--- product_id: 136974147 title: "12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module" brand: "envistia" price: "฿7199" currency: THB in_stock: true reviews_count: 13 category: "Envistia" url: https://www.desertcart.co.th/products/136974147-12v-to-3-3v-3a-step-down-waterproof-miniature-dc store_origin: TH region: Thailand --- # 3A max current output Fully waterproof sealed design Wide 8-24V input range 12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module **Brand:** envistia **Price:** ฿7199 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with precision and protection — anytime, anywhere! ## Quick Answers - **What is this?** 12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module by envistia - **How much does it cost?** ฿7199 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/136974147-12v-to-3-3v-3a-step-down-waterproof-miniature-dc) ## Best For - envistia enthusiasts ## Why This Product - Trusted envistia brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Reliable 3A Power Delivery:** Delivers a steady 3.3V output at up to 3 amps for demanding devices. - • **Built to Brave the Elements:** Fully sealed waterproof casing ensures durability in any environment. - • **Advanced Protection Circuitry:** Includes overload, over-current, and voltage protection for stable, worry-free performance. - • **Versatile Voltage Compatibility:** Operates seamlessly with input voltages from 8V to 24V, perfect for diverse setups. - • **Compact & Labelled for Easy Installation:** Miniature footprint with clearly marked inputs/outputs for quick, error-free wiring. ## Overview This 12V to 3.3V step-down DC-DC converter module efficiently transforms a wide input voltage range (8-24V) into a stable 3.3V output at up to 3 amps. Its compact, fully waterproof design and comprehensive protection features make it ideal for powering sensitive electronics in rugged or outdoor environments. Perfect for professionals seeking reliable, hassle-free power conversion with easy installation. ## Description Buy 12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module: Power Converters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Worked great for my application - Used this to step down the power for my Ring Alarm Retrofit Kit. The retrofit panel that connects your existing sensors from a legacy wired alarm system to use Ring Alarm only runs on battery, I quickly found out that the legacy wired motion sensors quickly drained the battery on the retrofit kit and the battery was dead in a little over a month. I purchased this and wired it to the 12v power that is providing power to the old alarm panel and connected the other to the positive side of the battery terminal in the retro fit kit, now I don't have to worry about a separate battery as there is still a 12v backup battery in the old alarm panel in case of a power outage. Review: My minnows thank me. - I use this buck regulator to drop the 12 Vdc from my trolling motor battery to 3 Vdc for the bubbler in my minnow bucket. Batteries don't last long in a bubbler. Two sets of batteries would pay for it and I will never run out of power for my bubbler and don't have to change batteries every day or so. Wire it in before the switch on the positive side and to the negative side of the motor and the switch will still work and you can still use batteries if 12 Vdc isn't available. I double sided taped it to the face of the bubbler and have a dc power jack for the regulator and a matching dc plug on the wire on a long enough wire with alligator clips to attach to the battery terminals. It is very portable. With batteries I can unplug the wire and use it bank fishing or with the wire and alligator clips I can use it on my (or even my buddy's) boat. ## Features - Converts a 12V input voltage (will operate with any input voltage from 8V to 24V) to 3.3V DC (+2% -10%) output at up to 3A - Up to 9W output power (3V at 3A) - Fully sealed and waterproof - Overload / over-current / over / low voltage protection, stable performance - The inputs and outputs are labeled on the sticker on top of the converter, the red and black wires are the + and - 12V input, and the red and yellow wires are the + and - 3V output. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PNWPLRY | | Best Sellers Rank | #249,789 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,021 in Power Converters | | Brand Name | Envistia | | Current Rating | 3 Amps | | Customer Reviews | 4.6 4.6 out of 5 stars (250) | | Item Dimensions D x W x H | 1.5"D x 1.06"W x 9.06"H | | Item Weight | 30 Grams | | Manufacturer | Chuangruifa | | Model | 3V 3A DC-DC Converter | | Mounting Type | Surface Mount | | Part Number | 3V 3A DC-DC Converter | | Power Source | Corded Electric | | Specification Met | FCC, UL | | UPC | 732387204855 | ## Product Details - **Brand:** Envistia - **Current Rating:** 3 Amps - **Mounting Type:** Surface Mount - **Power Source:** Corded Electric - **Product Dimensions:** 1.5"D x 1.06"W x 9.06"H ## Images ![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 1](https://m.media-amazon.com/images/I/61QiTvq2r4L.jpg) ## Questions & Answers **Q: What guage are the wires?** A: The manufacturer doesn't specify the wire gauge, but the wire conductor has a diameter of 1mm (0.04 inches), which would make it 18 AWG wire. **Q: is this a switching DC-DC converter (or linear converter)?** A: It's a switching converter. Power output at 3V is roughly equal to power input at 12V, so the input current is much lower than the output current. Minimal dissipation compared to a linear converter. **Q: So, if i have a device that takes 3v .225a, even though this outputs a max of 3a it should work fine?** A: Yes, absolutely. This module is voltage-regulated, meaning it regulates the output to 3V, and will provide whatever current the load draws, up to 3A maximum. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Worked great for my application *by J***. on March 14, 2025* Used this to step down the power for my Ring Alarm Retrofit Kit. The retrofit panel that connects your existing sensors from a legacy wired alarm system to use Ring Alarm only runs on battery, I quickly found out that the legacy wired motion sensors quickly drained the battery on the retrofit kit and the battery was dead in a little over a month. I purchased this and wired it to the 12v power that is providing power to the old alarm panel and connected the other to the positive side of the battery terminal in the retro fit kit, now I don't have to worry about a separate battery as there is still a 12v backup battery in the old alarm panel in case of a power outage. ### ⭐⭐⭐⭐⭐ My minnows thank me. *by A***Y on September 5, 2022* I use this buck regulator to drop the 12 Vdc from my trolling motor battery to 3 Vdc for the bubbler in my minnow bucket. Batteries don't last long in a bubbler. Two sets of batteries would pay for it and I will never run out of power for my bubbler and don't have to change batteries every day or so. Wire it in before the switch on the positive side and to the negative side of the motor and the switch will still work and you can still use batteries if 12 Vdc isn't available. I double sided taped it to the face of the bubbler and have a dc power jack for the regulator and a matching dc plug on the wire on a long enough wire with alligator clips to attach to the battery terminals. It is very portable. With batteries I can unplug the wire and use it bank fishing or with the wire and alligator clips I can use it on my (or even my buddy's) boat. ### ⭐⭐⭐⭐⭐ Perfect power source to my RV Thermostat, instead of 2 AA batteries. *by S***R on April 23, 2022* I replaced my RV thermostat with a wifi model, only problem was the new thermostat required 2 AA batteries, and they wouldn't even last a whole month. I got this 3V step down module, using the RV's 12volt power as the source, and bypassed the wifi thermostat batteries. Works perfectly, and now never have to change batteries. ## Frequently Bought Together - Envistia Mall 12V to 3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module by - HOMELYLIFE DC 12V 24V to DC 5V 3A 15W Step Down Buck Converter Voltage Regulator Reducer Power Converter Mini Module Transformer - DC 12V/24V to 5V 3A Step Down Converter - 12V Voltage Regulator Buck Converter Power Supply Transformer - 12V/24V to 5V 3A --- ## 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.co.th/products/136974147-12v-to-3-3v-3a-step-down-waterproof-miniature-dc](https://www.desertcart.co.th/products/136974147-12v-to-3-3v-3a-step-down-waterproof-miniature-dc) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-23*