Overview
The Delco Remy 30SI is a heavy-duty brush-type alternator with an integral voltage regulator, designed as a modern replacement for the legacy 20DN, 30DN, and 41DN alternator series. Available in 12V, 24V, and 32V configurations, the 30SI features a simplified shaft design that eliminates the woodruff key, reducing inventory complexity and installation time. Its internal regulator provides stable voltage output across varying engine speeds and load conditions, making it particularly well suited for construction equipment, industrial machinery, and off-highway vehicles operating multi-voltage electrical systems.
Key Features
- Internal voltage regulator — no external regulator required
- Available in 12V, 24V, and 32V system configurations
- Direct replacement for legacy 20DN, 30DN, and 41DN series
- Simplified shaft design — no woodruff key required
- Brush-type construction with sealed heavy-duty bearings
- Dust and moisture resistant for harsh operating environments
- Negative ground polarity; clockwise rotation
- Hinge mount compatible with legacy DN-series footprint
Applications
- Construction and earthmoving equipment
- Off-highway and industrial vehicles
- Agricultural machinery
- Power generation sets
- Marine auxiliary systems
- Legacy fleet replacement for 20DN/30DN/41DN alternators
