{"product_id":"new-1pc-epcos-b43456-s5129-m1-450v-12000uf-capacitor","title":"1PC EPCOS B43456-S5129-M1 450V 12000UF Capacitor","description":"\u003c!-- SEO Introduction --\u003e\n\u003cdiv class=\"koeed-container\" style=\"line-height: 1.6; color: #333; width: 100%;\"\u003e\n    \u003ch2 style=\"color: #0056b3; border-left: 5px solid #16c8c8; padding-left: 15px; margin-top: 0;\"\u003eEPCOS B43456-S5129-M1 450V 12000UF Aluminum Electrolytic Capacitor\u003c\/h2\u003e\n    \u003cp\u003e\n        The \u003cstrong\u003eEPCOS (TDK) B43456-S5129-M1\u003c\/strong\u003e is a premium-grade, screw-terminal aluminum electrolytic capacitor engineered for demanding industrial power applications. With a massive \u003cstrong\u003e12000µF capacitance and 450V DC voltage rating\u003c\/strong\u003e, it is designed for heavy-duty DC-link filtering, energy storage, and smoothing in high-power converter systems.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        Known for its all-welded construction, the B43456 series ensures reliable electrical contact and outstanding ripple current capability, making it a critical component for maximizing the uptime of inverters, UPS systems, and motor drives.\n    \u003c\/p\u003e\n\n    \u003c!-- Technical Specifications --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eDetailed Technical Specifications\u003c\/h3\u003e\n    \u003cdiv style=\"overflow-x: auto;\"\u003e\n        \u003ctable style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #eeeeee;\"\u003e\n            \u003cthead\u003e\n                \u003ctr style=\"background-color: #16c8c8; color: white;\"\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eParameter\u003c\/th\u003e\n                    \u003cth style=\"padding: 12px; text-align: left; border: 1px solid #eeeeee;\"\u003eSpecification Data\u003c\/th\u003e\n                \u003c\/tr\u003e\n            \u003c\/thead\u003e\n            \u003ctbody\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eBrand \/ Manufacturer\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eEPCOS (TDK Electronics)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eSeries\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eB43456 (High ripple current, compact)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eRated Capacitance (CR)\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e12000 µF (Microfarads)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eRated Voltage (VR)\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e450V DC\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eSurge Voltage (VS)\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eApprox. 495V DC (at 85°C)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eTerminal Type\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eScrew Terminals (M-style, M6\/M8)\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #f4fcfc;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eOperating Temperature Range\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e-40°C to +85°C\u003c\/td\u003e\n                \u003c\/tr\u003e\n                \u003ctr style=\"background-color: #fafafa;\"\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee; font-weight: bold;\"\u003eConstruction\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eAluminum case with insulating sleeve, all-welded\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Application --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eIndustrial Applications \u0026amp; Reliability\u003c\/h3\u003e\n    \u003cp\u003e\n        High-voltage DC capacitors are the backbone of power electronics. The 12000uF capacity is optimized for:\n    \u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFrequency Converters (VFDs):\u003c\/strong\u003e Smoothing the rectified DC bus voltage before inversion to AC motor power.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eRenewable Energy:\u003c\/strong\u003e DC-link applications in wind power generators and central solar inverters.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eUninterruptible Power Supplies (UPS):\u003c\/strong\u003e Providing rapid energy bridging during transient grid faults.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003c!-- Koeed B2B Tool: Capacitor Energy \u0026 Bleed Resistor Calculator --\u003e\n    \u003cdiv id=\"koeed-capacitor-tool\" style=\"background: #f9f9f9; border: 2px solid #16c8c8; border-radius: 8px; padding: 20px; margin: 30px 0;\"\u003e\n        \u003ch3 style=\"margin-top: 0; color: #16c8c8;\"\u003eSafety Tool: Energy \u0026amp; Bleed Resistor Calculator\u003c\/h3\u003e\n        \u003cp style=\"font-size: 0.9em; color: #666;\"\u003eHigh voltage capacitors store lethal energy. Use this tool to calculate total stored energy (Joules) and size the necessary bleed resistor to safely discharge the capacitor for maintenance.\u003c\/p\u003e\n        \n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eCapacitance (µF):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-cap-input\" value=\"12000\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eSystem Voltage (V DC):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-vol-input\" value=\"450\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n\n        \u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 15px; margin-bottom: 15px;\"\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eTarget Safe Voltage (V):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-safe-vol-input\" value=\"50\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003eStandard industrial safe limit is \u0026lt;50V.\u003c\/small\u003e\n            \u003c\/div\u003e\n            \u003cdiv style=\"flex: 1; min-width: 180px;\"\u003e\n                \u003clabel style=\"display: block; font-weight: bold; margin-bottom: 5px;\"\u003eDesired Discharge Time (Sec):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-time-input\" value=\"60\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n            \u003c\/div\u003e\n        \u003c\/div\u003e\n        \n        \u003cbutton onclick=\"koeedCalculateDischarge()\" style=\"background: #16c8c8; color: white; border: none; padding: 12px 24px; border-radius: 4px; cursor: pointer; font-weight: bold; transition: background 0.3s;\"\u003eCalculate Discharge Parameters\u003c\/button\u003e\n        \n        \u003cdiv id=\"koeed-calc-results\" style=\"margin-top: 20px; padding: 15px; background: white; border-radius: 4px; border-left: 5px solid #0056b3; display: none; box-shadow: 0 2px 4px rgba(0,0,0,0.05);\"\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eStored Energy:\u003c\/strong\u003e \u003cspan id=\"koeed-energy-out\" style=\"color: #d32f2f; font-weight: bold; font-size: 1.1em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eRequired Resistor Value:\u003c\/strong\u003e \u003cspan id=\"koeed-resistor-out\" style=\"color: #0056b3; font-weight: bold; font-size: 1.1em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 5px;\"\u003e\n\u003cstrong\u003ePeak Resistor Power:\u003c\/strong\u003e \u003cspan id=\"koeed-power-out\" style=\"color: #0056b3; font-weight: bold;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cp style=\"font-size: 0.85em; color: #555; margin-top: 10px; border-top: 1px solid #eee; padding-top: 10px;\"\u003e*Warning: Always verify voltage with a multimeter before servicing. Use appropriate high-power wirewound resistors. Do not short terminals directly.\u003c\/p\u003e\n        \u003c\/div\u003e\n\n        \u003cnoscript\u003e\n            \u003cp\u003e\u003cstrong\u003eSEO Tool Data:\u003c\/strong\u003e To calculate stored energy in a capacitor: E = 0.5 * C * V^2. For a 12000µF capacitor at 450V, the stored energy is approximately 1,215 Joules. To discharge to 50V in 60 seconds, a bleed resistor of roughly 2.2 kOhms rated for high pulse power is required based on the RC time constant formula.\u003c\/p\u003e\n        \u003c\/noscript\u003e\n    \u003c\/div\u003e\n\n    \u003cscript\u003e\n        function koeedCalculateDischarge() {\n            const c_uF = parseFloat(document.getElementById('koeed-cap-input').value);\n            const v_initial = parseFloat(document.getElementById('koeed-vol-input').value);\n            const v_safe = parseFloat(document.getElementById('koeed-safe-vol-input').value);\n            const t_sec = parseFloat(document.getElementById('koeed-time-input').value);\n            \n            const resultsBox = document.getElementById('koeed-calc-results');\n\n            if (isNaN(c_uF) || isNaN(v_initial) || isNaN(v_safe) || isNaN(t_sec) || c_uF \u003c= 0 || v_initial \u003c= 0 || t_sec \u003c= 0) {\n                alert(\"Please enter valid positive numbers for all parameters.\");\n                return;\n            }\n\n            if (v_safe \u003e= v_initial) {\n                alert(\"Target safe voltage must be lower than the system voltage.\");\n                return;\n            }\n\n            \/\/ Convert capacitance to Farads\n            const c_F = c_uF \/ 1000000;\n\n            \/\/ Calculate Energy (Joules)\n            const energy_joules = 0.5 * c_F * Math.pow(v_initial, 2);\n\n            \/\/ Calculate Resistor Value using RC time constant formula: V(t) = V0 * e^(-t\/RC) -\u003e R = -t \/ (C * ln(V\/V0))\n            const ln_ratio = Math.log(v_safe \/ v_initial);\n            const r_ohms = -t_sec \/ (c_F * ln_ratio);\n\n            \/\/ Calculate Peak Power (Watts): P = V^2 \/ R\n            const peak_power = Math.pow(v_initial, 2) \/ r_ohms;\n\n            document.getElementById('koeed-energy-out').innerHTML = energy_joules.toFixed(2) + \" Joules (J)\";\n            document.getElementById('koeed-resistor-out').innerHTML = r_ohms.toFixed(0) + \" Ω (Ohms)\";\n            document.getElementById('koeed-power-out').innerHTML = peak_power.toFixed(1) + \" W (Select a resistor rated significantly higher or pulsed rated)\";\n            \n            resultsBox.style.display = 'block';\n        }\n    \u003c\/script\u003e\n\n    \u003c!-- Troubleshooting FAQ --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eMaintenance \u0026amp; Troubleshooting FAQ\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003e1. How do I safely discharge this 450V 12000uF capacitor before maintenance?\u003c\/strong\u003e\u003cbr\u003e\n    Never short the terminals with a screwdriver; this causes an arc flash, destroys the terminals, and can cause internal damage. Use a properly sized high-power wirewound bleeder resistor connected across the terminals. Use the built-in calculator above to find the correct resistance value for your desired discharge time, and always verify with a digital multimeter before touching.\u003c\/p\u003e\n    \n    \u003cp\u003e\u003cstrong\u003e2. Can I replace a smaller capacitance value with this 12000uF model?\u003c\/strong\u003e\u003cbr\u003e\n    Increasing DC-link capacitance can provide smoother ripple and better hold-up time. However, it also significantly increases the inrush current during power-up. Ensure your rectifier bridge or pre-charge circuit (inrush limiting resistor\/contactor) is rated to handle the higher surge current of a 12000uF capacitor.\u003c\/p\u003e\n\n    \u003cp\u003e\u003cstrong\u003e3. What causes the safety vent to bulge or leak?\u003c\/strong\u003e\u003cbr\u003e\n    Electrolytic capacitors will bulge or trigger their mechanical safety vent due to internal gas buildup. This is typically caused by: exceeding the maximum voltage rating (450V), excessive high-frequency ripple current causing internal overheating, or reverse polarity connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003c!-- Structured Data --\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I safely discharge a 450V 12000uF capacitor?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Never short the terminals. Connect a properly sized high-power wirewound bleeder resistor across the screw terminals to slowly bleed off the voltage. Verify the voltage has dropped below 50V DC using a digital multimeter before performing maintenance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What causes an electrolytic capacitor to bulge?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bulging or venting is caused by internal gas expansion due to overheating. Common causes include overvoltage, excessive ripple current beyond the rated specifications, or incorrect polarity.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"WebApplication\",\n  \"name\": \"Capacitor Energy \u0026 Bleed Resistor Calculator\",\n  \"description\": \"Calculates the total stored energy in Joules and determines the appropriate discharge bleed resistor value for high voltage capacitors.\",\n  \"applicationCategory\": \"EngineeringTool\",\n  \"operatingSystem\": \"Any\"\n}\n\u003c\/script\u003e","brand":"EPCOS","offers":[{"title":"Default Title","offer_id":44263359054009,"sku":"166618137852","price":789.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_631a7f04-fc04-4eec-bef2-35ea8df9abc1.jpg?v=1723789453","url":"https:\/\/koeed.com\/sv\/products\/new-1pc-epcos-b43456-s5129-m1-450v-12000uf-capacitor","provider":"KOEED","version":"1.0","type":"link"}