--- product_id: 114237986 title: "R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty!" brand: "thunder parts" price: "HK$1317" currency: HKD in_stock: true reviews_count: 2 category: "Thunder Parts" url: https://www.desertcart.hk/products/114237986-r448-avr-for-leroy-somer-automatic-voltage-regulator-exact-generic store_origin: HK region: Hong Kong --- # 10A overload current, 10s protection Voltage sensing across 110V, 220V, 380V taps Built-in electronic overload & short circuit protection R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! **Brand:** thunder parts **Price:** HK$1317 **Availability:** ✅ In Stock ## Summary > ⚡ Power up with confidence — the smart regulator your generator deserves! ## Quick Answers - **What is this?** R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! by thunder parts - **How much does it cost?** HK$1317 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/114237986-r448-avr-for-leroy-somer-automatic-voltage-regulator-exact-generic) ## Best For - thunder parts enthusiasts ## Why This Product - Trusted thunder parts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Integrated Safety Fuses:** Power input protected by fuses to prevent damage and downtime - • **Robust Overload Defense:** Automatically reduces excitation current after 10A overload for 10 seconds to protect your generator - • **Reliable 2-Year Warranty:** Confidence backed by a full two-year warranty for peace of mind - • **Precision Voltage Control:** Exact generic replacement for R448 ensures seamless fit and performance - • **Wide Voltage Compatibility:** Supports multiple input voltage taps (110V, 220V, 380V) for versatile applications ## Overview The R448 AVR by Thunder Parts is a high-precision automatic voltage regulator designed as an exact generic replacement for the Leroy Somer R448 model. Featuring robust electronic protections against overloads, short circuits, and sensing loss, it supports multiple voltage inputs (110V, 220V, 380V) and automatically manages excitation current to safeguard your generator. Backed by a 2-year warranty and integrated fuse protection, this regulator ensures reliable, long-lasting performance for professional-grade power management. ## Description Buy R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty!: Voltage Regulators - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Worked well - Worked very well in generator FG Wilson Review: Buen vendedor - Buen producto ## Features - Exact Generic Replacement for R448 | 2 Year Warranty! Normal AVR supply power:2 auxiliary windings (X1, X2, ans Z, Z2) - Shunt supply: 150V - 5060Hz Rated overload current:10A, 10s. - Electronic built- in )overload, short circuit, and loss of sensing) protecting: If excitation current raises over 10 amps for more then 10 seconds, excitation current will drop automatically to about 1A. - To reset AVR protection, the generator must be stopped )or by cutting supply voltage to the AVR). Protection of power inputs by fuses F1 - Voltage sensing: 5VA insulated transformer with input voltage taps at: Terminals 0 - 110V = 95 to 140V. Terminals 0 - 220V = 170 to 260V. Terminals 0 - 380V = 340 to 520V ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07LFCPGT6 | | Best Sellers Rank | #1,987,506 in Automotive ( See Top 100 in Automotive ) #852 in Automotive Replacement Alternator Voltage Regulators | | Brand | Thunder Parts | | Brand Name | Thunder Parts | | Color | Black | | Customer Reviews | 4.1 out of 5 stars 9 Reviews | | Manufacturer | Thunder Parts | | Material | Plastic | Metal | | Material Type | Plastic | Metal | | Model | R448 AVR | | Part Number | R448 AVR | | UPC | 194031263685 | | Unit Count | 1 Count | ## Product Details - **Brand:** Thunder Parts - **Color:** Black - **Material:** Plastic | Metal - **UPC:** 194031263685 - **Unit Count:** 1 Count ## Images ![R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Image 1](https://m.media-amazon.com/images/I/61We4v+ycdL.jpg) ![R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Image 2](https://m.media-amazon.com/images/I/51GET1BclTL.jpg) ![R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Image 3](https://m.media-amazon.com/images/I/51Ahh9gTfSL.jpg) ![R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Image 4](https://m.media-amazon.com/images/I/51EI1wwfl6L.jpg) ![R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Image 5](https://m.media-amazon.com/images/I/61PjDeBqa-L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked well *by R***R on February 27, 2025* Worked very well in generator FG Wilson ### ⭐⭐⭐⭐⭐ Buen vendedor *by E***O on May 29, 2024* Buen producto ## Frequently Bought Together - R448 AVR for Leroy Somer | Automatic Voltage Regulator | Exact Generic Replacement for R448 | 2 Year Warranty! - Thunder Parts | AS440 | Generic Replacement for Cummins AS440 Automatic Voltage Regulator | 2 Year Warranty - DEVMO AVR SX460 Automatic Voltage Regulator Control Models Accessories Compatible with Stamford Generator Genset --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/114237986-r448-avr-for-leroy-somer-automatic-voltage-regulator-exact-generic](https://www.desertcart.hk/products/114237986-r448-avr-for-leroy-somer-automatic-voltage-regulator-exact-generic) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-08-25*