier Diode for 1983-1986 Pontiac Acadian
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Pontiac Acadian
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Acadian: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LA85
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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Page 31 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.

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