24/7 Customer service

To make aftermarket auto parts an afterthought.

Add your vehicle

Address

Cart

Item

$0.00

Popular vehicles

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.

All filters
Sort By
Year
Make
Model
Price
Brand
Warranty

Alternator Rectifier Diode with Trio for 1994-1999 BMW 318is

A-Premium®Part # APALR157

Alternator Rectifier Diode with Trio for 1994-1999 BMW 318is

52 Reviews

$29.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW 318is: 1994 1995 1996 1997 1998 1999

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HPZ9

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

A-Premium®Part # APALR157

Alternator Rectifier Diode with Trio for 1994-1995 2001 BMW M3

52 Reviews

$29.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW M3: 1994 1995 2001

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HQDX

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

A-Premium®Part # APALR049

Alternator Rectifier Diode with Ground Screw Hole for 1992 Volvo 740

52 Reviews

$34.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits 1992 Volvo 740

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015L818

Note

This item is a 12 Volt, 8–50A cell/avalanche diode with 103 mm OD and an M8×50 mm battery post.

Show less

A-Premium®Part # APALR155

Alternator Rectifier Diode with Negative Heat Sinks for 2005-2006 Cadillac Escalade EXT

52 Reviews

$26.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Cadillac Escalade EXT: 2005 2006

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HNZE

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.

Show less

A-Premium®Part # APALR170

Alternator Rectifier Diode for 1991-1993 BMW 318i

52 Reviews

$26.99

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW 318i: 1991 1992 1993

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015LASX

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.

Show less

A-Premium®Part # APALR150

Alternator Rectifier Diode with Aluminum Heat Sink for 1970-1976 Dodge Coronet

52 Reviews

$14.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge Coronet: 1970 1971 1972 1973 1974 1975 1976

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #10184RCK

Note

【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.

Show less

A-Premium®Part # APALR150

Alternator Rectifier Diode with Aluminum Heat Sink for 1976-1980 Dodge Aspen

52 Reviews

$14.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge Aspen: 1976 1977 1978 1979 1980

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #10184RA8

Note

【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.

Show less

A-Premium®Part # APALR150

Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge D200

52 Reviews

$14.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge D200: 1975 1976 1977 1978 1979 1980

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #10184PVS

Note

【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.

Show less

A-Premium®Part # APALR027

Alternator Rectifier Diode for 1996-1998 Nissan Quest

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 #1018841C

Note

【Note-1】 14 Volt; 122mm OD; 8-35A Block/Ampere Diodes; M8x54mm Battery Post.
【Note-2】 This item comes with Trio/Capacitor.

Show less

A-Premium®Part # APALR005

Alternator Rectifier Diode for 1993-1997 Jaguar XJ6

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 #101883XZ

Note

【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.

Show less

A-Premium®Part # APALR005

Alternator Rectifier Diode for 2007-2009 Kia Sorento

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 #101882R7

Note

【Note-1】 12 Volt; 113mm OD; 8-50A Cell/Ampere Diodes; M8x47mm Battery Post.
【Note-2】 This item comes with Ground Screw Hole.

Show less

A-Premium®Part # APALR150

Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge B300

52 Reviews

$14.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge B300: 1975 1976 1977 1978 1979 1980

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #10184TPV

Note

【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.

Show less

A-Premium®Part # APALR150

Alternator Rectifier Diode with Aluminum Heat Sink for 1975-1980 Dodge B100

52 Reviews

$14.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge B100: 1975 1976 1977 1978 1979 1980

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #10184U9X

Note

【Note-1】 12 Volt, 3-35A Diodes.
【Note-2】 This item comes with Aluminum Heat Sink.

Show less

A-Premium®Part # APALR079

Alternator Rectifier Diode for 1994-1995 BMW 840Ci

52 Reviews

$50.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW 840Ci: 1994 1995

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HR8N

Note

This item is a 12 Volt, 12–50A diode with 122 mm OD, an M8×30 mm battery post, and trio.

Show less

A-Premium®Part # APALR079

Alternator Rectifier Diode for 1996-1999 BMW 328i

52 Reviews

$50.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits BMW 328i: 1996 1997 1998 1999

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HNAN

Note

This item is a 12 Volt, 12–50A diode with 122 mm OD, an M8×30 mm battery post, and trio.

Show less

A-Premium®Part # APALR137

Alternator Rectifier Diode for 1978 Toyota Cressida

52 Reviews

$28.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits 1978 Toyota Cressida

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HLAY

Note

This item is a 12 Volt, 8–35A diode with 87 mm OD and an M6 battery post (33°).

Show less

A-Premium®Part # APALR137

Alternator Rectifier Diode for 1976-1982 Toyota Corolla

52 Reviews

$28.99

Low stock: Only 3 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Toyota Corolla: 1976 1977 1978 1979 1980 1981 1982

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HKTX

Note

This item is a 12 Volt, 8–35A diode with 87 mm OD and an M6 battery post (33°).

Show less

A-Premium®Part # APALR055

Alternator Rectifier Diode with Aluminum Heat Sinks for 2004-2006 Dodge Durango

52 Reviews

$30.99

Low stock: Only 4 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Dodge Durango: 2004 2005 2006

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HLWC

Note

【Note-1】 This item is a 12 Volt, 7–50A avalanche press-fit diode with 117 mm OD and an M8×40 mm battery post.
【Note-2】 This item comes with aluminum heat sinks.

Show less

A-Premium®Part # APALR157

Alternator Rectifier Diode with Trio for 1994-1996 Mercedes-Benz C220

52 Reviews

$29.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Mercedes-Benz C220: 1994 1995 1996

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HRG1

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

A-Premium®Part # APALR157

Alternator Rectifier Diode with Trio for 1992-1994 Audi 100 Quattro

52 Reviews

$29.99

Low stock: Only 5 left

Enter ZIP codeFree standard shipping

2-year warranty

90 days free return

Fits Audi 100 Quattro: 1992 1993 1994

Check if this fits your vehicle

Quantity1

Item LocatedUnited States

ConditionNew

item #1015HR3V

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

1...21 22 23 24 25...69

Page 23 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.

Related Categories

Alternator Voltage Regulator

Alternator

Fuel Pump

Water Pump