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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 1993-1998 Volkswagen GolfAlternator Rectifier Diode for 1993-1998 Volkswagen Golf
A-Premium®Part # APALR019
Alternator Rectifier Diode for 1993-1998 Volkswagen Golf
52 Reviews
$35.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen Golf: 1993 1994 1995 1996 1997 1998
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183ZU5
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 1973 Chrysler New Yorker
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1973 Chrysler New Yorker
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1973 Chrysler New Yorker
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184RX3
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 Challenger
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1974 Dodge Challenger
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Challenger: 1970 1971 1972 1973 1974
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184RY9
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 1975-1979 1984-1985 Dodge D100
A-Premium®Part # APALR150
Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1979 1984-1985 Dodge D100
52 Reviews
$14.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge D100: 1975 1976 1977 1978 1979 1984 1985
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184RK1
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 Trio for 1996-1998 2001-2002 BMW Z3
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1996-1998 2001-2002 BMW Z3
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW Z3: 1996 1997 1998 2001 2002
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HR7S
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
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Alternator Rectifier Diode with Trio for 1994-1997 Mercedes-Benz E320
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1994-1997 Mercedes-Benz E320
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz E320: 1994 1995 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HN5R
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
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Alternator Rectifier Diode with Trio for 1993 Mercedes-Benz 300CE
A-Premium®Part # APALR157
Alternator Rectifier Diode with Trio for 1993 Mercedes-Benz 300CE
52 Reviews
$29.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1993 Mercedes-Benz 300CE
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPPV
Note
【Note-1】 This item is a 14 Volt, 6–50A avalanche diode with 107 mm OD and an M8×49 mm battery post.
【Note-2】 This item comes with trio & "W" Terminal.
Show less
Alternator Rectifier Diode for 1991-1993 BMW 318is
A-Premium®Part # APALR170
Alternator Rectifier Diode for 1991-1993 BMW 318is
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 318is: 1991 1992 1993
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L91C
Note
This item is a 12 Volt, 6–35A diode with 114 mm OD, an M8×52.5 mm battery post, an M5×43.7 mm trio post, and trio.
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Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 Chevrolet Tahoe
A-Premium®Part # APALR155
Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 Chevrolet Tahoe
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Tahoe: 2005 2006
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPZY
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M6×51 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode with Negative Heat Sinks for 2007 Chevrolet Silverado 1500 Classic
A-Premium®Part # APALR155
Alternator Rectifier Diode with Negative Heat Sinks for 2007 Chevrolet Silverado 1500 Classic
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2007 Chevrolet Silverado 1500 Classic
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HP89
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M6×51 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 Chevrolet Avalanche 1500
A-Premium®Part # APALR155
Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 Chevrolet Avalanche 1500
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Avalanche 1500: 2005 2006
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQPR
Note
【Note-1】 This item is a 12 Volt, 6–50A press-fit/avalanche diode with 129 mm OD, an M8×22 mm battery post (L), and an M6×51 mm battery post (R).
【Note-2】 This item comes with 129 mm negative heat sink.
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Alternator Rectifier Diode with Trio for 1990-1993 Nissan D21
A-Premium®Part # APALR118
Alternator Rectifier Diode with Trio for 1990-1993 Nissan D21
52 Reviews
$30.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan D21: 1990 1991 1992 1993
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9XN
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 1992-1995 BMW 325i
A-Premium®Part # APALR079
Alternator Rectifier Diode for 1992-1995 BMW 325i
52 Reviews
$50.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 325i: 1992 1993 1994 1995
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNY2
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 for 1977-1978 Toyota Corona
A-Premium®Part # APALR137
Alternator Rectifier Diode for 1977-1978 Toyota Corona
52 Reviews
$28.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota Corona: 1977 1978
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015HPLZ
Note
This item is a 12 Volt, 8–35A diode with 87 mm OD and an M6 battery post (33°).
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Alternator Rectifier Diode for 1994-2000 Mitsubishi Montero
A-Premium®Part # APALR027
Alternator Rectifier Diode for 1994-2000 Mitsubishi Montero
52 Reviews
$28.99
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 #10188118
Note
【Note-1】 14 Volt; 122mm OD; 8-35A Block/Ampere Diodes; M8x54mm Battery Post.
【Note-2】 This item comes with Trio/Capacitor.
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Alternator Rectifier Diode for 2000-2004 Ferrari 360
A-Premium®Part # APALR005
Alternator Rectifier Diode for 2000-2004 Ferrari 360
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 #101883LW
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 1987-1988 Chevrolet Celebrity
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1987-1988 Chevrolet Celebrity
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Celebrity: 1987 1988
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101523TU
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1975-1986 Chevrolet C10
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1975-1986 Chevrolet C10
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C10: 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015264S
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode for 1975-1986 Chevrolet C20
A-Premium®Part # APALR041
Alternator Rectifier Diode for 1975-1986 Chevrolet C20
52 Reviews
$26.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C20: 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015232N
Note
12 Volt, 80mm OD, 6-25 Ampere Button.
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Alternator Rectifier Diode with Aluminum Heat Sinks 8-50A for 1997-1998 Toyota T100
A-Premium®Part # APALR008
Alternator Rectifier Diode with Aluminum Heat Sinks 8-50A for 1997-1998 Toyota T100
52 Reviews
$58.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Toyota T100: 1997 1998
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #101524L7
Note
【Note-1】 14 Volt, 117mm OD, 8-50 A Diodes, M6 Battery Post (31°).
【Note-2】 This item comes with Aluminum Heat Sinks.
Show less
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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.

Related Categories

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Alternator Voltage Regulator
Alternator
Alternator
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Water Pump
Water Pump