--- product_id: 218957945 title: "Rectifier Diode 5Pcs 70HFR120 5Pcs 70HF120 Spiral Rectifier Module Forward/Reverse Polarity Rectifier for Charging Batteries and Converter" brand: "walfront" price: "€ 32.23" currency: EUR in_stock: true reviews_count: 13 category: "Walfront" url: https://www.desertcart.pt/products/218957945-rectifier-diode-5pcs-70hfr120-5pcs-70hf120-spiral-rectifier-module-forward store_origin: PT region: Portugal --- # 70A high current capacity Forward/reverse polarity support Stud-mounted for quick install Rectifier Diode 5Pcs 70HFR120 5Pcs 70HF120 Spiral Rectifier Module Forward/Reverse Polarity Rectifier for Charging Batteries and Converter **Brand:** walfront **Price:** € 32.23 **Availability:** ✅ In Stock ## Summary > ⚡ Charge smarter, not harder — power your projects with precision! ## Quick Answers - **What is this?** Rectifier Diode 5Pcs 70HFR120 5Pcs 70HF120 Spiral Rectifier Module Forward/Reverse Polarity Rectifier for Charging Batteries and Converter by walfront - **How much does it cost?** € 32.23 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/218957945-rectifier-diode-5pcs-70hfr120-5pcs-70hf120-spiral-rectifier-module-forward) ## Best For - walfront enthusiasts ## Why This Product - Trusted walfront brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Pack Advantage:** 5 pairs included—perfect for upgrades or replacements without delay. - • **Tool-Free Installation:** Stud-mounted chassis ensures a hassle-free, compact setup. - • **Universal Compatibility:** Ideal for battery charging, converters, and power supply systems. - • **Dual Polarity Flexibility:** Supports forward and reverse polarity for versatile applications. - • **Power Through with 70A Current:** Handles heavy-duty charging and conversion effortlessly. ## Overview The Rectifier Diode 5Pcs 70HFR120/70HF120 module delivers robust 70A current handling with durable stud-mounted design for easy installation. Supporting both forward and reverse polarity, this 5-pair pack is engineered for reliable battery charging, converters, and power supply applications—trusted by professionals upgrading automotive and welding equipment alike. ## Description Buy Rectifier Diode 5Pcs 70HFR120 5Pcs 70HF120 Spiral Rectifier Module Forward/Reverse Polarity Rectifier for Charging Batteries and Converter: Rectifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Works great for a 12v lithium battery swap in a car - I use this diode to create a voltage drop of about 0.5V to 1.1V both ways. The lithium battery bms doesn't allow charging over 14.7v, and cuts off the battery. The car charger doesn't know its charging a lithium battery, so it charges it at the full 14.7V. Using one forward, and one reverse diode in parallel on the positive terminal, I guarantee that the bms doesn't cut off, the battery gets charged at a lower voltage (not to 100% where longevity is affected). At the same time, the car I use is a hybrid, so the battery only provides up to 50 amps to the car. The diodes seem to handle it just fine. The charging current is between 5 and 15 amps. The car doesn't even realize the battery chemistry is changed, and it works flawless. Review: Great for Welder upgrade! - Perfect choice! I used these to upgrade my burnt up rectifier on my Harbor Freight Welder. Best thing I ever did! ## Features - GOOD PERFORMANCE-- The rectifier diode has high current capability, meet your basic demand - WITH STUDS FOR EASY INSTALLATION-- The chassis is mounted with studs, it has compact size and simple construction, easy to install - Rectifier Diode adopts material, which can make sure the durability and stability of the product - 5 PAIRS-- There are total 5 pairs Rectifiers in one package, they are great replacements for the old or damaged ones. - WIDE APPLICATION-- Rectifier can be widely used for charging batteries, converter and power supply ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B083V1QP4L | | Best Sellers Rank | #519,757 in Automotive ( See Top 100 in Automotive ) #23 in Automotive Replacement Alternator Rectifiers | | Date First Available | January 15, 2020 | | Item Weight | 6.3 ounces | | Item model number | WALFRONTzmv68b1auo | | Manufacturer | Walfront | ## Images ![Rectifier Diode 5Pcs 70HFR120 5Pcs 70HF120 Spiral Rectifier Module Forward/Reverse Polarity Rectifier for Charging Batteries and Converter - Image 1](https://m.media-amazon.com/images/I/417+VM+WgpL.jpg) ## Questions & Answers **Q: I have an ol Schumacher 10/30 200 amp battery charger and one of the rectifiers on the heat sink plate has the ear broken off. What size replacement r** A: You will need a bit more information. Some diodes have the body (the case that bolts to the heat sink) as the negative side while others have the case as positive. So you will need some form of a part number to find that out. Once you have that you can call Mosure Electronics and ask to speak to a component specialist. They should be able to supply you with a replacement. I hope this helps. **Q: Hola, los quiero para poner unas baterias de coche en paralelo con cargador solar inteligente, me pueden servir, gracias.** A: Lo siento, no. **Q: At what amp rating does this diode need passive or active cooling?** A: I replaced the diodes in my 180 amp welder and they work well with no heat issues. Sorry no specific numbers. **Q: Is there a voltage drop chart available?** A: Not one that comes with it. You could go to some website like Mousure Electronics and they should have a spec sheet on it. I suspect it will either be .2 volt or .6 volts depending upon its composition. I use these to replace the cutout relay in old cars. I hope this helps. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great for a 12v lithium battery swap in a car *by H***B on February 25, 2023* I use this diode to create a voltage drop of about 0.5V to 1.1V both ways. The lithium battery bms doesn't allow charging over 14.7v, and cuts off the battery. The car charger doesn't know its charging a lithium battery, so it charges it at the full 14.7V. Using one forward, and one reverse diode in parallel on the positive terminal, I guarantee that the bms doesn't cut off, the battery gets charged at a lower voltage (not to 100% where longevity is affected). At the same time, the car I use is a hybrid, so the battery only provides up to 50 amps to the car. The diodes seem to handle it just fine. The charging current is between 5 and 15 amps. The car doesn't even realize the battery chemistry is changed, and it works flawless. ### ⭐⭐⭐⭐⭐ Great for Welder upgrade! *by G***N on March 18, 2026* Perfect choice! I used these to upgrade my burnt up rectifier on my Harbor Freight Welder. Best thing I ever did! ### ⭐⭐⭐⭐⭐ Great product *by M***D on March 22, 2025* Great choice for me. I fixed by them my battery charger. It’s work very nice better than the factory. --- ## 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/218957945-rectifier-diode-5pcs-70hfr120-5pcs-70hf120-spiral-rectifier-module-forward](https://www.desertcart.pt/products/218957945-rectifier-diode-5pcs-70hfr120-5pcs-70hf120-spiral-rectifier-module-forward) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-17*