{"product_id":"renogy-30a-mrbf-terminal-fuse-m8-bolt","title":"Renogy 30A MRBF Terminal Fuse with M8 Terminal Bolt","description":"\u003ch2\u003eShort Product Summary\u003c\/h2\u003e\u003cp\u003eA 30A MRBF terminal fuse that bolts directly onto a battery terminal or busbar, supplied with the M8 bolt you need to fit it. It puts the protection at the source of the current rather than somewhere down the cable, and takes up almost no space doing it.\u003c\/p\u003e\u003ch2\u003eWhy This Product\u003c\/h2\u003e\u003cp\u003eMRBF stands for marine rated battery fuse, and the design does one clever thing: instead of sitting in a holder in the middle of a cable run, it clamps straight onto the positive terminal stud with the cable lug on top of it. That means there is effectively zero unprotected cable. On a caravan or camper where the battery box is tight and every centimetre of cable is a compromise, that is worth a lot. It also removes an entire fuse holder, two extra joints and a length of cable from the build. At 30A this one suits a smaller circuit: a solar controller feed, a DC distribution branch, a water pump and lighting sub-circuit, or a monitoring and communication feed. It is rated to 58V, so it is equally at home on a 12V, 24V or 48V bus. Ceramic body, brass elements, and an interrupt rating high enough to safely clear a dead short on a lithium bank, which is not something every cheap blade fuse can claim.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounts directly to the battery terminal\u003c\/strong\u003e – eliminates unprotected cable between the post and the fuse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30A current rating\u003c\/strong\u003e – sized for controller feeds, DC distribution branches and lighting or pump sub-circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e58V voltage rating\u003c\/strong\u003e – works on 12V, 24V and 48V systems without changing part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh interrupt rating\u003c\/strong\u003e – 10,000A at 14VDC, 5,000A at 32VDC and 2,000A at 58VDC, enough to safely clear a lithium bank short.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramic insulating body\u003c\/strong\u003e – handles the heat of a clearing event without deforming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVery compact at 23.5 x 20 x 11.5 mm\u003c\/strong\u003e – fits inside a crowded battery box where a fuse holder will not.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM8 terminal bolt included\u003c\/strong\u003e – the fitting hardware is in the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoHS, UL and CE certified\u003c\/strong\u003e – built to recognised standards rather than to a price.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePairs with the Renogy 500A combiner box\u003c\/strong\u003e – drops straight onto the busbar in a combiner installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eIdeal For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eProtecting a solar charge controller feed at the battery terminal.\u003c\/li\u003e\n\u003cli\u003eCaravan and camper battery boxes where space for a fuse holder simply does not exist.\u003c\/li\u003e\n\u003cli\u003eLithium bank installations where a high interrupt rating matters.\u003c\/li\u003e\n\u003cli\u003eRenogy combiner box builds that use MRBF fuses on the busbar.\u003c\/li\u003e\n\u003cli\u003eSmaller DC sub-circuits such as lighting, water pumps and monitoring gear.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eLocal Support from 4Matt Campers\u003c\/h2\u003e\u003cp\u003e4Matt Campers delivers genuine Renogy parts across \u003cstrong\u003eSouth Africa\u003c\/strong\u003e. Fuse sizing is the part people most often get wrong, so if you are unsure whether 30A is right for the circuit you are protecting, ask us first. The MRBF range runs from 30A upwards. Everything else is in \u003ca href=\"\/collections\/electrical-accessories\"\u003eelectrical accessories\u003c\/a\u003e and \u003ca href=\"\/collections\/renogy\"\u003eRenogy\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eModel: Renogy MRBF Terminal Fuse\u003c\/li\u003e\n\u003cli\u003eSKU: RPD30TF-BL-G1-SA\u003c\/li\u003e\n\u003cli\u003eCurrent rating: 30A\u003c\/li\u003e\n\u003cli\u003eVoltage rating: 58V\u003c\/li\u003e\n\u003cli\u003eInterrupt rating: 10,000A at 14VDC, 5,000A at 32VDC, 2,000A at 58VDC\u003c\/li\u003e\n\u003cli\u003eDimensions: 23.5 x 20 x 11.5 mm\u003c\/li\u003e\n\u003cli\u003eMounting hole size: 5\/16 inch \/ M8\u003c\/li\u003e\n\u003cli\u003eInsulating body material: ceramic\u003c\/li\u003e\n\u003cli\u003eCover material: PES\u003c\/li\u003e\n\u003cli\u003eCertifications: RoHS, UL, CE\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 x Renogy 30A MRBF terminal fuse\u003c\/li\u003e\n\u003cli\u003e1 x M8 terminal bolt\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eOptional Fitment \u0026amp; Upgrade Notes\u003c\/h2\u003e\u003cp\u003eIf you are not using a Renogy combiner box, you will need an MRBF terminal fuse holder to mount this fuse on a standard battery post. The fuse itself is the element and the holder is what secures it and insulates the exposed side. Fit it on the positive terminal only. Keep the stack clean and tight: fuse, then cable lug, then the M8 bolt, torqued evenly. A loose MRBF stack heats up under load, and a hot joint eventually becomes a failed one. Do not fit a larger fuse than the cable can carry just because a circuit keeps blowing; a fuse that keeps blowing is telling you something about the load or a fault, not about itself.\u003c\/p\u003e\u003ch2\u003eComplete Your Setup\u003c\/h2\u003e\u003cp\u003eUse it alongside a bank from \u003ca href=\"\/collections\/lithium-batteries\"\u003elithium batteries\u003c\/a\u003e, a controller from \u003ca href=\"\/collections\/solar-charge-controllers\"\u003esolar charge controllers\u003c\/a\u003e and an array from \u003ca href=\"\/collections\/solar-panels\"\u003esolar panels\u003c\/a\u003e. Holders, ANL fuse sets, busbars and battery cable are in \u003ca href=\"\/collections\/electrical-accessories\"\u003eelectrical accessories\u003c\/a\u003e, and inverter protection is covered in \u003ca href=\"\/collections\/inverters-inverter-chargers\"\u003einverters and inverter chargers\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDo I need a fuse holder as well?\u003c\/strong\u003e\u003cbr\u003eYes, unless you are fitting it to a Renogy combiner box that already has MRBF provision. On a plain battery post you need an MRBF terminal fuse holder.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use a 30A fuse to protect my inverter?\u003c\/strong\u003e\u003cbr\u003eNo. A 2000W inverter draws far more than 30A. This rating suits controller feeds and light DC branches. Inverters need an ANL fuse sized to the cable.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it work on a 24V system?\u003c\/strong\u003e\u003cbr\u003eYes. It is rated to 58V, so 12V, 24V and 48V systems are all within spec, though the interrupt capacity drops as system voltage rises.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the M8 bolt do?\u003c\/strong\u003e\u003cbr\u003eIt is the fastener that clamps the fuse and your cable lug onto the terminal or busbar stud. It is included so you do not have to source one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow is this better than a blade fuse?\u003c\/strong\u003e\u003cbr\u003ePosition and interrupt capacity. It sits at the terminal so there is no unprotected cable, and it can safely break a very high fault current, which a small blade fuse cannot.\u003c\/p\u003e","brand":"Renogy","offers":[{"title":"Default Title","offer_id":48304240230585,"sku":"RPD30TF-BL-G1-SA","price":95.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0764\/4587\/6409\/files\/fuse-75A-_01__13505.1714123595.1280.1280.jpg?v=1784813404","url":"https:\/\/www.4mattcampers.co.za\/products\/renogy-30a-mrbf-terminal-fuse-m8-bolt","provider":"4Matt Campers","version":"1.0","type":"link"}