Delco 7975N

Specifications
SPECS: 75 Amp/24 Volt, Bi-Directional, Neg. Grd., w/o pulley
SPECS FOR: Delco 30SI Series IR/EF
MFR: DELCO
MFR SERIES: 30SI

Replaces
Caterpillar 1142401, OR8997, Cummins 3675103RX, Delco 1117805, 1117821, 1117831, 1117836, 1117838, Euclid E820135X, Prestolite 110-459

This alternator is a core power supply unit designed specifically for heavy-duty vehicles and industrial machinery, featuring a rated output of 24V and 75A. It utilizes an advanced bidirectional rotation design, ensuring that the internal cooling fan and power conversion system function correctly regardless of whether the drive source rotates clockwise or counter-clockwise; this greatly enhances installation adaptability and flexibility.
The unit features a built-in regulator and an external fan configuration. The internal regulator precisely controls output voltage stability, protecting the equipment's electronic systems from fluctuations in rotational speed, while the large external fan ensures rapid cooling of the rectifier diodes and stator windings during continuous high-current operation, thereby preventing thermal degradation. Its negative-ground design complies with the electrical standards of most modern machinery and simplifies the wiring process. Designed without a pulley, the unit allows users to configure the setup freely based on specific belt drive ratios. It is widely compatible with various bulldozers, excavators, and large generator sets.