Alternators

0-33000-5840 24V 25A Alternator for Komatsu D20 D20A

Q: What numbers are documented for 0-33000-5840?

Primary Part Number: 0-33000-5840. Source Catalog Number: 12251N-1G. Catalog Cross-Reference - Verify Configuration: 0-33000-5850. Catalog Cross-Reference - Verify Configuration: 0-33000-5860. Catalog Cross-Reference - Verify Configuration: 0-33000-5870. Catalog Cross-Reference - Verify Configuration: 0-33000-5880. Catalog Cross-Reference - Verify Configuration: 0-33000-6510. Catalog Cross-Reference - Verify Configuration: 0-33000-6511. Catalog Cross-Reference - Verify Configuration: 01-33-2000. Catalog Cross-Reference - Verify Configuration: 025861. Catalog Cross-Reference - Verify Configuration: 1-3092-01NK. Catalog Cross-Reference - Verify Configuration: 1-3092-02NK. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 0-33000-5840 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

1 product photo · Swipe on mobile, or hover and select a thumbnail.

OEM / reference0-33000-5840

SpecificationAlternator

Catalog ID53687781

Product Type: Alternator
Product Brand: EexcavaStart
Technical Specification: 25 Amp/24 Volt, CW, 1-Groove Pulley
Design: IR/EF
Voltage: 24
Rated Output: 25
Rotation: CW
Pulley: V1
Condition: New replacement part

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Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.

Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Exact catalog identity	0-33000-5840
Source Catalog Number	Exact technical catalog record	12251N-1G
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-5850
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-5860
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-5870
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-5880
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-6510
Cross-reference (fitment check required)	Exact catalog record; configuration check required	0-33000-6511
Cross-reference (fitment check required)	Exact catalog record; configuration check required	01-33-2000
Cross-reference (fitment check required)	Exact catalog record; configuration check required	025861
Cross-reference (fitment check required)	Exact catalog record; configuration check required	1-3092-01NK
Cross-reference (fitment check required)	Exact catalog record; configuration check required	1-3092-02NK
Cross-reference (fitment check required)	Exact catalog record; configuration check required	110562
Cross-reference (fitment check required)	Exact catalog record; configuration check required	110652
Cross-reference (fitment check required)	Exact catalog record; configuration check required	110657
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251A
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251B
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251N
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251N-2G
Cross-reference (fitment check required)	Exact catalog record; configuration check required	12251R-1G
Cross-reference (fitment check required)	Exact catalog record; configuration check required	144-25205
Cross-reference (fitment check required)	Exact catalog record; configuration check required	250-12251
Cross-reference (fitment check required)	Exact catalog record; configuration check required	285-105
Cross-reference (fitment check required)	Exact catalog record; configuration check required	285-108
Cross-reference (fitment check required)	Exact catalog record; configuration check required	285-108B
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50000
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50003
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50004
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50005
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50008
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50010
Cross-reference (fitment check required)	Exact catalog record; configuration check required	400-50029
Cross-reference (fitment check required)	Exact catalog record; configuration check required	40789RI
Cross-reference (fitment check required)	Exact catalog record; configuration check required	40789RIW
Cross-reference (fitment check required)	Exact catalog record; configuration check required	40790RI
Cross-reference (fitment check required)	Exact catalog record; configuration check required	40790RIW
Cross-reference (fitment check required)	Exact catalog record; configuration check required	50601
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6110
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6120
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6130
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6140
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6150
Cross-reference (fitment check required)	Exact catalog record; configuration check required	600-821-6160
Cross-reference (fitment check required)	Exact catalog record; configuration check required	90-28-4008
Cross-reference (fitment check required)	Exact catalog record; configuration check required	93017
Cross-reference (fitment check required)	Exact catalog record; configuration check required	946.001.025
Cross-reference (fitment check required)	Exact catalog record; configuration check required	946.001.025.170
Cross-reference (fitment check required)	Exact catalog record; configuration check required	946.002.030.170
Cross-reference (fitment check required)	Exact catalog record; configuration check required	A-8787

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

0-33000-5840

Cross-reference (fitment check required)

0-33000-5850
0-33000-5860
0-33000-5870
0-33000-5880
0-33000-6510
0-33000-6511
01-33-2000
025861
1-3092-01NK
1-3092-02NK
110562
110652
110657
12251
12251A
12251B
12251N
12251N-2G
12251R-1G
144-25205
250-12251
285-105
285-108
285-108B
400-50000
400-50003
400-50004
400-50005
400-50008
400-50010
400-50029
40789RI
40789RIW
40790RI
40790RIW
50601
600-821-6110
600-821-6120
600-821-6130
600-821-6140
600-821-6150
600-821-6160
90-28-4008
93017
946.001.025
946.001.025.170
946.002.030.170
A-8787

Other documented relationship

12251N-1G

Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.

Product summary

Alternator

Category: Alternators
Catalog ID: 53687781
Photo views: 1

Before ordering

Confirm these details

Confirm voltage and rated amperage against the original alternator label.
Compare mounting ears, pulley type and pulley-groove count.
Check plug shape, terminal position and regulator connection.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

60 model references

Exact catalog application: Make: Komatsu · Model: D20 · Year: 1986-1987 · Engine: 4D94-2 Engine
Exact catalog application: Make: Komatsu · Model: D20A · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D20P · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D20S · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D21 · Year: 1986-1987 · Engine: 4D94-2 Engine
Exact catalog application: Make: Komatsu · Model: D21A · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D21P · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D21S · Year: 1991-1994 · Engine: 4D95S Engine
Exact catalog application: Make: Komatsu · Model: D31 · Year: 1986-1987 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 6D105-5 Engine
Exact catalog application: Make: Komatsu · Model: D41 · Year: 1986-1995 · Engine: 6D105-5 Engine
Exact catalog application: Make: Komatsu · Model: D50 · Year: 1988-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: D53 · Year: 1988-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EC170Z · Year: 1986-1995 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: EC170Z · Year: 1986-1995 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: EC170Z · Year: 1986-1995 · Engine: 6D110 Engine
Exact catalog application: Make: Komatsu · Model: EC170ZS · Year: 1986-1995 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: EC170ZS · Year: 1986-1995 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: EC170ZS · Year: 1986-1995 · Engine: 6D110 Engine
Exact catalog application: Make: Komatsu · Model: EC210Z · Year: 1986-1995 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: EC210Z · Year: 1986-1995 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: EC210Z · Year: 1986-1995 · Engine: 6D110 Engine
Exact catalog application: Make: Komatsu · Model: EC260Z · Year: 1995-1997 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EG220 · Year: 1986-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EG220BS · Year: 1986-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EG275B · Year: 1986-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EG275BS · Year: 1986-1995 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: EZ105Z · Year: 1986-1995 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: EZ105Z · Year: 1986-1995 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: EZ105Z · Year: 1986-1995 · Engine: 6D110 Engine
Exact catalog application: Make: Komatsu · Model: EZ105ZS · Year: 1986-1995 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: EZ105ZS · Year: 1986-1995 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: EZ105ZS · Year: 1986-1995 · Engine: 6D110 Engine
Exact catalog application: Make: Komatsu · Model: FD100E · Year: 1995-2007 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: FD180 · Year: 1986-2007 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: FD200E · Year: 1986-2007 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD250 · Year: 1986-2007 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD250E-1 · Year: 1995-2007 · Engine: S6D125 Komatsu Diesel
Exact catalog application: Make: Komatsu · Model: FD250E · Year: 1986-1994 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD280 · Year: 1986-2007 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD400 · Year: 1986-2007 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD400E-1 · Year: 1995-2007 · Engine: S6D125 Komatsu Diesel
Exact catalog application: Make: Komatsu · Model: FD400E · Year: 1986-1994 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: FD70 · Year: 1986-2007 · Engine: 6D105 Komatsu Diesel
Exact catalog application: Make: Komatsu · Model: FDE30HT · Year: 1986-2007 · Engine: 4D95L Komatsu Diesel
Exact catalog application: Make: Komatsu · Model: GD200 · Year: 1986-1991 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: GD300 · Year: 1986-1991 · Engine: 4D105 Engine
Exact catalog application: Make: Komatsu · Model: GD510R · Year: 1995-1997 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: GD510R · Year: 1995-1997 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: GD510R · Year: 1995-1997 · Engine: 6D95 Engine
Exact catalog application: Make: Komatsu · Model: GD511R · Year: 1995-1997 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: GD511R · Year: 1995-1997 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: GD511R · Year: 1995-1997 · Engine: 6D95 Engine
Exact catalog application: Make: Komatsu · Model: GD521A · Year: 1995-1997 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: GD521A · Year: 1995-1997 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: GD521A · Year: 1995-1997 · Engine: 6D95 Engine
Exact catalog application: Make: Komatsu · Model: GD611A · Year: 1995-1997 · Engine: 6D105 Engine
Exact catalog application: Make: Komatsu · Model: GD611A · Year: 1995-1997 · Engine: 6D125 Engine
Exact catalog application: Make: Komatsu · Model: GD611A · Year: 1995-1997 · Engine: 6D95 Engine
Exact catalog application: Make: Komatsu · Model: GD661A · Year: 1995-1997 · Engine: 6D105 Engine

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 0-33000-5840

Which machines use 0-33000-5840?

Recorded compatible model references include Exact catalog application: Make: Komatsu · Model: D20 · Year: 1986-1987 · Engine: 4D94-2 Engine, Exact catalog application: Make: Komatsu · Model: D20A · Year: 1991-1994 · Engine: 4D95S Engine, Exact catalog application: Make: Komatsu · Model: D20P · Year: 1991-1994 · Engine: 4D95S Engine, Exact catalog application: Make: Komatsu · Model: D20S · Year: 1991-1994 · Engine: 4D95S Engine, Exact catalog application: Make: Komatsu · Model: D21 · Year: 1986-1987 · Engine: 4D94-2 Engine, Exact catalog application: Make: Komatsu · Model: D21A · Year: 1991-1994 · Engine: 4D95S Engine, Exact catalog application: Make: Komatsu · Model: D21P · Year: 1991-1994 · Engine: 4D95S Engine, Exact catalog application: Make: Komatsu · Model: D21S · Year: 1991-1994 · Engine: 4D95S Engine and 52 additional models shown on this page. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 0-33000-5840?

Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable.

How do I confirm 0-33000-5840 before ordering?

Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. Send clear photos of the original unit and connector layout when requesting a quote.