Alternator for Cummins 3.3L Diesel & Komatsu Engines - 12V 35A
Alternator for Cummins 3.3L Diesel & Komatsu Engines - 12V 35A
SKU:400-52208
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Alternator for Cummins 3.3L Diesel & Komatsu Engines
12-Volt, 35 Amp · Replaces Denso 101211-1250 / Komatsu 600-861-1350
This alternator is built to OEM specifications for Cummins 3.3L diesel engines and the Komatsu applications that share the same charging unit, giving you a direct replacement that fits and functions exactly like the original. It is a 12V, 35 amp alternator with clockwise rotation, finished with a single V-belt pulley for straightforward installation.
The unit uses an internally regulated (IR) design with an internal fan (IF) and a small frame housing to match the original Cummins fitment, including the oval D-IG-L plug connector for a correct electrical match. Fitting a correctly specified alternator restores full charging performance without needing to adapt the wiring loom, bracket or drive belt.
Key Features
- 12V, 35 Amp output
- Clockwise rotation, 12 o'clock clock position
- Single V-belt pulley (V1 class), 76mm OD / 15mm ID
- Internally regulated with internal fan
- Small frame design for a direct OEM fit
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Amperage | 35A |
| Rotation | Clockwise (CW) |
| Clock Position | 12 |
| Pulley | 1-groove V-belt (V1 class), 76mm OD / 15mm ID |
| Regulator | Internally regulated (IR) |
| Fan Type | Internal (IF) |
| Connector | Oval D-IG-L plug |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model | Years |
|---|---|
| Cummins 3.3L Diesel Engine (1-V pulley, 76mm OD / 15mm ID) | All Years |
| Komatsu applications using alternator 600-861-1350 | Not specified |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 101211-1250 | Denso |
| 600-861-1350 | Komatsu |
| AND0560, ND101211-1250, 021080-0840 | Arrowhead |
Frequently Asked Questions
Will this alternator fit my engine without modification?
Yes, this alternator is built to match the original Cummins 3.3L specification, so it bolts straight in using the factory mounting points and pulley.
What is included?
One complete alternator unit, ready to fit. No bracket, belt or wiring loom is included unless stated.
How do I know my old alternator has failed?
Common signs include a charging warning light, dimming lights, a flat battery, or an intermittent whine from the unit.
Does it also cover Komatsu machines?
Yes — it replaces Komatsu alternator 600-861-1350, so it suits Komatsu equipment carrying that number. Check the number stamped on your original unit before ordering.
What connector does this alternator use?
It uses the original oval D-IG-L plug configuration, matching the factory wiring for a straightforward swap.
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