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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 1991-1993 Nissan SentraAlternator Rectifier Diode with Trio for 1991-1993 Nissan Sentra
A-Premium®Part # APALR118
Alternator Rectifier Diode with Trio for 1991-1993 Nissan Sentra
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Sentra: 1991 1992 1993
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCSC
Note
This item is a 12 Volt, 6–35A diode with 103 mm OD and an M5×16.6 mm battery post.
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Alternator Rectifier Diode for 1994-1999 BMW M3
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1994-1999 BMW M3
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW M3: 1994 1995 1996 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL00
Note
This item is a 12 Volt, 12–50A diode with 122 mm OD, an M8×30 mm battery post, and trio.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 2003-2006 Dodge Ram 1500
A-Premium®Part # APALR055
Alternator Rectifier Diode with Aluminum Heat Sinks for 2003-2006 Dodge Ram 1500
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 1500: 2003 2004 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HLKQ
Note
【Note-1】 This item is a 12 Volt, 7–50A avalanche press-fit diode with 117 mm OD and an M8×40 mm battery post.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode for 1977-1987 Chevrolet P30
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1977-1987 Chevrolet P30
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet P30: 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #101521AC
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1982-1987 Chevrolet S10
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1982-1987 Chevrolet S10
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet S10: 1982 1983 1984 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #101523LS
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1987 Chevrolet R10
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1987 Chevrolet R10
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1987 Chevrolet R10
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Quantity1
Item LocatedUnited States
ConditionNew
item #101521EC
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1973-1979 Chevrolet Impala
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1973-1979 Chevrolet Impala
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
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Quantity1
Item LocatedUnited States
ConditionNew
item #101525P6
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1975 1979 1987 Chevrolet G10
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1975 1979 1987 Chevrolet G10
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet G10: 1975 1979 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101522XL
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1974 1976-1977 1985-1987 Chevrolet Monte Carlo
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1974 1976-1977 1985-1987 Chevrolet Monte Carlo
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Monte Carlo: 1974 1976 1977 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #101522ZW
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode with Trio for 1978-1981 Fiat Brava
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1978-1981 Fiat Brava
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Fiat Brava: 1978 1979 1980 1981
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Quantity1
Item LocatedUnited States
ConditionNew
item #101523DW
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Trio for 1974-1975 Opel Manta
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1974-1975 Opel Manta
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Opel Manta: 1974 1975
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101525D7
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Trio for 1977-1979 Alfa Romeo Sprint
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1977-1979 Alfa Romeo Sprint
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Alfa Romeo Sprint: 1977 1978 1979
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Quantity1
Item LocatedUnited States
ConditionNew
item #101524NU
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode for 1992-1993 Volkswagen Transporter
A-Premium®Part # APALR019
Alternator Rectifier Diode for 1992-1993 Volkswagen Transporter
52 Reviews
$35.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Transporter: 1992 1993
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183Z19
Note
【Note-1】 12 Volt, 112mm OD, 8-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B150
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1981-1987 Dodge B150
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B150: 1981 1982 1983 1984 1985 1986 1987
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184PV7
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1973 Chrysler Newport
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1973 Chrysler Newport
52 Reviews
$14.99
Low stock: Only 5 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 #10184T60
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
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Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1974 Dodge D100 Pickup
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1974 Dodge D100 Pickup
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge D100 Pickup: 1970 1971 1972 1973 1974
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10184PGR
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
Show less
Alternator Rectifier Diode for 1996-2004 Acura RL
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1996-2004 Acura RL
52 Reviews
$28.99
Low stock: Only 4 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 #101880TX
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
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Alternator Rectifier Diode for 2010-2011 Kia Borrego
A-Premium®Part # APALR005
Alternator Rectifier Diode for 2010-2011 Kia Borrego
52 Reviews
$28.99
Low stock: Only 4 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 #1018824X
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
Show less
Alternator Rectifier Diode for 1999-2001 Honda Odyssey
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1999-2001 Honda Odyssey
52 Reviews
$28.99
Low stock: Only 4 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 #1018808Y
Note
【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.
Show less
Alternator Rectifier Diode for 1998-1999 BMW 323i
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1998-1999 BMW 323i
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 323i: 1998 1999
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL98
Note
This item is a 12 Volt, 12–50A diode with 122 mm OD, an M8×30 mm battery post, and trio.
Show less
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Page 17 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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