{"product_id":"jbk3-jbk5-machine-tool-control-transformer-dry-isolation-63-250va","title":"JBK3\/JBK5 Machine Tool Control Transformer – Dry Isolation 63–250VA","description":"\n\u003ch2\u003eJBK3 \u0026amp; JBK5 Series Machine Tool Control Transformer\u003c\/h2\u003e\n\u003cp\u003eEngineered for demanding industrial environments, the \u003cstrong\u003eJBK3\/JBK5 Series Dry Isolation Control Transformer\u003c\/strong\u003e delivers stable, reliable power isolation for CNC machines, elevators, grinding mills, milling machines, lathes, and other precision machine tools. Built with a high-conductivity \u003cstrong\u003ecopper coil winding\u003c\/strong\u003e, this transformer ensures efficient energy transfer, minimal heat buildup, and long-lasting durability in continuous-duty applications.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're powering control circuits on a CNC lathe, milling center, or elevator drive panel, the JBK3\/JBK5 provides the clean, isolated voltage your equipment demands. Available in multiple VA ratings (63VA, 160VA, 250VA and more) — simply place your order and specify your required input\/output voltage in the order notes.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDry-Type Isolation Design\u003c\/strong\u003e — No liquid coolant needed; safe and maintenance-free for indoor industrial use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCopper Coil Winding\u003c\/strong\u003e — Superior conductivity for low resistive losses and stable output voltage\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide VA Range\u003c\/strong\u003e — Available from 63VA up to 250VA to suit various machine tool control circuits\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application\u003c\/strong\u003e — Compatible with CNC machines, lathes, milling machines, grinding machines, elevators, and more\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Voltage Configuration\u003c\/strong\u003e — Specify your required primary and secondary voltage at checkout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Robust Construction\u003c\/strong\u003e — Designed to fit standard machine tool electrical enclosures\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow No-Load Loss\u003c\/strong\u003e — Energy-efficient operation reduces running costs over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eParameter\u003c\/th\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eSeries\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eJBK3 \/ JBK5\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVA Ratings Available\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e63VA, 160VA, 250VA (specify at order)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eTransformer Type\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eDry Isolation (Air-Cooled)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eWinding Material\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCopper Coil\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eApplications\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCNC Machines, Lathes, Milling, Grinding, Elevators\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eVoltage Configuration\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCustom — specify input\/output voltage in order notes\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China (Mainland)\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eThe JBK3\/JBK5 control transformer is widely used in:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCNC (Computer Numerical Control) machining centers and turning centers\u003c\/li\u003e\n  \u003cli\u003eSurface and cylindrical grinding machines\u003c\/li\u003e\n  \u003cli\u003eHorizontal and vertical milling machines\u003c\/li\u003e\n  \u003cli\u003eMetal lathes and engine lathes\u003c\/li\u003e\n  \u003cli\u003eElevator and lift motor control panels\u003c\/li\u003e\n  \u003cli\u003eIndustrial automation and machine tool electrical cabinets\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety \u0026amp; Standards Reference\u003c\/h3\u003e\n\u003cp\u003eTransformer installations in industrial and commercial environments should comply with applicable electrical safety standards. For guidance on workplace electrical safety, refer to \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Guidelines\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What VA rating do I need for my machine tool control transformer?\u003c\/h4\u003e\n\u003cp\u003eA: The VA (volt-ampere) rating you need depends on the total power consumption of the control circuit your transformer will serve. Add up the wattage of all connected control devices (relays, solenoids, indicators, PLCs) and select a VA rating at least 20–25% above that total for safe headroom. Common ratings in the JBK3\/JBK5 series include 63VA, 160VA, and 250VA.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I specify a custom input and output voltage for this transformer?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. When placing your order, simply include a note specifying your required primary (input) voltage and secondary (output) voltage. This transformer series supports a wide range of common industrial voltages including 110V, 220V, 380V, and 440V primary inputs with various secondary output options.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the advantage of a dry-type isolation transformer over an oil-filled type?\u003c\/h4\u003e\n\u003cp\u003eA: Dry-type isolation transformers use air cooling rather than liquid coolant, making them cleaner, safer, and virtually maintenance-free. They are ideal for indoor machine tool enclosures where leakage or fire hazard from oil would be a concern. The JBK3\/JBK5 series is specifically designed for this type of enclosed industrial application.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why is a copper coil winding preferred in control transformers?\u003c\/h4\u003e\n\u003cp\u003eA: Copper coil windings offer lower electrical resistance than aluminum alternatives, resulting in less energy lost as heat, more stable output voltage under varying loads, and a longer operational lifespan — making copper-wound transformers the industry-preferred choice for precision machine tool control circuits.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What VA rating do I need for my machine tool control transformer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The VA (volt-ampere) rating you need depends on the total power consumption of the control circuit your transformer will serve. Add up the wattage of all connected control devices (relays, solenoids, indicators, PLCs) and select a VA rating at least 20–25% above that total for safe headroom. Common ratings in the JBK3\/JBK5 series include 63VA, 160VA, and 250VA.\"}}, {\"@type\": \"Question\", \"name\": \"Can I specify a custom input and output voltage for this transformer?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. When placing your order, simply include a note specifying your required primary (input) voltage and secondary (output) voltage. This transformer series supports a wide range of common industrial voltages including 110V, 220V, 380V, and 440V primary inputs with various secondary output options.\"}}, {\"@type\": \"Question\", \"name\": \"What is the advantage of a dry-type isolation transformer over an oil-filled type?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Dry-type isolation transformers use air cooling rather than liquid coolant, making them cleaner, safer, and virtually maintenance-free. They are ideal for indoor machine tool enclosures where leakage or fire hazard from oil would be a concern. The JBK3\/JBK5 series is specifically designed for this type of enclosed industrial application.\"}}, {\"@type\": \"Question\", \"name\": \"Why is a copper coil winding preferred in control transformers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Copper coil windings offer lower electrical resistance than aluminum alternatives, resulting in less energy lost as heat, more stable output voltage under varying loads, and a longer operational lifespan — making copper-wound transformers the industry-preferred choice for precision machine tool control circuits.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"JBK3\/JBK5 Machine Tool Control Transformer – Dry Isolation 63–250VA\", \"item\": \"https:\/\/oasis-select.com\/products\/jbk3-jbk5-machine-tool-control-transformer-dry-isolation-63-250va\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"JBK5-400VA","offer_id":47746763882601,"sku":"14:691#JBK5-400VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-500VA","offer_id":47746763915369,"sku":"14:200004890#JBK5-500VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-63VA","offer_id":47746763948137,"sku":"14:771#JBK5-63VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-100VA","offer_id":47746763980905,"sku":"14:193#JBK5-100VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-160VA","offer_id":47746764013673,"sku":"14:173# JBK5-160VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-200VA","offer_id":47746764046441,"sku":"14:1254#JBK5-200VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-250VA","offer_id":47746764079209,"sku":"14:365458#JBK5-250VA","price":186.82,"currency_code":"USD","in_stock":true},{"title":"JBK5-300VA","offer_id":47746764111977,"sku":"14:350850#JBK5-300VA","price":186.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/Sc6390627e4404adf81b4626ebe210d59L.webp?v=1783058188","url":"https:\/\/oasis-select.com\/products\/jbk3-jbk5-machine-tool-control-transformer-dry-isolation-63-250va","provider":"Oasis Select","version":"1.0","type":"link"}