--- product_id: 269370253 title: "Blue Sea Systems Terminal Fuses" brand: "blue sea systems" price: "217 zł" currency: PLN in_stock: true reviews_count: 5 category: "Blue Sea Systems" url: https://www.desertcart.pl/products/269370253-blue-sea-systems-terminal-fuses store_origin: PL region: Poland --- # 200A high current rating IP66 water jet protection Visible blown fuse indicator Blue Sea Systems Terminal Fuses **Brand:** blue sea systems **Price:** 217 zł **Availability:** ✅ In Stock ## Summary > ⚡ Protect your power like a pro—because safety isn’t optional. ## Quick Answers - **What is this?** Blue Sea Systems Terminal Fuses by blue sea systems - **How much does it cost?** 217 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/269370253-blue-sea-systems-terminal-fuses) ## 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 - • **Seamless Integration:** Compatible exclusively with Blue Sea Terminal Fuse Blocks (PN 5191 & PN 2151) for secure, professional installations. - • **Instant Fault Detection:** Visible blown fuse indicator lets you quickly identify and resolve issues, minimizing downtime. - • **Ignition-Protected Design:** Certified safe for gasoline-powered boats, giving you peace of mind in volatile environments. - • **Unmatched Safety Assurance:** 200A terminal fuse with 10,000 AIC rating ensures top-tier protection for your high-capacity battery banks. - • **Built for Harsh Environments:** IP66 rating means this fuse withstands powerful water jets—perfect for marine and outdoor applications. ## Overview The Blue Sea Systems Terminal Fuse 200A is a premium, ignition-protected fuse designed for high-current DC circuits up to 58V. With a robust 10,000 AIC rating at 14V DC and IP66 water jet protection, it safeguards large battery banks in marine and industrial settings. Featuring a visible blown fuse indicator and compatibility with specific Blue Sea fuse blocks, it delivers reliable, professional-grade circuit protection trusted by experts. ## Description Fuse, MRBF, 200 Amp, MFG# 5187, MRBF Battery Terminal fuse, 10K Amp interrupt (14V), 58 VDFC Max, .9"W x 1.1"H x .64"D. Fits 5191 & 2151 fuse blocks. Review: This is a great product. Many complain about the price. But it’s a critical safety measure for life and property safety so is $80 for a fuse and holder worth getting versus some cheap Chinese thing that if the absolute worst happens (internal battery failure/ thermal runaway conditions) you want to bet your life and/or home on? Yes we have other safety devices, BMSs etc…but if you don’t plan for the worst (highly unlikely) scenario then you’re a gambler. IMHO Remember the AIC rating is super important in fuses. That’s what going to prevent an arc from forming and allowing massive current to flow not to mention it can act as an ignition source for the hydrogen gas LifePo4 batteries vent. No arc less chance of fire. With these terminal fuses keep in mind the AIC drops as your pack voltage goes up from 12v to 24/48v. I build both. The picture is of a 16s 48v LFP pack. The terminal fuse is 3rd or 4th in line of safety measures right from the start. It doesn’t have the AIC @48v to handle a serious failure, hence it’s just a part of the safety system. #1 a must - class T fuse with an AIC rating of at least 20k connected directly to the battery main positive. If you can find a 50K AIC even better. #2 BMS - great when they work but even the highest quality ones can fail you. Not something to depend on solely. #3 DC breaker - this is a cheap junk Chinese breaker that I have zero trust in. For me it’s merely a cutoff switch to the terminals. It came as part of the metal enclosure kit. I can’t find a quality breaker that fits in there unfortunately. #4 These terminal fuses. Fan to vent gas from the case with a VOC sensor I built to alert me if hydrogen gas is being vented. Also added temperature sensors on various parts of the metal case to alert me (also connected to a microcontroller I built). I changed the default settings on the BMS for short circuit amps to a much much lower numbers same with temperature settings. Since my packs pull very minuscule amount of power I’ll never come close to the 100a the bms/pack is rated for. From there it’s again a series of disconnect switches, class T fuses to the inverter. For my “worst case scenario nothing stopped an internal failure” I have CellBlockEX pellets to pour on top of the box. I also have a Lifepo4 designed fire extinguisher (yes they are different due to the LFP chemistry and the ability of LFP batteries to self ignite since they produce all the elements needed for fire on their own. I also have canisters of Stat-X First Responder Aerosol Fire Suppression to toss at a fire and run away. Is this all overkill many would say yes. I would ask that same question to them if they skimped out on parts and lost property or god forbid life. I bet I would get a different answer then. Be safe folks. While super rare, you better have measures in place to deal with the super rare possibilities. Or like I said maybe you’re a gambler. Up to you what you need to feel safe and sleep at night. Class T fuses need to be in place sometimes a lot depends on your setup. Blue sea systems gets an A+ from me. I know you are paying more for the name but I’m ok with it. YMMV! Happy DIYing! Free energy from the sun!! Review: Still going strong ## Features - Pack of 1, 200A terminal fuse, Max voltage: 58V DC - Visible indication of blown condition - 10,000 AIC at 14V DC satisfies ABYC requirements for DC Main circuit protection on large battery banks - Requires the use of Terminal Fuse Blocks PN 5191 or PN 2151—do not mount the fuse directly to the battery terminal - Ignition protected—safe for installation aboard gasoline powered boats. IP66 - Protected against powerful water jets ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B001E4F3J4 | | Batteries Included? | No | | Best Sellers Rank | #16,485 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #25 in Fuses & Holders | | Brand | Blue Sea Systems | | Color | blue/sea | | Customer Reviews | 4.8 4.8 out of 5 stars (899) | | Date First Available | 6 August 2012 | | Department | mens | | Included Components | Fuse | | Is Discontinued By Manufacturer | No | | Item model number | 5187 | | Length | 4.38 inches | | Manufacturer | Blue Sea Systems | | Material Type | Metal, Plastic | | Number of Items | 1 | | Product Dimensions | 10.16 x 7.62 x 2.54 cm; 22.68 g | | Size | 200 Amp | | Style | 200a | | Weight | 0.1 Pounds | | Width | 2.69 inches | | connector-type | Screw | ## Product Details - **AC adapter current:** 200 Amps - **Brand:** Blue Sea Systems - **Item dimensions L x W x H:** 10.2 x 7.6 x 2.5 centimeters - **Material:** Metal, Plastic - **Voltage:** 58 Volts ## Images ![Blue Sea Systems Terminal Fuses - Image 1](https://m.media-amazon.com/images/I/51I86JdZ70S.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by F***D on 24 May 2024* This is a great product. Many complain about the price. But it’s a critical safety measure for life and property safety so is $80 for a fuse and holder worth getting versus some cheap Chinese thing that if the absolute worst happens (internal battery failure/ thermal runaway conditions) you want to bet your life and/or home on? Yes we have other safety devices, BMSs etc…but if you don’t plan for the worst (highly unlikely) scenario then you’re a gambler. IMHO Remember the AIC rating is super important in fuses. That’s what going to prevent an arc from forming and allowing massive current to flow not to mention it can act as an ignition source for the hydrogen gas LifePo4 batteries vent. No arc less chance of fire. With these terminal fuses keep in mind the AIC drops as your pack voltage goes up from 12v to 24/48v. I build both. The picture is of a 16s 48v LFP pack. The terminal fuse is 3rd or 4th in line of safety measures right from the start. It doesn’t have the AIC @48v to handle a serious failure, hence it’s just a part of the safety system. #1 a must - class T fuse with an AIC rating of at least 20k connected directly to the battery main positive. If you can find a 50K AIC even better. #2 BMS - great when they work but even the highest quality ones can fail you. Not something to depend on solely. #3 DC breaker - this is a cheap junk Chinese breaker that I have zero trust in. For me it’s merely a cutoff switch to the terminals. It came as part of the metal enclosure kit. I can’t find a quality breaker that fits in there unfortunately. #4 These terminal fuses. Fan to vent gas from the case with a VOC sensor I built to alert me if hydrogen gas is being vented. Also added temperature sensors on various parts of the metal case to alert me (also connected to a microcontroller I built). I changed the default settings on the BMS for short circuit amps to a much much lower numbers same with temperature settings. Since my packs pull very minuscule amount of power I’ll never come close to the 100a the bms/pack is rated for. From there it’s again a series of disconnect switches, class T fuses to the inverter. For my “worst case scenario nothing stopped an internal failure” I have CellBlockEX pellets to pour on top of the box. I also have a Lifepo4 designed fire extinguisher (yes they are different due to the LFP chemistry and the ability of LFP batteries to self ignite since they produce all the elements needed for fire on their own. I also have canisters of Stat-X First Responder Aerosol Fire Suppression to toss at a fire and run away. Is this all overkill many would say yes. I would ask that same question to them if they skimped out on parts and lost property or god forbid life. I bet I would get a different answer then. Be safe folks. While super rare, you better have measures in place to deal with the super rare possibilities. Or like I said maybe you’re a gambler. Up to you what you need to feel safe and sleep at night. Class T fuses need to be in place sometimes a lot depends on your setup. Blue sea systems gets an A+ from me. I know you are paying more for the name but I’m ok with it. YMMV! Happy DIYing! Free energy from the sun!! ### ⭐⭐⭐⭐⭐ Review *by K***S on 24 November 2025* Still going strong ### ⭐⭐⭐⭐⭐ Review *by T***E on 9 August 2025* Quality fuse, received as described. Thank you. ## Frequently Bought Together - Blue Sea Systems Terminal Fuses - Blue Sea Systems MRBF Terminal Fuse Blocks --- ## 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.pl/products/269370253-blue-sea-systems-terminal-fuses](https://www.desertcart.pl/products/269370253-blue-sea-systems-terminal-fuses) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-01*