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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 1983-1988 Oldsmobile 98Alternator Rectifier Diode for 1983-1988 Oldsmobile 98
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1988 Oldsmobile 98
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile 98: 1983 1984 1985 1986 1987 1988
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7RZ
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 1983-1988 Oldsmobile Cutlass Ciera
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1988 Oldsmobile Cutlass Ciera
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass Ciera: 1983 1984 1985 1986 1987 1988
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L710
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 1983-1984 Oldsmobile Omega
A-Premium®Part # APALR176
Alternator Rectifier Diode for 1983-1984 Oldsmobile Omega
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 #1015L9CT
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 1987-1989 Ford Ranger
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1987-1989 Ford Ranger
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford Ranger: 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L94G
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 with Heat Sinks for 1986 Mercury Topaz
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1986 Mercury Topaz
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 Mercury Topaz
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC5C
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 with Heat Sinks for 1988 Ford F-Super Duty
A-Premium®Part # APALR169
Alternator Rectifier Diode with Heat Sinks for 1988 Ford F-Super Duty
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1988 Ford F-Super Duty
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8T0
Note
This item is a 12V, 6–35A general diode with 119 mm OD and aluminum heat sinks.
Show less
Alternator Rectifier Diode with Trio for 1987 Mercury Tracer
A-Premium®Part # APALR051
Alternator Rectifier Diode with Trio for 1987 Mercury Tracer
52 Reviews
$28.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1987 Mercury Tracer
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNEC
Note
This item is a 12 Volt, 6–35A general diode with an M5×49 mm battery post and trio.
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Alternator Rectifier Diode With Trio for 1989-1991 1998 Chevrolet Tracker
A-Premium®Part # APALR121
Alternator Rectifier Diode With Trio for 1989-1991 1998 Chevrolet Tracker
52 Reviews
$30.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Tracker: 1989 1990 1991 1998
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LEC2
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 for 1976-1985 Cadillac Seville
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1976-1985 Cadillac Seville
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 #1015LDAP
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1973-1980 Buick Century
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1980 Buick Century
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 #1015LDWV
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1973-1975 Buick Apollo
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1973-1975 Buick Apollo
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 #1015LDWC
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode with Heat Sinks for 2006 Mercedes-Benz R350
A-Premium®Part # APALR153
Alternator Rectifier Diode with Heat Sinks for 2006 Mercedes-Benz R350
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2006 Mercedes-Benz R350
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLRZ
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 1996-1997 1999 2001-2002 Kenworth K300
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1996-1997 1999 2001-2002 Kenworth K300
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Kenworth K300: 1996 1997 1999 2001 2002
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L84A
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 1996-2008 Kenworth T300
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1996-2008 Kenworth T300
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Kenworth T300: 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD3Y
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 1983-1986 Buick Skylark
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Skylark
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Skylark: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L933
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 Buick Century
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Century
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Century: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8G7
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 1985 Cadillac Fleetwood
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985 Cadillac Fleetwood
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Cadillac Fleetwood
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7YK
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 1986-1987 Chevrolet Camaro
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1986-1987 Chevrolet Camaro
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Camaro: 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC4K
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 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
Check if this fits your vehicle
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.
Show less
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
Check if this fits your vehicle
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.
Show less
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Page 36 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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