---
product_id: 83005080
title: "R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty"
price: "$3556"
currency: MXN
in_stock: true
reviews_count: 2
url: https://www.desertcart.mx/products/83005080-r438-avr-automatic-voltage-regulator-exact-generic-replacement-voltage-95
store_origin: MX
region: Mexico
---

# Voltage Regulation ±0.5% Voltage Sensing 95-520V AC Response Time 0.3-1 sec R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty

**Price:** $3556
**Availability:** ✅ In Stock

## Summary

> ⚡ Power Up Your Performance!

## Quick Answers

- **What is this?** R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty
- **How much does it cost?** $3556 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/83005080-r438-avr-automatic-voltage-regulator-exact-generic-replacement-voltage-95)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Rapid Response Time:** Stay ahead of fluctuations with a swift response time of just 0.3 seconds for rapid voltage variations.
- • **Peace of Mind Warranty:** Enjoy a 2-year warranty, ensuring reliability and confidence in your purchase.
- • **Precision Power Control:** Experience voltage regulation with an impressive ±0.5% accuracy, ensuring your devices run smoothly.
- • **Versatile Voltage Sensing:** Adaptable sensing range from 95 to 520 volts AC, perfect for various applications.
- • **Robust Short Circuit Protection:** Built to handle short circuits with a capability of 3 x Irated for 10 seconds, safeguarding your equipment.

## Overview

The R438 AVR is a high-performance Automatic Voltage Regulator designed for precise voltage control, featuring a ±0.5% regulation accuracy, a wide voltage sensing range of 95-520V AC, and rapid response times. With robust short circuit protection and a 2-year warranty, it’s the perfect solution for ensuring your electrical systems operate efficiently and safely.

## Description

Buy R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty: Voltage Regulators - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good regulator - Oem no longer available. This worked and is used in a continuous application. I would buy again.
Review: Excellent - Excellent

## Features

- Voltage regulation ±0.5%
- Short circuit capability: 3 x Irated for 10 seconds ( AREP or PMG excitation)
- Voltage sensing: 95 to 140 volts (50/60 Hz) or 170 to 260 volts (50/60 Hz) or 340 to 520 volts (50/60 Hz)
- Response time: Normal (1sec) for _+20% voltage variation or rapid (0.3 sec) for ∼+20% voltage variation.
- Remote voltage adjustment range of: _+5% *1000 Series alternators do not have PMG option. 2 Year Warranty!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Thunder Parts |
| Brand | Thunder Parts |
| Model | R438 |
| Item Weight | 1.35 pounds |
| Package Dimensions | 6.5 x 5.4 x 2.2 inches |
| Item model number | R438 AVR |
| Manufacturer Part Number | R438 AVR |
| OEM Part Number | R438 AVR |

## Images

![R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty - Image 1](https://m.media-amazon.com/images/I/61H1WYdArbL.jpg)
![R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty - Image 2](https://m.media-amazon.com/images/I/61Tr5BSM4xL.jpg)
![R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty - Image 3](https://m.media-amazon.com/images/I/61zuUPTQ4hL.jpg)
![R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty - Image 4](https://m.media-amazon.com/images/I/51WSSrETt4L.jpg)
![R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty - Image 5](https://m.media-amazon.com/images/I/51iBitlWr+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good regulator
*by A***D on February 5, 2026*

Oem no longer available. This worked and is used in a continuous application. I would buy again.

### ⭐⭐⭐⭐⭐ Excellent
*by F***I on December 15, 2019*

Excellent

## Frequently Bought Together

- R438 AVR - Automatic Voltage Regulator - Exact Generic Replacement | Voltage 95-480V AC | 2 Year Warranty
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**Shop now:** [https://www.desertcart.mx/products/83005080-r438-avr-automatic-voltage-regulator-exact-generic-replacement-voltage-95](https://www.desertcart.mx/products/83005080-r438-avr-automatic-voltage-regulator-exact-generic-replacement-voltage-95)

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*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-03-10*