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Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

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12 Volt Alternators for Cummins Engines 95 Amp and Under

Diesel Parts Direct carries a great selection of new and remanufactured 12 Volt alternators ranging from 50 to 95 Amp for Cummins diesel engines, including 10SI, 11SI, 21SI, 25SI, 27SI, 30SI, 8MR, AAK, and K1 models.

If you do not see the part you are looking for, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will gladly assist you.

DS-203176

ALTERNATOR - 25SI (12V, 50A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$781.40

DS-203179

ALTERNATOR - 25SI (12V, 50A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$781.40

DS-213298

ALTERNATOR - 27SI (12V, 80A)

Also Available in Remanufactured

$401.61

DS-213299

ALTERNATOR - 27SI (12V, 80A)

Also Available in Remanufactured

$401.61

DS-214318

ALTERNATOR - 25SI (12V, 75A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$731.60

DS-3008988

ALTERNATOR - 30SI (12V, 90A)

Also Available in Remanufactured

$892.12

DS-3282554

ALTERNATOR - K1 (12V, 95A)

Also Available in Remanufactured

$376.28

DS-3603848

ALTERNATOR - 25SI (12V, 50A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$781.40

DS-3603851

ALTERNATOR - 27SI (12V, 80A)

$401.61

DS-3603853

ALTERNATOR - 27SI (12V, 65A, INTERNAL REGULATOR, EXTERNAL FAN)

$446.02

DS-3603854

ALTERNATOR - 30SI (12V, 90A)

$892.12

DS-3604448

ALTERNATOR - K1 (12V, 65A)

Also Available in Remanufactured

$338.96

DS-3604475

ALTERNATOR - 10SI (12V, 61A)

$695.90

DS-3604480

ALTERNATOR - 8MR (12V, 65A)

Also Available in Remanufactured

$695.90

DS-3604663

ALTERNATOR - 10SI (12V, 63A)

$250.30

DS-3604675

ALTERNATOR (12V, 90A, EXTERNAL REGULATOR, EXTERNAL FAN)

$389.01

DS-3604685

ALTERNATOR - 30SI (12V, 60A, INTERNAL REGULATOR, EXTERNAL FAN)

$895.66

DS-3675174

ALTERNATOR - 21SI (12V, 70A, INTERNAL REGULATOR, EXTERNAL FAN)

$403.55

DS-3675270

ALTERNATOR - K1 (12V, 65A)

Also Available in Remanufactured

$338.96

DS-3905224

ALTERNATOR - 10SI (12V, 61A)

Also Available in Remanufactured

$304.43

DS-3907749

ALTERNATOR - AAK (12V, 70A)

$581.71

DS-3920679

ALTERNATOR - K1 (12V, 65A)

Also Available in Remanufactured

$338.96

DS-39206791

ALTERNATOR - K1 (12V, 65A)

Also Available in Remanufactured

$338.96

DS-3972730

ALTERNATOR - 11SI (12V, 95A)

Also Available in Remanufactured

$481.76

DS-4988274

ALTERNATOR - 11SI (12V, 95A)

Also Available in Remanufactured

$481.76

DS-5293586

ALTERNATOR - 11SI (12V, 95A)

Also Available in Remanufactured

$481.76

DS-EE8133

ALTERNATOR - 21SI (12V, 70A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$403.55

DS-EE9023

ALTERNATOR - 8MR (12V, 65A)

Also Available in Remanufactured

$695.90

DS-EE9059

ALTERNATOR - 21SI (12V, 70A, INTERNAL REGULATOR, EXTERNAL FAN)

Also Available in Remanufactured

$403.55

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
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Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

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