Skip to product information
Automatic Voltage Regulator AVR for CAT Gas Eng G3306 G3406 G3408 G3408B G3412 — product image 1 | Northline Parts

Automatic Voltage Regulator AVR for CAT Gas Eng G3306 G3406 G3408 G3408B G3412

SKU: NLT2T01314
$215.99 In Stock
$215.99
Sale price  $215.99 Regular price 
Ships for free in 2–4 business days.
Replace a failed automatic voltage regulator in a compatible Caterpillar-engine generator set to correct unstable alternator output.
Estimated delivery between
Shop at Northline Parts Best Customer Service Best Online Parts

Let Northline Parts Do the Heavy Lifting for You!

Not sure which part you need? Our team can help you find the right replacement.

Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT

Live Chat: Available 24/7

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
Compatible Equipment / Model
Generator sets powered by Caterpillar G3306, G3406, G3408, G3408B and G3412 engines, only where regulator specifications match

Product Overview

An AVR controls generator excitation to hold output voltage near its setpoint as electrical load changes. Poor regulation can cause low, high or fluctuating voltage.

Confirm engine speed, sensing wires, excitation winding and terminal connections before blaming the AVR.

Key Features & Performance

  • Part: Automatic Voltage Regulator AVR
  • Primary application: Generator sets powered by Caterpillar G3306, G3406, G3408, G3408B and G3412 engines, only where regulator specifications match
  • Reference: No verified AVR part number in original title

OE / Reference Numbers

  • No verified AVR part number in original title

Fitment & Compatibility Notes

Match the existing regulator model and excitation/output ratings; engine model alone cannot identify generator AVR compatibility.

Frequently Asked Questions

Is this a genuine OEM part? This listing is for a replacement part unless specifically identified as genuine OEM. OE numbers are provided for identification.

How do I confirm fitment? Match the existing regulator model and excitation/output ratings; engine model alone cannot identify generator AVR compatibility.

Part Summary

keywords: Automatic Voltage Regulator AVR for CAT Gas Eng G3306 G3406 G3408 G3408B G3412, No verified AVR part number in original title, Generator sets powered by Caterpillar G3306, G3406, G3408, G3408B and G3412 engines, only where regulator specifications match

Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.

Customers also purchased