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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 Trio for 1985-1989 Merkur XR4TiAlternator Rectifier Diode with Trio for 1985-1989 Merkur XR4Ti
A-Premium®Part # APALR053
Alternator Rectifier Diode with Trio for 1985-1989 Merkur XR4Ti
52 Reviews
$30.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Merkur XR4Ti: 1985 1986 1987 1988 1989
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183WVS
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 for 2009-2013 Honda Fit
A-Premium®Part # APALR132
Alternator Rectifier Diode for 2009-2013 Honda Fit
52 Reviews
$38.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Honda Fit: 2009 2010 2011 2012 2013
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183YAZ
Note
12 Volt, 115mm OD, 12-35A Diodes, M6×60mm Battery Post
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Alternator Rectifier Diode with Trio for 1985-1986 Dodge Colt
A-Premium®Part # APALR051
Alternator Rectifier Diode with Trio for 1985-1986 Dodge Colt
52 Reviews
$28.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Colt: 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLGC
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 for 1997 Kia Sephia
A-Premium®Part # APALR166
Alternator Rectifier Diode for 1997 Kia Sephia
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1997 Kia Sephia
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LC0Y
Note
This item is a 12 Volt, 6–35A block/ampere diode with 106 mm OD and an M8×54 mm battery post.
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Alternator Rectifier Diode for 1971-1972 Buick Sportwagon
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1972 Buick Sportwagon
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 #1015LG2Z
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1975-1985 Cadillac Commercial Chassis
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1975-1985 Cadillac Commercial Chassis
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 #1015LLH0
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode with Insulator for 2001-2002 Sterling Truck Acterra 5500
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 2001-2002 Sterling Truck Acterra 5500
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck Acterra 5500: 2001 2002
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCLN
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 2001-2003 Sterling Truck Acterra 7500
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 2001-2003 Sterling Truck Acterra 7500
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck Acterra 7500: 2001 2002 2003
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8WY
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 1999-2004 Sterling Truck A9500
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2004 Sterling Truck A9500
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck A9500: 1999 2000 2001 2002 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L86E
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 1999-2008 Freightliner Century Class
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2008 Freightliner Century Class
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Century Class: 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9XS
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 1999-2000 Sterling Truck AT9522
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2000 Sterling Truck AT9522
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck AT9522: 1999 2000
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD5A
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 1998-2005 Freightliner FL70
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1998-2005 Freightliner FL70
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner FL70: 1998 1999 2000 2001 2002 2003 2004 2005
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7TQ
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 1985-1987 Chevrolet Chevette
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1987 Chevrolet Chevette
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Chevette: 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6WP
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 1985-1986 Oldsmobile Calais
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1986 Oldsmobile Calais
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Calais: 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAZ9
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 Monte Carlo
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1987 Chevrolet Monte Carlo
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Monte Carlo: 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LA0T
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 Cadillac Eldorado
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985 Cadillac Eldorado
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Cadillac Eldorado
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LATH
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 Regal
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Buick Regal
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick Regal: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L910
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 Cimarron
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985 Cadillac Cimarron
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Cadillac Cimarron
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7N0
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 Capacitor for 1993-1997 Mazda MX-6
A-Premium®Part # APALR067
Alternator Rectifier Diode with Trio Capacitor for 1993-1997 Mazda MX-6
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda MX-6: 1993 1994 1995 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRYX
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 Heat Sinks for 2007-2013 Toyota Highlander
A-Premium®Part # APALR160
Alternator Rectifier Diode with Heat Sinks for 2007-2013 Toyota Highlander
52 Reviews
$41.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Highlander: 2007 2008 2009 2010 2011 2012 2013
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L7YC
Note
This item is a 12 Volt, 12–50A avalanche diode with 117 mm OD and an M6×33 mm battery post.
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Page 48 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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