Heavy Duty Alternator

Delco Remy 36SI™ High Output Brushless Alternator

The 36SI™ is a durable brushless model available in an output rating up to 170 Amps at 12 volts or up to 105 Amps at 24 Volts. The premium brushless design of the Delco Remy 36SI provides added durability and life of the alternator.  Remote Sense is optional on the Delco Remy 36SI. The durable and fuel efficient 36SI has quickly become the new fleet standard.  Upgrade from the 33SI, 34SI & 35SI models and competitive models to 36SI and dramatically reduce inventory costs.

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Performance Output 12 Volts 170 Amps (100 Amps at idle)
24 Volts 105 Amps
Maximum Speed 10,000 RPM Continuous
12,000 RPM Intermittent
Rotation Clockwise
Temperature Rating 125°C / 257°F
Mounting J180 Short Hinge
Polarity Negative Ground (Standard)
Isolated Ground (Available)
Efficiency 68%
Weight 25.4 lbs / 11.5 kg
Stator Diameter 5.98 in / 152 mm
Length 10.35 in / 263 mm
Remote Sense Optional
*(US /Canada Only)
3 year / 350,000 miles - New Service
2 year / 250,000 miles - Reman



Brushless Durability

The Delco Remy 36SI brushless alternator design dramatically increases both the durability and the life of the alternator.

Here’s why: Brushless alternators have fewer moving parts, which means less wear on the alternator. The end result is longer life. Alternators pull air from the back to the front in order to cool the internal electronics. This process introduces contaminants to the alternator. With a brushless alternator, there are no issues of contaminants hanging up brushes and causing failures. Without brushes, there are 13 fewer moving parts, eliminating components that wear out.

Bottom line: Delco Remy’s 36SI brushless alternator design leads to reduced downtime and longer life.

Remote Sense

Remote Sense can reduce battery charge time by 50%.
Some 36SI models are equipped with Remote Sense which utilizes a second wire that reads the actual to boost its output to compensate for the voltage drop, ensuring 14 Volts at the battery.  The proper voltage forces more current into the battery bringing it to a full state of charge between vehicle stops.

High Temperature Rating

Enhanced electronics allow the Delco Remy 36SI to work efficiently at even higher operating temperatures—up to 257°F or 125°C.
These improvements include:
- A 30% increased diode rating
- Extended rectifier surface, which adds additional cooling fins

Optional Isolated Ground

Most alternators are grounded through the alternator’s housing. The Delco Remy 36SI alternator offers optional isolated grounding, which helps to avoid corrosion.


The Delco Remy 36SI alternator has demonstrated that it has the power to meet increasing electrical demands. 

The Delco Remy 36SI alternator provides superior output performance at low RPM and at road speed. It is ideal for applications such as refuse, trucks with lift gates, line haul tractors, and delivery trucks