--- product_id: 65447756 title: "MDQ-300A" brand: "baomain" price: "€ 62.50" currency: EUR in_stock: true reviews_count: 8 category: "Baomain" url: https://www.desertcart.pt/products/65447756-mdq-300a store_origin: PT region: Portugal --- # 300A max current 1600V peak voltage Isolated mounting base MDQ-300A **Brand:** baomain **Price:** € 62.50 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with industrial strength and flawless efficiency! ## Quick Answers - **What is this?** MDQ-300A by baomain - **How much does it cost?** € 62.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/65447756-mdq-300a) ## Best For - baomain enthusiasts ## Why This Product - Trusted baomain brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Full-Wave Efficiency:** Four-diode bridge ensures smooth, stable AC to DC conversion with minimal energy loss. - • **Built for Reliability:** Isolated base and glass passivation tech deliver superior safety and long-lasting performance. - • **Peak Voltage Resilience:** Withstands up to 1600V repetitive peak reverse voltage for ultimate durability. - • **Plug & Play Integration:** Compact 108x67x35mm size with standard mounting holes for seamless industrial cabinet fit. - • **Industrial-Grade Power Handling:** Handles a massive 300A continuous current for heavy-duty applications. ## Overview The BAOMAIN MDQ-300A Bridge Rectifier is a robust single-phase full-wave diode module designed for professional industrial AC to DC conversion. Supporting up to 300A continuous current and 1600V peak voltage, it features an isolated mounting base and advanced glass passivation for enhanced safety and durability. Its compact, standardized design ensures easy integration into motor controls, PWM converters, and power supply systems, making it a must-have for high-performance electrical setups. ## Description Baomain MDQ-300A Industrial Single Phase Bridge Rectifier (300A 1600V) The Baomain MDQ-300A is a heavy-duty single-phase bridge rectifier designed for professional-grade AC to DC power conversion. Featuring a robust four-diode bridge configuration, this module provides stable full-wave rectification for high-power electrical systems, ensuring maximum efficiency and reliability in industrial environments. Technical Specifications:Model: MDQ-300AMax. Average Forward Rectified Current: 300ARepetitive Peak Reverse Voltage (VRRM): 1600VPhase: Single PhaseConfiguration: 4-Diode Bridge for Full-Wave RectificationTerminals: 4 Heavy-Duty Screw TerminalsModule Dimensions: 108 x 67 x 35mm (4.25" x 2.64" x 1.6")Mounting Hole Diameter: 6.5mm (0.26")Mounting Hole Distance: 87mm (3.42")Net Weight: 526gCore Features:Superior Protection & High Reliability: Engineered with unique glass passivation technology, this module offers exceptional stability and resistance to moisture and oxidation for a significantly longer service life.Isolated Mounting Base: Features an electrically isolated base for enhanced safety during high-voltage installations, paired with a robust metal casing designed for optimal heat transfer.Efficient Power Conversion: The standardized bridge circuit configuration minimizes energy loss and voltage drops, making it ideal for continuous industrial duty cycles.Standardized Industrial Build: Precision dimensions and mounting hole specifications allow for easy integration or replacement in existing power cabinets and CNC control panels.Typical Applications:This versatile power module is engineered for a wide range of DC power supply requirements, including:DC Power Supplies: Ideal for industrial instrument equipment and high-current battery charging systems.Motor Control: Perfect for DC motor excitation power supplies and input rectification for PWM frequency converters.Power Conversion: Widely used in switch power supplies, auxiliary current inverters, and automated manufacturing systems.Note: To maintain component longevity and prevent overheating during high-current operation, the use of an appropriately sized heat sink and thermal grease is mandatory. Review: Works good on my Lincoln 225 Arc Welder - Used this to convert a Lincoln 225 welder (aka tombstone welder). Works good. Welds are smoother. Review: Works good, makes my ac welder into a smooth running dc welder - A very good bridge at a bargain price ## Features - 【High Capacity 300A 1600V】 Engineered for heavy-duty industrial performance, the MDQ-300A bridge rectifier supports a maximum average forward rectified current of 300A and a repetitive peak reverse voltage of 1600V - 【Full Wave Single Phase Efficiency】 This full bridge rectifier features a high-efficiency configuration with four diodes connected in a single-phase bridge setup, providing stable and reliable power conversion for instrument equipment - 【Superior Isolation & Reliability】 Built with an isolated mounting base and unique glass passivation technology, this diode module rectifier ensures high reliability and enhanced safety during high-power operations - 【Universal Industrial Applications】 Versatile enough for DC motor excitation, PWM frequency converter inputs, and switch power supply auxiliaries, making it an essential rectifier bridge for various electrical systems - 【Precision Dimensions & Easy Install】 Compact footprint at 108 x 67 x 35mm (4.25" x 2.64" x 1.6") with standard 87mm mounting hole distance, allowing for seamless integration into existing industrial cabinets and hardware setups ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CH9NN59 | | Best Sellers Rank | #64,328 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #42 in Radio Frequency Transceivers | | Brand | Baomain | | Customer Reviews | 4.4 out of 5 stars 55 Reviews | | Input Voltage | 1600 volts_of_alternating_current | | Manufacturer | Baomain Electric Co.,Ltd | | Mfr Part Number | MDQ-300A | | Model Number | MDQ-300A | | Number of Items | 1 | | Number of Packs | 1 | | Power Source | AC adapter | | UPC | 711811435850 | | Unit Count | 1 Count | ## Images ![MDQ-300A - Image 1](https://m.media-amazon.com/images/I/61sdZbPYjzL.jpg) ![MDQ-300A - Image 2](https://m.media-amazon.com/images/I/61F2FChdzqL.jpg) ![MDQ-300A - Image 3](https://m.media-amazon.com/images/I/61JeXOXu1nL.jpg) ![MDQ-300A - Image 4](https://m.media-amazon.com/images/I/61otFwabXUL.jpg) ![MDQ-300A - Image 5](https://m.media-amazon.com/images/I/61cKmTVPKwL.jpg) ## Available Options This product comes in different **Model** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works good on my Lincoln 225 Arc Welder *by P***E on July 13, 2026* Used this to convert a Lincoln 225 welder (aka tombstone welder). Works good. Welds are smoother. ### ⭐⭐⭐⭐⭐ Works good, makes my ac welder into a smooth running dc welder *by B***M on June 22, 2026* A very good bridge at a bargain price ### ⭐⭐⭐⭐⭐ Works great to convert older AC buzzbox welders to DC *by S***5 on August 23, 2023* I bought this BR to convert my older Century AC “BuzzBox” welder to DC, as other buyers have done & as shown on several YouTube videos. I chose to retain the AC welding connections and tied the bridge rectifier into the existing system using new 2-gauge welding cable and adhesive-type heat shrink. It works! And it works great! Really makes welding with 7018 rod a breeze (cleaner welds, easier to keep burning rods, less splatter, less current required). Keep in mind that for clean 7018 welding, you will need to use a POSITIVE ground; this didn’t work so well for me with 6011 so I switched back to Negative ground for 6011 and it worked great that way. I installed Riverweld Tig-welding plugs/connectors so I can easily switch between Positive/Negative ground depending upon which type of rod I am using. Very happy with this Bridge Rectifier! --- ## 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.pt/products/65447756-mdq-300a](https://www.desertcart.pt/products/65447756-mdq-300a) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-08-24*