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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 2008 Mazda TributeAlternator Rectifier Diode for 2008 Mazda Tribute
A-Premium®Part # APALR052
Alternator Rectifier Diode for 2008 Mazda Tribute
52 Reviews
$43.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 2008 Mazda Tribute
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183YNH
Note
12 Volt, 128mm OD, 12-50A General Diodes
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Alternator Rectifier Diode with Trio for 1986 BMW 325
A-Premium®Part # APALR110
Alternator Rectifier Diode with Trio for 1986 BMW 325
52 Reviews
$31.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 BMW 325
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Quantity1
Item LocatedUnited States
ConditionNew
item #101841QS
Note
12 Volt, 120mm OD, 6-35 Ampere Press-fit, With Trio
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Alternator Rectifier Diode with Trio for 1986 BMW 325es
A-Premium®Part # APALR110
Alternator Rectifier Diode with Trio for 1986 BMW 325es
52 Reviews
$31.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1986 BMW 325es
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018417Q
Note
12 Volt, 120mm OD, 6-35 Ampere Press-fit, With Trio
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Alternator Rectifier Diode with Copper Heat Sinks for 1993-2004 Lexus GS300
A-Premium®Part # APALR167
Alternator Rectifier Diode with Copper Heat Sinks for 1993-2004 Lexus GS300
52 Reviews
$27.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Lexus GS300: 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183Z5X
Note
【Note-1】 12 Volt, 103mm OD, 8-50A Diodes, M8 Battery Post.
【Note-2】 This item comes with Copper Heat Sinks.
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Alternator Rectifier Diode with Trio for 1991-1993 BMW 318i
A-Premium®Part # APALR178
Alternator Rectifier Diode with Trio for 1991-1993 BMW 318i
52 Reviews
$26.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits BMW 318i: 1991 1992 1993
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Quantity1
Item LocatedUnited States
ConditionNew
item #101841YC
Note
14 Volt, 114mm OD, 6-35A Avalanche Diodes, M8×52.5mm Battery Post, M5×43.7mm Trio Post, with Trio.
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Alternator Rectifier Diode with Trio for 1991-1993 BMW 318is
A-Premium®Part # APALR178
Alternator Rectifier Diode with Trio for 1991-1993 BMW 318is
52 Reviews
$26.99
Low stock: Only 4 left
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 #10183ZZV
Note
14 Volt, 114mm OD, 6-35A Avalanche Diodes, M8×52.5mm Battery Post, M5×43.7mm Trio Post, with Trio.
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Alternator Rectifier Diode for 1979 Mazda RX-7
A-Premium®Part # APALR123
Alternator Rectifier Diode for 1979 Mazda RX-7
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1979 Mazda RX-7
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184180
Note
【Note-1】 12 Volt, Mounting Length: 85mm, 6-35A General Diodes.
【Note-2】 This item comes with Copper Heat Sinks & Trio.
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Alternator Rectifier Diode for 1980-1981 Mazda B2000
A-Premium®Part # APALR123
Alternator Rectifier Diode for 1980-1981 Mazda B2000
52 Reviews
$20.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda B2000: 1980 1981
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018421S
Note
【Note-1】 12 Volt, Mounting Length: 85mm, 6-35A General Diodes.
【Note-2】 This item comes with Copper Heat Sinks & Trio.
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Alternator Rectifier Diode with Trio/Capacitor for 1992-1995 Mitsubishi Diamante
A-Premium®Part # APALR122
Alternator Rectifier Diode with Trio/Capacitor for 1992-1995 Mitsubishi Diamante
52 Reviews
$32.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mitsubishi Diamante: 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183Y91
Note
【Note-1】 12 Volt, 6-35A General Diodes, With M6×49.5mm Battery Post.
【Note-2】 It not fits the model with 90 Amp.
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Alternator Rectifier Diode for 1990-1992 Nissan Stanza
A-Premium®Part # APALR148
Alternator Rectifier Diode for 1990-1992 Nissan Stanza
52 Reviews
$31.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Nissan Stanza: 1990 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184ESQ
Note
12 Volt, 85mm OD, 8-35 Ampere Diodes, With M5×44mm Battery Post
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Alternator Rectifier Diode for 1987-1992 Dodge Colt
A-Premium®Part # APALR144
Alternator Rectifier Diode for 1987-1992 Dodge Colt
52 Reviews
$26.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Colt: 1987 1988 1989 1990 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #10183Y06
Note
【Note-1】 12 Volt, 96.7mm OD, 6-35A Diodes, M5×49mm Battery Post, with Trio.
【Note-2】 For Mitsubishi Mirage, this item fits the model to 4/1988.
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Alternator Rectifier Diode for 2002-2008 Dodge Ram 3500
A-Premium®Part # APALR138
Alternator Rectifier Diode for 2002-2008 Dodge Ram 3500
52 Reviews
$36.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Dodge Ram 3500: 2002 2003 2004 2005 2006 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184S27
Note
14 Volt, 120mm OD, 6-50A Avalanche Diodes, With M8×22mm Battery Post(L), With M8×32mm Battery Post(R).
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Alternator Rectifier Diode for 2006-2008 Suzuki Grand Vitara
A-Premium®Part # APALR050
Alternator Rectifier Diode for 2006-2008 Suzuki Grand Vitara
52 Reviews
$39.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Suzuki Grand Vitara: 2006 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #10184SQZ
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M6×28.5mm Battery Post.
【Note-2】 This item comes without Trio & Capacitor.
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Alternator Rectifier Diode with Trio for 1999-2001 Mercedes-Benz ML430
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1999-2001 Mercedes-Benz ML430
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz ML430: 1999 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1018415C
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
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Alternator Rectifier Diode with Trio for 2002-2003 Audi S6
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 2002-2003 Audi S6
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Audi S6: 2002 2003
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183YVZ
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1996-2002 Mercedes-Benz SL600
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1996-2002 Mercedes-Benz SL600
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz SL600: 1996 1997 1998 1999 2000 2001 2002
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183X3U
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1994-2001 Mercedes-Benz SL500
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1994-2001 Mercedes-Benz SL500
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz SL500: 1994 1995 1996 1997 1998 1999 2000 2001
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183ZD5
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1997-2003 Audi A8 Quattro
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1997-2003 Audi A8 Quattro
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Audi A8 Quattro: 1997 1998 1999 2000 2001 2002 2003
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183X1C
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode with Trio for 1994-1999 Mercedes-Benz S500
A-Premium®Part # APALR109
Alternator Rectifier Diode with Trio for 1994-1999 Mercedes-Benz S500
52 Reviews
$57.99
Low stock: Only 2 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mercedes-Benz S500: 1994 1995 1996 1997 1998 1999
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #10183YN2
Note
【Note-1】 12 Volt, 122mm OD, 12-50A Avalanche Diodes, M8×30mm Battery Post.
【Note-2】 This item comes with Trio.
Show less
Alternator Rectifier Diode for 2007-2010 GMC Yukon XL 1500
A-Premium®Part # APALR093
Alternator Rectifier Diode for 2007-2010 GMC Yukon XL 1500
52 Reviews
$46.99
Low stock: Only 5 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits GMC Yukon XL 1500: 2007 2008 2009 2010
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
Part interchange
10503581, 10510904, DR3580, RD-40HA, RD40HA
ConditionNew
item #1018SLU7
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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

Alternator Voltage Regulator
Alternator Voltage Regulator
Alternator
Alternator
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Water Pump
Water Pump