Alternators

Charging / DCB SPARES

ALT2020

Alternator, 21SI Cummins, 24 volt, 100 amp

Aftermarket replacement. Vehicle names and OE references identify compatibility, not the manufacturer of this part. Confirm fitment with DCB before ordering.

Let’s check the right fit.

Contact our team for current pricing, availability and compatibility with your vehicle.

Alternator, 24 volt, 100 amp, 21SI Cummins

Have your vehicle details and original part number ready. We’ll help confirm the match.

THE DETAILS THAT MATTER

Product specifications.

Technical details from the DCB product catalogue.

Voltage
24V
Amperage
100A
Item model
21SI
Pulley grooves
NONE
Regulator & Fan type
IR/EF (INTERNAL REGULATOR - EXTERNAL FAN)
OEM Number
1117897
Use / application
CUMMINS

DCB AssistGUIDE

Your auto-electrical guide

Guided support · catalogue-based replies
DCB ASSIST

Hi, I’m DCB Assist. 👋 Looking for the right connection? Try a part number or tell me what you drive.

A GOOD PLACE TO START

LET’S FIND YOUR PART

Back on the road.
Starts right here.

A few details help our team find the right fit.

Contact & technical details (optional)

Your details stay in this page until you choose to open WhatsApp. You can add a photo of your part there.