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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 1984-1986 Oldsmobile Delta 88

A-Premium®Part # APALR175

Alternator Rectifier Diode for 1984-1986 Oldsmobile Delta 88

52 Reviews

$20.99

Low stock: Only 3 left

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2-year warranty

90 days free return

Fits Oldsmobile Delta 88: 1984 1985 1986

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015L909

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1983 Pontiac Grand LeMans

52 Reviews

$20.99

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2-year warranty

90 days free return

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LA0V

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1984-1986 Oldsmobile 98

52 Reviews

$20.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Oldsmobile 98: 1984 1985 1986

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015L9SH

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1987 Chevrolet Beretta

52 Reviews

$20.99

Low stock: Only 3 left

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2-year warranty

90 days free return

Fits 1987 Chevrolet Beretta

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LCW5

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1985 Cadillac Seville

52 Reviews

$20.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits 1985 Cadillac Seville

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LA1W

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1984-1985 Oldsmobile Cutlass Supreme

52 Reviews

$20.99

Low stock: Only 3 left

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2-year warranty

90 days free return

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015L6T0

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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A-Premium®Part # APALR175

Alternator Rectifier Diode for 1983-1986 Buick Electra

52 Reviews

$20.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Buick Electra: 1983 1984 1985 1986

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015L7TA

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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A-Premium®Part # APALR121

Alternator Rectifier Diode With Trio for 1992-1997 Geo Metro

52 Reviews

$30.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Geo Metro: 1992 1993 1994 1995 1996 1997

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LKV3

Note

This item is a 14 Volt, 8–35A block/ampere diode with an M6×49.5 mm battery post.

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A-Premium®Part # APALR051

Alternator Rectifier Diode with Trio for 1988-1989 Ford Festiva

52 Reviews

$28.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Ford Festiva: 1988 1989

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HQDQ

Note

This item is a 12 Volt, 6–35A general diode with an M5×49 mm battery post and trio.

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A-Premium®Part # APALR121

Alternator Rectifier Diode With Trio for 1989-1995 Geo Tracker

52 Reviews

$30.99

Low stock: Only 3 left

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2-year warranty

90 days free return

Fits Geo Tracker: 1989 1990 1991 1992 1993 1994 1995

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LL29

Note

This item is a 14 Volt, 8–35A block/ampere diode with an M6×49.5 mm battery post.

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A-Premium®Part # APALR044

Alternator Rectifier Diode for 1971-1972 Buick GS

52 Reviews

$33.99

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2-year warranty

90 days free return

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LHT8

Note

This item is a 12V/24V, 6–25A button diode with 102 mm OD.

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A-Premium®Part # APALR070

Alternator Rectifier Diode for 1989 GMC V3500

52 Reviews

$31.99

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2-year warranty

90 days free return

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HR5A

Note

This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.

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A-Premium®Part # APALR070

Alternator Rectifier Diode for 1997-2000 GMC C6500 Topkick

52 Reviews

$31.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits GMC C6500 Topkick: 1997 1998 1999 2000

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HRXR

Note

This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.

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A-Premium®Part # APALR070

Alternator Rectifier Diode for 1990-1995 GMC C1500

52 Reviews

$31.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits GMC C1500: 1990 1991 1992 1993 1994 1995

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HP64

Note

This item is a 12 Volt, 3-50A press-fit/avalanche diode with 102 mm OD.

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A-Premium®Part # APALR096

Alternator Rectifier Diode with Trio for 1988-1991 Honda CRX

52 Reviews

$28.99

Low stock: Only 4 left

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2-year warranty

90 days free return

Fits Honda CRX: 1988 1989 1990 1991

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LL4A

Note

【Note-1】 This item is a 12 Volt, 6-35A block/ampere diode with trio.
【Note-2】 For Dodge & Plymouth Colt L4 1.6L, this item only fits the vehicle built before 5/1986.

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A-Premium®Part # APALR096

Alternator Rectifier Diode with Trio for 1985-1986 Plymouth Colt

52 Reviews

$28.99

Low stock: Only 4 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Plymouth Colt: 1985 1986

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015LDL9

Note

【Note-1】 This item is a 12 Volt, 6-35A block/ampere diode with trio.
【Note-2】 For Dodge & Plymouth Colt L4 1.6L, this item only fits the vehicle built before 5/1986.

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A-Premium®Part # APALR058

Alternator Rectifier Diode for 1998-2002 Saturn SL1

52 Reviews

$23.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Saturn SL1: 1998 1999 2000 2001 2002

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HS31

Note

This item is a 12 Volt, 6-50A avalanche diode with 100 mm OD.

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A-Premium®Part # APALR084

Alternator Rectifier Diode for 2001 2003-2009 Dodge Ram 3500

52 Reviews

$30.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge Ram 3500: 2001 2003 2004 2005 2006 2007 2008 2009

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HP8R

Note

This item is a 12 Volt, 6-60A diode with 120 mm OD, an M8×59.5 mm battery post (L) and an M8×22 mm battery post (R).

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A-Premium®Part # APALR084

Alternator Rectifier Diode for 2001 Dodge Ram 1500

52 Reviews

$30.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits 2001 Dodge Ram 1500

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Quantity1

Item LocatedUnited States

ConditionNew

item #1015HPSX

Note

This item is a 12 Volt, 6-60A diode with 120 mm OD, an M8×59.5 mm battery post (L) and an M8×22 mm battery post (R).

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A-Premium®Part # APALR091

Alternator Rectifier Diode for 2002 2004-2006 Ford E-350 Super Duty

52 Reviews

$32.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Ford E-350 Super Duty: 2002 2004 2005 2006

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Quantity1

Item LocatedUnited States

Kit Parts Included2x Rear Lower Forward Control Arm:xxx; 1x Rear driver Lower Rearward Control Arm:xxx

ConditionNew

item #1018XK3C

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Page 63 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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