{"product_id":"jonsson-tech-bb250-3-250a-58vdc-busbar-3-m8-posts-150-mm-nickel-plated-copper-v-0-cover","title":"Jonsson Tech BB250-3 | 250A 58VDC Busbar — 3 × M8 Posts, 150 mm² Nickel-Plated Copper, V-0 Cover","description":"\u003cp\u003eThe \u003cstrong\u003eJonsson Tech BB250-3\u003c\/strong\u003e is a three-post DC busbar for 12 V, 24 V and 48 V systems — 150 mm² of nickel-plated copper on 40 mm centres, rated 250 A continuous to 58 V DC, with a flame-retardant cover that goes on last and comes off first.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThree posts means more connection points, not more current.\u003c\/strong\u003e The bar section is identical to the two-post — same 150 mm², same 250 A. What you gain is a third landing for a 2\/0 cable without daisy-chaining lugs on one stud.\u003c\/p\u003e\n\n\u003cp\u003eIt was designed around one rule: \u003cstrong\u003eno plastic in the bolted joint.\u003c\/strong\u003e On most moulded busbars the stud clamps down through the plastic body, and plastic under a torqued joint creeps. The joint relaxes, resistance climbs, and the bar runs hot — which is the one failure mode a busbar must not have. Here the clamp load runs bolt head → steel sleeve → copper → lug → washer → nut. Every element in that path is metal, and the plastic carries none of it.\u003c\/p\u003e\n\n\u003ch3\u003eBuilt for the current, not just rated for it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e150 mm² conductor\u003c\/strong\u003e — 110 × 25 × 6 mm nickel-plated copper, 5 µm minimum plating. At 250 A that's 1.67 A\/mm², and under 0.3 W of loss across each 40 mm span between posts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18 mm of clear air between adjacent 2\/0 lug tongues.\u003c\/strong\u003e Computed against a 22 mm tongue, which is wider than a real 2\/0 compression lug — so the gap on your bench is closer to 19 mm. Three cables land side by side without fighting each other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25 mm wide bar\u003c\/strong\u003e — a 2\/0 lug tongue is supported across its full width. No overhang, no point loading at the crimp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree M8 stainless posts\u003c\/strong\u003e on 40 mm centres, torqued to 13 N·m (115 in-lb), with 22.4 mm of stud above the bar — enough thread to land two lug tongues on one post, with 4.6 mm to spare.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel-sleeved posts.\u003c\/strong\u003e The sleeve, not the plastic, takes the clamp. Torque it once and it stays torqued.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eA cover that works the way you install\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIts own two screws, outboard of the base.\u003c\/strong\u003e Mount the base, land your cables, then drop the cover on. You never have to back out a mounting screw after the cables are connected — and the cover comes off later without disturbing the base or the lugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree scalloped cable guides per side.\u003c\/strong\u003e An arch over every post, sized to clear a 2\/0 crimp barrel, so the cover drops straight down over cables that are already landed. Cables exit left, right, or both.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlame-retardant throughout.\u003c\/strong\u003e Base \u003cem\u003eand\u003c\/em\u003e cover are both printed in UL 94 V-0 rated flame-retardant polycarbonate (PC-FR) — not just the base.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountersunk mounting screws\u003c\/strong\u003e sit flush in the ears and feet. Nothing stands proud of either surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStrain relief pads\u003c\/strong\u003e built into the base, 0.2 mm under each lug tongue, so a cable pulled sideways loads the base and not the crimp.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrinted and assembled in Spring, Texas.\u003c\/strong\u003e Made to order by a Victron-trained installer who builds these systems for a living.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous rating\u003c\/td\u003e\n\u003ctd\u003e250 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum voltage\u003c\/td\u003e\n\u003ctd\u003e58 V DC (12 V \/ 24 V \/ 48 V systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosts\u003c\/td\u003e\n\u003ctd\u003e3 × M8 stainless, 40 mm (1.57 in) centres, 80 mm total span\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePost torque\u003c\/td\u003e\n\u003ctd\u003e13 N·m \/ 115 in-lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStud above bar\u003c\/td\u003e\n\u003ctd\u003e22.4 mm — fits two lug tongues\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGap between adjacent 2\/0 tongues\u003c\/td\u003e\n\u003ctd\u003e18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConductor\u003c\/td\u003e\n\u003ctd\u003e110 × 25 × 6 mm nickel-plated copper, 150 mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent density at 250 A\u003c\/td\u003e\n\u003ctd\u003e1.67 A\/mm²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLoss between posts at 250 A\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 0.3 W per 40 mm span\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase and cover\u003c\/td\u003e\n\u003ctd\u003eFlame-retardant polycarbonate (PC-FR), UL 94 V-0 rated material\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase mounting\u003c\/td\u003e\n\u003ctd\u003e2 × M5, 140 mm (5.51 in) centres, countersunk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCover mounting\u003c\/td\u003e\n\u003ctd\u003e2 × M4, 185 mm (7.28 in) centres — independent of the base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable exits\u003c\/td\u003e\n\u003ctd\u003eBoth long sides, 3 scallops per side, clears a 2\/0 crimp barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall with cover\u003c\/td\u003e\n\u003ctd\u003e198 × 51 × 46.9 mm (7.80 × 2.01 × 1.85 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase alone\u003c\/td\u003e\n\u003ctd\u003e159 × 40 × 18.8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e381 g (0.84 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003ePrinted and assembled in Spring, Texas\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIn the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × busbar base with nickel-plated copper bar fitted\u003c\/li\u003e\n\u003cli\u003e1 × flame-retardant cover\u003c\/li\u003e\n\u003cli\u003e3 × M8 × 35 stainless post bolts, with steel load sleeves, flat washers and nuts (fitted)\u003c\/li\u003e\n\u003cli\u003e2 × M5 flat-head base mounting screws\u003c\/li\u003e\n\u003cli\u003e2 × M4 flat-head cover mounting screws\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGood to know\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNot finger-safe to IP2X — the cable arches are open by design so the cover fits over landed cables. Mount it in a locker or enclosure, as you would any open busbar.\u003c\/li\u003e\n\u003cli\u003e58 V DC is the rating for lithium and lead systems up to 48 V nominal. DC only.\u003c\/li\u003e\n\u003cli\u003eMade to order. If you need a quantity, message us and we'll give you an honest lead time.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Jonsson Tech","offers":[{"title":"Default Title","offer_id":50550532899035,"sku":"JT-BB250-3P","price":46.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/3200\/9947\/files\/BB250-3_dimensions_3.png?v=1790979973","url":"https:\/\/www.jonssontech.net\/products\/jonsson-tech-bb250-3-250a-58vdc-busbar-3-m8-posts-150-mm-nickel-plated-copper-v-0-cover","provider":"Jonsson Tech LLC","version":"1.0","type":"link"}