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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 1983-1986 Pontiac T1000Alternator Rectifier Diode for 1983-1986 Pontiac T1000
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Pontiac T1000
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac T1000: 1983 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8E6
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 Buick Somerset Regal
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985 Buick Somerset Regal
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Buick Somerset Regal
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L84W
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 Trio for 1989-1991 GMC Tracker
A-Premium®Part # APALR121
Alternator Rectifier Diode With Trio for 1989-1991 GMC Tracker
52 Reviews
$30.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC Tracker: 1989 1990 1991
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LED8
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 with Aluminum Heat Sinks for 1994 Chevrolet S10 Blazer
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Chevrolet S10 Blazer
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 Chevrolet S10 Blazer
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8Y9
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 for 1988-1992 Isuzu Pickup
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1988-1992 Isuzu Pickup
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Isuzu Pickup: 1988 1989 1990 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6VY
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 1989-1990 Nissan 240SX
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1989-1990 Nissan 240SX
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan 240SX: 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L75K
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 with Trio for 1984-1985 Mazda RX-7
A-Premium®Part # APALR051
Alternator Rectifier Diode with Trio for 1984-1985 Mazda RX-7
52 Reviews
$28.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda RX-7: 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQVU
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 1997-2001 Mazda Protege
A-Premium®Part # APALR166
Alternator Rectifier Diode for 1997-2001 Mazda Protege
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda Protege: 1997 1998 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6QW
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 1982-1985 Cadillac Cimarron
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1982-1985 Cadillac Cimarron
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 #1015LDPK
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1972 1975-1980 Buick Skylark
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1972 1975-1980 Buick Skylark
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 #1015LDLW
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1976 Cadillac Calais
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1976 Cadillac Calais
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 #1015LK1W
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1985 Cadillac DeVille
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1985 Cadillac DeVille
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 #1015LDXT
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1972 Buick GS 455
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1972 Buick GS 455
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 #1015LHNC
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode for 1971-1980 Buick Riviera
A-Premium®Part # APALR044
Alternator Rectifier Diode for 1971-1980 Buick Riviera
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 #1015LG0K
Note
This item is a 12V/24V, 6–25A button diode with 102 mm OD.
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Alternator Rectifier Diode with Trio for 1981-1985 Volkswagen Jetta
A-Premium®Part # APALR134
Alternator Rectifier Diode with Trio for 1981-1985 Volkswagen Jetta
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Jetta: 1981 1982 1983 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQ3L
Note
This item is a 14 Volt, 6-35A diode with 114 mm OD and trio.
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Alternator Rectifier Diode with Trio for 1985 Volkswagen Cabriolet
A-Premium®Part # APALR134
Alternator Rectifier Diode with Trio for 1985 Volkswagen Cabriolet
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Volkswagen Cabriolet
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HRUQ
Note
This item is a 14 Volt, 6-35A diode with 114 mm OD and trio.
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Alternator Rectifier Diode with Trio for 1981-1984 Volkswagen Rabbit
A-Premium®Part # APALR134
Alternator Rectifier Diode with Trio for 1981-1984 Volkswagen Rabbit
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Rabbit: 1981 1982 1983 1984
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HKW3
Note
This item is a 14 Volt, 6-35A diode with 114 mm OD and trio.
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Alternator Rectifier for 1989-1990 1992 Plymouth Colt
A-Premium®Part # APALR025
Alternator Rectifier for 1989-1990 1992 Plymouth Colt
52 Reviews
$36.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Plymouth Colt: 1989 1990 1992
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Quantity1
Item LocatedUnited States
Part interchange
A860T35270, E9PZ10304B, 135252, RM-41, IMR10040
ConditionNew
item #1013GQ7P
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Alternator Rectifier Diode for 1996-1999 Buick LeSabre
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1996-1999 Buick LeSabre
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Buick LeSabre: 1996 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #10152697
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
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Alternator Rectifier Diode for 1991-1997 Cadillac Seville
A-Premium®Part # APALR043
Alternator Rectifier Diode for 1991-1997 Cadillac Seville
52 Reviews
$32.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Cadillac Seville: 1991 1992 1993 1994 1995 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015243L
Note
12 Volt, 118mm OD, Diodes: 6-50A Jumbo Avalanche Button.
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Page 44 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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