{"product_id":"new-1-pcs-avc-fan-bn17569b24u-dc24v-3-72a-175-69mm-4-wire-centrifugal-fan-turbofan","title":"new 1 PCS AVC Fan BN17569B24U DC24V 3.72A 175*69mm 4-wire centrifugal fan turbofan","description":"\u003c!-- SEO Introduction --\u003e\n\u003cdiv class=\"koeed-container\" style=\"line-height: 1.6; color: #333; font-family: sans-serif; width: 100%;\"\u003e\n    \u003ch2 style=\"color: #0056b3; border-left: 5px solid #16c8c8; padding-left: 15px; margin-top: 0;\"\u003eAVC BN17569B24U 24V DC Centrifugal Cooling Fan\u003c\/h2\u003e\n    \u003cp\u003e\n        The \u003cstrong\u003eAVC (Asia Vital Components) BN17569B24U\u003c\/strong\u003e is a heavy-duty, high-performance backward-curved centrifugal fan (turbofan) designed for demanding industrial cooling applications. Measuring \u003cstrong\u003e175mm in diameter and 69mm in height\u003c\/strong\u003e, this fan leverages a robust 24V DC motor drawing 3.72 Amps to generate exceptional airflow and high static pressure, making it ideal for systems with high air resistance.\n    \u003c\/p\u003e\n    \u003cp\u003e\n        Equipped with a standard \u003cstrong\u003e4-wire interface\u003c\/strong\u003e, this fan offers advanced thermal management capabilities. It supports \u003cstrong\u003ePWM (Pulse Width Modulation)\u003c\/strong\u003e for precise, dynamic speed control, allowing the system to scale cooling based on real-time thermal loads, thus saving energy and reducing acoustic noise. The integrated tachometer (FG) signal provides vital speed feedback to the host controller to instantly detect stalls and prevent catastrophic equipment overheating.\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;\"\u003eManufacturer \u0026amp; Brand\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eAVC (Asia Vital Components)\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;\"\u003eModel Number\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eBN17569B24U\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;\"\u003eFan Type\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eCentrifugal Fan \/ Turbofan (Backward Curved)\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;\"\u003eDimensions\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eΦ 175 mm x 69 mm (Height\/Thickness)\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 Voltage\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e24V DC\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 Current\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e3.72 A (High Power Draw)\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;\"\u003eEstimated Power Consumption\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eApprox. 89.28 Watts\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;\"\u003eWiring Configuration\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e4-Wire (VCC, GND, PWM Control, FG\/Tachometer Output)\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;\"\u003eBearing Type\u003c\/td\u003e\n                    \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eDual Ball Bearing (Built for continuous 24\/7 operation)\u003c\/td\u003e\n                \u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003c!-- Application \u0026 Reliability --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eIndustrial Applications \u0026amp; Thermal Advantages\u003c\/h3\u003e\n    \u003cp\u003e\n        Unlike standard axial fans that simply push air in a straight line, backward-curved centrifugal fans pull air in from the center and exhaust it radially at a 90-degree angle. This design creates vastly superior static pressure.\n    \u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eTelecommunication Cabinets:\u003c\/strong\u003e Pushing cold air through densely packed server racks, thick dust filters, and narrow heat exchanger fins where standard fans would stall.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePower Electronics:\u003c\/strong\u003e Cooling massive heatsinks on Variable Frequency Drives (VFDs), solar inverters, and battery energy storage systems (BESS).\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHigh Power Draw Considerations:\u003c\/strong\u003e At 3.72 Amps (nearly 90 Watts), this fan requires a dedicated, robust 24V power supply and heavy-duty switching relays or MOSFETs if controlled directly.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003c!-- Koeed B2B Tool: Enclosure Cooling Airflow Calculator --\u003e\n    \u003cdiv id=\"koeed-cooling-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;\"\u003eEngineering Tool: Enclosure Cooling Airflow (CFM) Calculator\u003c\/h3\u003e\n        \u003cp style=\"font-size: 0.9em; color: #666;\"\u003eDetermine if the cooling capacity of your fans is sufficient for your electrical cabinet. Enter the total heat dissipated by the electronics inside the enclosure and your target temperature limits to calculate the minimum required airflow in CFM and m³\/h.\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;\"\u003eTotal Heat Dissipation (Watts):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-watts-input\" placeholder=\"e.g., 500\" min=\"1\" style=\"width: 100%; padding: 8px; border: 1px solid #ccc; border-radius: 4px; box-sizing: border-box;\"\u003e\n                \u003csmall style=\"color: #888;\"\u003e*Total power lost as heat by VFDs, PLCs, and power supplies.\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;\"\u003eMax Allowable Internal Temp (°C):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-internal-temp\" value=\"45\" 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;\"\u003eMax Ambient Outside Temp (°C):\u003c\/label\u003e\n                \u003cinput type=\"number\" id=\"koeed-ambient-temp\" value=\"30\" 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=\"koeedCalculateAirflow()\" style=\"background: #16c8c8; color: white; border: none; padding: 12px 24px; border-radius: 4px; cursor: pointer; font-weight: bold; transition: background 0.3s;\"\u003eCalculate Required Airflow\u003c\/button\u003e\n        \n        \u003cdiv id=\"koeed-airflow-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\u003ePermissible Temp Rise (ΔT):\u003c\/strong\u003e \u003cspan id=\"koeed-dt-out\" style=\"color: #333; font-weight: bold;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 10px;\"\u003e\n\u003cstrong\u003eMinimum Required Airflow:\u003c\/strong\u003e \u003cspan id=\"koeed-cfm-out\" style=\"color: #d32f2f; font-weight: bold; font-size: 1.2em;\"\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n            \u003cdiv style=\"margin-bottom: 5px;\"\u003e\n\u003cstrong\u003eMetric Equivalent:\u003c\/strong\u003e \u003cspan id=\"koeed-cmh-out\" style=\"color: #0056b3; font-weight: bold; font-size: 1.1em;\"\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*Note: This calculation assumes sea-level air density. In systems with heavy dust filters or dense heatsinks, static pressure resistance increases. We recommend over-sizing your fan's CFM rating by 25% to account for this pressure drop.\u003c\/p\u003e\n        \u003c\/div\u003e\n\n        \u003cnoscript\u003e\n            \u003cp\u003e\u003cstrong\u003eSEO Tool Physics Formula:\u003c\/strong\u003e To calculate the required cooling airflow for an electrical enclosure, use the standard thermal formula: CFM = (1.76 × Watts) \/ ΔT (°C). The Delta T (ΔT) is the difference between the maximum allowed internal temperature and the maximum ambient outside temperature. To convert CFM to Cubic Meters per Hour (m³\/h), multiply the CFM value by 1.699.\u003c\/p\u003e\n        \u003c\/noscript\u003e\n    \u003c\/div\u003e\n\n    \u003cscript\u003e\n        function koeedCalculateAirflow() {\n            const watts = parseFloat(document.getElementById('koeed-watts-input').value);\n            const internalTemp = parseFloat(document.getElementById('koeed-internal-temp').value);\n            const ambientTemp = parseFloat(document.getElementById('koeed-ambient-temp').value);\n            \n            const resultsBox = document.getElementById('koeed-airflow-results');\n\n            if (isNaN(watts) || isNaN(internalTemp) || isNaN(ambientTemp) || watts \u003c= 0) {\n                alert(\"Please enter valid numerical values. Heat dissipation must be greater than 0.\");\n                return;\n            }\n\n            const deltaT = internalTemp - ambientTemp;\n\n            if (deltaT \u003c= 0) {\n                alert(\"Error: The Max Allowable Internal Temperature must be strictly HIGHER than the Max Ambient Temperature for fan cooling to work.\");\n                return;\n            }\n\n            \/\/ Formula: CFM = (1.76 * Watts) \/ Delta T\n            const requiredCFM = (1.76 * watts) \/ deltaT;\n            \n            \/\/ Convert CFM to m3\/h (CMH)\n            const requiredCMH = requiredCFM * 1.69901;\n\n            document.getElementById('koeed-dt-out').innerHTML = deltaT.toFixed(1) + \" °C\";\n            document.getElementById('koeed-cfm-out').innerHTML = requiredCFM.toFixed(1) + \" CFM (Cubic Feet per Minute)\";\n            document.getElementById('koeed-cmh-out').innerHTML = requiredCMH.toFixed(1) + \" m³\/h\";\n            \n            resultsBox.style.display = 'block';\n        }\n    \u003c\/script\u003e\n\n    \u003c!-- Troubleshooting FAQ --\u003e\n    \u003ch3 style=\"color: #0056b3;\"\u003eWiring \u0026amp; Troubleshooting FAQ\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003e1. Can I use this 4-wire fan if my power supply only has 2 wires (+ and -)?\u003c\/strong\u003e\u003cbr\u003e\n    Yes. If you only connect the 24V Positive (VCC) and Ground (GND) wires, leaving the PWM and FG wires disconnected, the fan will default to spinning continuously at 100% full speed. Ensure you properly insulate the unused PWM and FG wires to prevent short circuits.\u003c\/p\u003e\n    \n    \u003cp\u003e\u003cstrong\u003e2. The fan is running, but the motherboard reports a \"Fan Stall\/Failure\" alarm.\u003c\/strong\u003e\u003cbr\u003e\n    This issue involves the Tachometer (FG) wire. The FG pin outputs a square wave pulse (typically 2 pulses per revolution) to indicate speed. If the fan spins but triggers an alarm, either the FG wire is severed, or the motherboard requires a \"pull-up resistor\" to correctly read the open-collector output of the fan's FG signal.\u003c\/p\u003e\n\n    \u003cp\u003e\u003cstrong\u003e3. Why is the fan vibrating heavily and making a loud whining noise?\u003c\/strong\u003e\u003cbr\u003e\n    Centrifugal fans like the BN17569B24U operate at high rotational speeds. Heavy vibration is typically caused by a buildup of dust or debris unevenly coating the curved blades, ruining the delicate dynamic balance of the impeller. Clean the blades thoroughly. If the vibration persists with a metallic whining noise, the internal dual ball bearings are worn out, and the fan must be replaced immediately to prevent catastrophic failure.\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\": \"Can I run a 4-wire PWM fan with only 2 wires?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. By connecting only the 24V power and ground wires and leaving the PWM wire disconnected, the fan will default to running at its maximum 100% speed.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Why does my equipment show a fan error when the fan is spinning?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"This points to a failure in the Tachometer (FG) feedback loop. Check if the FG signal wire is disconnected or damaged. In custom setups, ensure a proper pull-up resistor is installed so the controller can read the open-collector signal.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What causes severe vibration in a centrifugal turbofan?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Vibration is most commonly caused by uneven dirt or debris buildup on the impeller blades, destroying its dynamic balance. If cleaning does not resolve it, the internal ball bearings are likely worn and the unit requires replacement.\"\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\": \"Enclosure Cooling Airflow CFM Calculator\",\n  \"description\": \"An engineering tool to calculate the minimum required cooling airflow (in CFM and m³\/h) for electrical cabinets based on internal heat dissipation and target temperature differentials.\",\n  \"applicationCategory\": \"EngineeringTool\",\n  \"operatingSystem\": \"Any\"\n}\n\u003c\/script\u003e","brand":"AVC","offers":[{"title":"Default Title","offer_id":44488226963641,"sku":"256552689186","price":292.64,"currency_code":"USD","in_stock":true}],"url":"https:\/\/koeed.com\/el\/products\/new-1-pcs-avc-fan-bn17569b24u-dc24v-3-72a-175-69mm-4-wire-centrifugal-fan-turbofan","provider":"KOEED","version":"1.0","type":"link"}