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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 Aluminum Heat Sinks for 1987-1990 Pontiac SunbirdAlternator Rectifier Diode with Aluminum Heat Sinks for 1987-1990 Pontiac Sunbird
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1987-1990 Pontiac Sunbird
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Sunbird: 1987 1988 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HQ4S
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1991-1995 Chevrolet C3500HD
A-Premium®Part # APALR165
Alternator Rectifier Diode with Aluminum Heat Sinks for 1991-1995 Chevrolet C3500HD
52 Reviews
$23.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet C3500HD: 1991 1992 1993 1994 1995
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HKS6
Note
【Note-1】 This item is a 12 Volt, 6-35A press-fit/avalanche diode with 100.3 mm OD.
【Note-2】 This item comes with aluminum heat sinks.
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Alternator Rectifier Diode for 1969-1970 1973-1988 Pontiac Bonneville
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1969-1970 1973-1988 Pontiac Bonneville
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Bonneville: 1969 1970 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VNCU
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode for 1987-1990 Jeep Wrangler
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1987-1990 Jeep Wrangler
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Jeep Wrangler: 1987 1988 1989 1990
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VQC1
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode for 1969-1970 1973-1981 Pontiac LeMans
A-Premium®Part # APALR069
Alternator Rectifier Diode for 1969-1970 1973-1981 Pontiac LeMans
52 Reviews
$19.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac LeMans: 1969 1970 1973 1974 1975 1976 1977 1978 1979 1980 1981
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Quantity1
Item LocatedUnited States
ConditionNew
item #1016VPPR
Note
14 Volt, 86.4mm OD, 6-25 Ampere Button Diodes.
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Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Pontiac Bonneville
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 Pontiac Bonneville
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 Pontiac Bonneville
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L73Q
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 with Aluminum Heat Sinks for 1994 GMC Safari
A-Premium®Part # APALR172
Alternator Rectifier Diode with Aluminum Heat Sinks for 1994 GMC Safari
52 Reviews
$26.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1994 GMC Safari
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L82Y
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 with Trio for 1995-1997 2000-2001 Volkswagen EuroVan
A-Premium®Part # APALR066
Alternator Rectifier Diode with Trio for 1995-1997 2000-2001 Volkswagen EuroVan
52 Reviews
$40.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Volkswagen EuroVan: 1995 1996 1997 2000 2001
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HL2X
Note
This item is a 12 Volt, 6–50A avalanche diode with 112 mm OD, an M8×30 mm battery post, and trio.
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Alternator Rectifier Diode with Trio for 1993-1997 Mazda MX-6
A-Premium®Part # APALR103
Alternator Rectifier Diode with Trio for 1993-1997 Mazda MX-6
52 Reviews
$31.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Mazda MX-6: 1993 1994 1995 1996 1997
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LDR7
Note
This item is a 12 Volt, 8–35A block/ampere diode with an M5×44 mm battery post.
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Alternator Rectifier Diode for 1989-1992 Isuzu Amigo
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1989-1992 Isuzu Amigo
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Isuzu Amigo: 1989 1990 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LCG0
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 1991-1992 Isuzu Rodeo
A-Premium®Part # APALR060
Alternator Rectifier Diode for 1991-1992 Isuzu Rodeo
52 Reviews
$23.99
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Isuzu Rodeo: 1991 1992
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8GW
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 Heat Sinks for 2007-2008 Freightliner Sprinter 3500
A-Premium®Part # APALR153
Alternator Rectifier Diode with Heat Sinks for 2007-2008 Freightliner Sprinter 3500
52 Reviews
$31.99
Low stock: Only 4 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Freightliner Sprinter 3500: 2007 2008
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015HNGY
Note
This item is a 12 Volt, 6–50A avalanche diode with 129 mm OD, an M8×34.5 mm battery post (L), and an M8×22 mm battery post (R).
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Alternator Rectifier Diode with Insulator for 1999-2004 Sterling Truck AT9500
A-Premium®Part # APALR127
Alternator Rectifier Diode with Insulator for 1999-2004 Sterling Truck AT9500
52 Reviews
$34.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Sterling Truck AT9500: 1999 2000 2001 2002 2003 2004
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015LD3V
Note
This item is a 12 Volt, 6–50A press-fit/avalanche diode with 116 mm OD and a 5/16''×45 mm battery post.
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Alternator Rectifier Diode for 1985-1986 Pontiac Firefly
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1986 Pontiac Firefly
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Firefly: 1985 1986
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Quantity1
Item LocatedUnited States
ConditionNew
item #1015L9HQ
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 1985-1986 Oldsmobile Cutlass
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1986 Oldsmobile Cutlass
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Oldsmobile Cutlass: 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L880
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.
Show less
Alternator Rectifier Diode for 1985-1987 Chevrolet Caprice
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985-1987 Chevrolet Caprice
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Chevrolet Caprice: 1985 1986 1987
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L8YH
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.
Show less
Alternator Rectifier Diode for 1983-1986 Pontiac Grand Prix
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Pontiac Grand Prix
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac Grand Prix: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015LAA8
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.
Show less
Alternator Rectifier Diode for 1983 Pontiac J2000
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983 Pontiac J2000
52 Reviews
$20.99
Low stock: Only 3 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 #1015LAN7
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.
Show less
Alternator Rectifier Diode for 1985 Cadillac Commercial Chassis
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1985 Cadillac Commercial Chassis
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits 1985 Cadillac Commercial Chassis
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L73E
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.
Show less
Alternator Rectifier Diode for 1983-1986 Pontiac 6000
A-Premium®Part # APALR175
Alternator Rectifier Diode for 1983-1986 Pontiac 6000
52 Reviews
$20.99
Low stock: Only 3 left
Enter ZIP codeFree standard shipping
2-year warranty
90 days free return
Fits Pontiac 6000: 1983 1984 1985 1986
Check if this fits your vehicle
Quantity1
Item LocatedUnited States
ConditionNew
item #1015L6T2
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.
Show less
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Page 27 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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