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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 2007-2010 BMW 525iAlternator Rectifier Diode for 2007-2010 BMW 525i
A-Premium®Part # APALR164
Alternator Rectifier Diode for 2007-2010 BMW 525i
52 Reviews
$40.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 525i: 2007 2008 2009 2010
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9KU
Note
This item is a 12 Volt, 6-50A press-fit/avalanche diode with 114 mm OD and an M8×32 mm battery post.
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Alternator Rectifier Diode for 1988 Ford F-Super Duty
A-Premium®Part # APALR068
Alternator Rectifier Diode for 1988 Ford F-Super Duty
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1988 Ford F-Super Duty
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Quantity1
Item LocatedUnited States
Part interchange
GY-1026, D2OZ10304A, 131422, RF-09H, FR1270, D20Z10304A, GY1026A, D13
ConditionNew
item #1018SRDY
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Alternator Rectifier Diode for 1975-1979 1986-1989 Ford F-150
A-Premium®Part # APALR068
Alternator Rectifier Diode for 1975-1979 1986-1989 Ford F-150
52 Reviews
$30.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford F-150: 1975 1976 1977 1978 1979 1986 1987 1988 1989
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
Part interchange
GY-1026, D2OZ10304A, 131422, RF-09H, FR1270, D20Z10304A, GY1026A, D13
ConditionNew
item #1018SQ29
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Alternator Rectifier Diode for 1993-1998 Volkswagen Jetta
A-Premium®Part # APALR019
Alternator Rectifier Diode for 1993-1998 Volkswagen Jetta
52 Reviews
$35.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Jetta: 1993 1994 1995 1996 1997 1998
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183ZAR
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 for 2004-2011 Ford Crown Victoria
A-Premium®Part # APALR177
Alternator Rectifier Diode for 2004-2011 Ford Crown Victoria
52 Reviews
$37.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Ford Crown Victoria: 2004 2005 2006 2007 2008 2009 2010 2011
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018418V
Note
14 Volt, 135mm OD, 16-50A General Diodes
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Alternator Rectifier Diode with Aluminum Heat Sink for 1971-1974 Dodge B300 Van
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1971-1974 Dodge B300 Van
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge B300 Van: 1971 1972 1973 1974
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184SKU
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 Imperial
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1973 Chrysler Imperial
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 #10184SWX
Note
【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.
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Alternator Rectifier Diode for 2006-2008 Kia Magentis
A-Premium®Part # APALR005
Alternator Rectifier Diode for 2006-2008 Kia Magentis
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 #101882TQ
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 1993-1997 Jaguar Vanden Plas
A-Premium®Part # APALR005
Alternator Rectifier Diode for 1993-1997 Jaguar Vanden Plas
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 #10188129
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 2006-2009 Kia Optima
A-Premium®Part # APALR005
Alternator Rectifier Diode for 2006-2009 Kia Optima
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 #101882RA
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 with Trio for 1978-1981 BMW 633CSi
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1978-1981 BMW 633CSi
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 633CSi: 1978 1979 1980 1981
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015231D
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 1975-1978 BMW 530i
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1975-1978 BMW 530i
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 530i: 1975 1976 1977 1978
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10152492
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 Aluminum Heat Sinks 8-50A for 1997-1999 Toyota Tacoma
A-Premium®Part # APALR008
Alternator Rectifier Diode with Aluminum Heat Sinks 8-50A for 1997-1999 Toyota Tacoma
52 Reviews
$58.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Tacoma: 1997 1998 1999
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Quantity1
Item LocatedUnited States
ConditionNew
item #101523RR
Note
【Note-1】 14 Volt, 117mm OD, 8-50 A Diodes, M6 Battery Post (31°).
【Note-2】 This item comes with Aluminum Heat Sinks.
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Alternator Rectifier Diode for 1978-1980 1982 1984-1986 Chevrolet K30
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1978-1980 1982 1984-1986 Chevrolet K30
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet K30: 1978 1979 1980 1982 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #10152199
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1978-1987 1989-1990 Chevrolet G30
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1978-1987 1989-1990 Chevrolet G30
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet G30: 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015259A
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1987 Chevrolet R10 Suburban
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1987 Chevrolet R10 Suburban
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 Suburban
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015248X
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1987 Chevrolet V20 Suburban
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1987 Chevrolet V20 Suburban
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1987 Chevrolet V20 Suburban
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101526C5
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode with Trio for 1980-1981 Volvo 264
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1980-1981 Volvo 264
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volvo 264: 1980 1981
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Quantity1
Item LocatedUnited States
ConditionNew
item #101524L9
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 1900
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1974-1975 Opel 1900
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Opel 1900: 1974 1975
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101525W0
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 1978 Fiat 131
A-Premium®Part # APALR033
Alternator Rectifier Diode with Trio for 1978 Fiat 131
52 Reviews
$34.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1978 Fiat 131
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015217H
Note
【Note-1】 14 Volt, 114mm OD, 6-35A Diodes, M6×52.5mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
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Page 14 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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