--- product_id: 264101484 title: "Blue Sea Systems - Battery Switch ON/Off AFD" brand: "blue sea systems" price: "€ 112.00" currency: EUR in_stock: false reviews_count: 7 category: "Blue Sea Systems" url: https://www.desertcart.es/products/264101484-blue-sea-systems-battery-switch-on-off-afd store_origin: ES region: Spain --- # 48V DC max voltage IP66 waterproof protection 350A continuous rating Blue Sea Systems - Battery Switch ON/Off AFD **Brand:** blue sea systems **Price:** € 112.00 **Availability:** ❌ Out of Stock ## Summary > 🔌 Command your power with confidence – switch on the future! ## Quick Answers - **What is this?** Blue Sea Systems - Battery Switch ON/Off AFD by blue sea systems - **How much does it cost?** € 112.00 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/264101484-blue-sea-systems-battery-switch-on-off-afd) ## Best For - blue sea systems enthusiasts ## Why This Product - Trusted blue sea systems brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Certified Safety:** Meets ISO 8846 and ABYC standards, ensuring top-tier marine electrical compliance - • **Precision Control:** Single circuit ON/OFF switch with stainless steel contacts for flawless operation - • **Seamless Integration:** Flush or surface mount options with 3/8"-16 terminal studs for versatile installation - • **Powerhouse Performance:** Handles a robust 350A continuous current for reliable energy flow - • **Marine-Grade Durability:** IP66 waterproof and ignition protected for safe use on gasoline-powered boats ## Overview The Blue Sea Systems Battery Switch ON/Off AFD is a high-performance, marine-grade battery switch designed for single circuit control. Rated for 350A continuous current and up to 48V DC, it features IP66 waterproofing and ignition protection, meeting ISO 8846 and ABYC standards. Its durable stainless steel contacts and versatile mounting options make it the trusted choice for professional-grade marine electrical systems. ## Description BLUE SEA SWITCH BATTERY E ON/OFF : Blue Sea Systems: desertcart.ae: Sporting Goods Review: Great - Quality switch Review: مفتاح التشخيل الاحادي - ممتاز انصح به ## Features - Single Circuit ON-OFF. Switches a single battery to a single load group - Ignition protected—safe for installation aboard gasoline powered boats - IP66 waterproof, ISO 8846 and meets ABYC requirements - Terminal Stud Size: 3/8" - 16 - Continuous rating: 350A, Maximum voltage: 48V DC ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000MMC914 | | Actuator Type | Push Button | | Brand Name | Blue Sea Systems | | Circuit Type | 1-way | | Color | Red | | Connectivity Protocol | X-10 | | Connector Type | Idc | | Contact Material | Stainless Steel | | Contact Type | Normally Open | | Control Method | Touch | | Controller Type | Ring | | Current Rating | 1 Microamps | | Customer Reviews | 4.7 4.7 out of 5 stars (2,952) | | Global Trade Identification Number | 00632085900359 | | Included Components | Great Product | | International Protection Rating | IP66 | | Item Dimensions | 7.4 x 16.2 x 21.9 centimeters | | Item Type Name | Great Product | | Item Weight | 0.59 Kilograms | | Lower Temperature Rating | 1 Degrees Celsius | | Manufacturer | BLUE SEA SYSTEMS | | Material Type | Plastic | | Model | 9003e | | Mounting Type | Flush-mounted or surface mounted | | Number of Items | 1 | | Number of Positions | 2 | | Operating Voltage | 48 Volts | | Operation Mode | ON-OFF-ON | | Specification Met | ABYC, ISO 8846, IP66 | | Switch Type | On-Off | | Terminal | Stud | | UPC | 632085900359 | | Unit Count | 1 Count | | Upper Temperature Rating | 1 Degrees Fahrenheit | | Warranty Description | LIMITED WARRANTY | | Wattage | 16800 watts | ## Product Details - **Connector type:** Idc - **Contact type:** Normally Open - **Current rating:** 1 Microamps - **Operating voltage:** 48 Volts - **Operation mode:** ON-OFF-ON ## Images ![Blue Sea Systems - Battery Switch ON/Off AFD - Image 1](https://m.media-amazon.com/images/I/81oD4fs1tCL.jpg) ![Blue Sea Systems - Battery Switch ON/Off AFD - Image 2](https://m.media-amazon.com/images/I/71z8utETJ2L.jpg) ![Blue Sea Systems - Battery Switch ON/Off AFD - Image 3](https://m.media-amazon.com/images/I/51tvx4OvJML.jpg) ![Blue Sea Systems - Battery Switch ON/Off AFD - Image 4](https://m.media-amazon.com/images/I/51zM3e8DqxL.jpg) ![Blue Sea Systems - Battery Switch ON/Off AFD - Image 5](https://m.media-amazon.com/images/I/41Br+QfuncL.jpg) ## Available Options This product comes in different **Pattern, Style** options. ## Questions & Answers **Q: I'm considering using this as a battery isolator for a winch on my Jeep. Can it handle the current? and what are the physical dimensions?** A: Your winch maker will list amperage for various amounts of load. Also switches will show three amperages they can tolerate for different amounts of time. So this switch is rated for 350 amps "continuous" (ie on for hours or permanently) 600 amps "intermittent" (for five minutes according to specs), and 1,200 amps "cranking"/peak for 30 seconds. OK so my SmittyBilt 9500 XRC Generation 3 winch has the following draws: 80 amps pulling zero lbs (winding rope in), 160 amps pulling 2,000 lbs, 220 amps pulling 4,000 lbs, 280 amps pulling 6,000, 340 amps pulling 8,000 lbs, and 385 amps pulling maximum of 9,500 lbs. H20 smitty and Second Gen XRC smitty use about 10% more amps. Also you "should" have a safety margin of 20%, ie no more than 80%. Now that means switch is ok continious running my winch are 2/3 of max load, and switch is fine running extreme max of winch load five minutes, five minutes rest, five minutes run, etc. BUT if you are anywhere over 50% of winch capacity/load you are going to run winch five minutes and rest the winch for five minutes anyway. so if your numbers are like mine you are ok. Check your winch makers specs on their website. Look until you find all numbers for the range of loads since the basic single amperage number they will list will be about 60% of max. I would say 90% of up to 12,000 lb winches are ok with this switch. But that presupposes you have at least read up on winching and know that you will damage your winch if you pull at max for more than four or five minutes. goodluck. PS blue sea's web page lists the contentious, intermittent five minutes and peak 20 seconds for all its switches. The other red "m" model is 300 continuous, this "E" is 350 continuous, and the gray one is 600, 900,1750 **Q: where can I get wiring instructions with diagram?** A: You tube has a few I found helpful. **Q: Package says it’s compatible with up to 4/0 awg. my batter bank is 200a lithium tuning through 2/0 awg wire to my bus bar. will this switch work?** A: It is compatible with any wire that fits the terminals. AWG 4, 2, or 0. The important thing is the current and voltage. At 48 volts this switch should be good at 233 amps continuously. Here is my complete review: Fabulous switch. I have mine on my golf car and switch between two 48 volt battery banks; It is specified at Continuous rating: 350A, Maximum voltage: 32V DC. Doing the math: Power = Current x Voltage. Thus, 350 x 32 = 11,200 Watts that this switch can handle. So, 11,200 / 48 = 233 Amps continuous ... at 48 volts this switch should be good at 233 amps continuously. see less **Q: What is alternator field disconnect vs the regular product without AFD? Looking to use on a camp trailer.** A: You do not need afd on a trailer, only on a vehicle with an alternator such as a motorhome or boat. It protects the alternator diodes upon disconnect. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great *by B***R on 17 November 2023* Quality switch ### ⭐⭐⭐⭐⭐ مفتاح التشخيل الاحادي *by H***L on 27 June 2023* ممتاز انصح به ### ⭐⭐⭐⭐⭐ Review *by P***A on 16 August 2024* Used this and a pile of 4G cables to create a house bank and engine bank on my boat. Works good. ## Frequently Bought Together - Blue Sea Systems 9003E e-Series Battery Switch, On/Off, Red - Blue Sea Systems 5026 ST Blade Fuse Block 12 Circuit with Ground and Cover - 16 Gauge Marine Wire 16 AWG Marine Grade Wire Include 16AWG 120FT Red & 120FT Black,16 Gauge Tinned Copper Electrical Cable for Boat Automotive Speakers Lighting Solar Outdoor RV Camper Trailer --- ## 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.es/products/264101484-blue-sea-systems-battery-switch-on-off-afd](https://www.desertcart.es/products/264101484-blue-sea-systems-battery-switch-on-off-afd) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-04-22*