is this genuine stamford or is it a replacement

Hi ChristopherThis is a generic reoplacement that carries a 1 year warranty. We also have the original available at our Amazon store.Ed

Quiero saber si es buen producto y si lo recomiendan

Hasta el momento funciona a la perfección. Y salvo problemas de fabricación como cualquier producto electrónico es recomendable

do you have a wiring diagram for converting from 350-28700 avr to the as440 avr?

If you are going to use the AS440, you won't be connecting P2,P3&P4, for the PMG. They will need to be safely isolated and taped off. 7 &8 are your voltage sensing wires, may also be labeled 2& 3, go on the terminals marked as such. The exciter wires are x and xx and go on the terminals marked as such. All the markings are on the back side of the regulator. Don't forget to set the jumpers for you correct Hz and pole arrangement. This is also shown on the paperwork sent with the regulator.

My as 440 has a transformer on it, this one does not appear to. what is the diference?

First make certain it is the same model. Second,the transformer may have been replaced with other components. None of the replacement AS440 have a transformer.

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Thunder Parts | AVR AS440 | Generic Replacement for Cummins AS440 Automatic Voltage Regulator | 2 Year Warranty

Thunder Parts | AVR AS440 | Generic Replacement for Cummins AS440 Automatic Voltage Regulator | 2 Year Warranty

Product ID: 34788346

⚡±1.0% Voltage Regulation

🔌Selectable Input Voltage Range

🔧2-Year Warranty Assurance

₨27517

Duties & taxes included

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Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up with precision — never miss a beat!

TRUSTED REPLACEMENT - Generic yet perfectly compatible with Cummins AS440 for hassle-free swaps.
PEACE OF MIND WARRANTY - Backed by a 2-year warranty to keep your power systems worry-free.
PRECISION VOLTAGE CONTROL - Maintain stable power with ±1.0% regulation for seamless performance.
RELIABLE CURRENT HANDLING - Supports continuous 4A current with robust 15Ω resistance minimum.
VERSATILE INPUT COMPATIBILITY - Easily switch between 100-130V or 190-264V single-phase inputs to fit your setup.

The Thunder Parts AVR AS440 is a generic replacement automatic voltage regulator designed for Cummins AS440 systems. It offers selectable input voltage ranges (100-130V or 190-264V single-phase), precise voltage regulation within ±1.0%, and continuous 4A current handling. Packaged with a 2-year warranty, it ensures reliable and stable power conversion for your vehicle or watercraft alternator needs.

Specifications

ASIN	B01IDRW0MM
Best Sellers Rank	#520,121 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,451 in Power Converters
Customer Reviews	4.1 4.1 out of 5 stars (19)
Date First Available	July 13, 2016
Is Discontinued By Manufacturer	No
Item Weight	12 ounces
Item model number	AS440 AVR
Manufacturer	Thunder Parts
Package Dimensions	6.4 x 4.6 x 2.4 inches

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