{"product_id":"runda-rsh1225b2424a-12025-dc24v-0-17a-2-wire-inverter-cooling-fan","title":"RUNDA RSH1225B2424A 12025 DC24V 0.17A 2-wire inverter cooling fan","description":"\u003c!-- SEO Introduction --\u003e\n\u003cdiv class=\"koeed-container\"\u003e\n  \u003ch2 style=\"color: #0056b3; border-left: 5px solid #16c8c8; padding-left: 15px;\"\u003eRUNDA RSH1225B2424A DC Cooling Fan | 12025 24V Inverter Replacement\u003c\/h2\u003e\n  \u003cp\u003eThe \u003cstrong\u003eRUNDA RSH1225B2424A\u003c\/strong\u003e is a commercial-grade, direct current (DC) axial cooling fan strictly engineered for continuous industrial operations. Adhering to the standard \u003cstrong\u003e12025 form factor (120x120x25mm)\u003c\/strong\u003e, this 2-wire fan is optimized for high-efficiency thermal management in enclosed systems. Operating at \u003cstrong\u003e24V DC with a 0.17A current draw\u003c\/strong\u003e, it provides reliable airflow to prevent overheating in critical electronic components, making it a highly sought-after exact replacement part for frequency inverters (VFDs) and automation control cabinets.\u003c\/p\u003e\n  \u003cp\u003e\u003cstrong\u003eKey Applications:\u003c\/strong\u003e Variable Frequency Drives (VFDs) cooling, CNC machine control boxes, telecom enclosures, server racks, and industrial power supply units.\u003c\/p\u003e\n\n  \u003c!-- Technical Specifications --\u003e\n  \u003ch3 style=\"color: #0056b3; margin-top: 25px;\"\u003eTechnical \u0026amp; Dimensional Specifications\u003c\/h3\u003e\n  \u003cdiv style=\"overflow-x: auto;\"\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse; min-width: 600px; border: 1px solid #eeeeee;\"\u003e\n      \u003cthead\u003e\n        \u003ctr style=\"background-color: #16c8c8; color: #ffffff;\"\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 Detail\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\u003c\/td\u003e\n          \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eRUNDA\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;\"\u003eRSH1225B2424A\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;\"\u003eDimensions (L x W x D)\u003c\/td\u003e\n          \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e120 mm x 120 mm x 25 mm (Standard 12025 Size)\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\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: #f4fcfc;\"\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;\"\u003e0.17 A\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;\"\u003ePower Consumption\u003c\/td\u003e\n          \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eApprox. 4.08 W\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;\"\u003eWiring Configuration\u003c\/td\u003e\n          \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003e2-Wire System (Positive \/ Negative). No RPM sensor feedback.\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;\"\u003eBearing Type\u003c\/td\u003e\n          \u003ctd style=\"padding: 10px; border: 1px solid #eeeeee;\"\u003eBall Bearing (Indicated by 'B' in nomenclature; suitable for 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; margin-top: 25px;\"\u003eDesign Reliability \u0026amp; Installation\u003c\/h3\u003e\n  \u003cul style=\"line-height: 1.6; color: #333333;\"\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color: #16c8c8;\"\u003ePlug-and-Play Compatibility:\u003c\/strong\u003e Designed with a straightforward 2-wire interface. This means it runs at a constant speed when 24V is applied, making it highly compatible with older inverter models that do not require PWM (Pulse Width Modulation) control.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color: #16c8c8;\"\u003eSpace-Efficient Form Factor:\u003c\/strong\u003e The slim 25mm profile fits perfectly into the tight clearance areas typical of industrial chassis and VFD heat sinks.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong style=\"color: #16c8c8;\"\u003eRobust Bearing System:\u003c\/strong\u003e Built to withstand the constant vibrations and dust exposure inherent in factory floor environments, ensuring a longer mean time between failures (MTBF).\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003c!-- Troubleshooting FAQ --\u003e\n  \u003ch3 style=\"color: #0056b3; margin-top: 25px;\"\u003eMaintenance \u0026amp; Troubleshooting FAQ\u003c\/h3\u003e\n  \u003cdiv style=\"background-color: #fafafa; border: 1px solid #eeeeee; padding: 15px; border-radius: 4px;\"\u003e\n    \u003cp\u003e\u003cstrong\u003eQ1: My inverter is throwing an \"OH\" (Overheat) or Fan Failure alarm, but the 2-wire RUNDA fan doesn't have a sensor wire. How does the inverter know it failed?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cem\u003eA:\u003c\/em\u003e In systems using 2-wire fans like the RSH1225B2424A, the inverter typically detects fan failure indirectly. It either monitors the current draw on the 24V fan circuit (a dead fan draws 0 amps, a stalled fan draws excessive amps) or it relies entirely on internal heat sink temperature sensors. Replacing the dead fan usually clears the alarm automatically once temperatures normalize.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003eQ2: Can I install this fan backwards to change the airflow direction?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cem\u003eA:\u003c\/em\u003e Yes. The fan blade design is optimized to push air in one specific direction (usually indicated by an arrow molded into the plastic frame). To reverse the airflow relative to your heatsink, simply unmount the fan, flip the entire unit 180 degrees, and remount it. Do \u003cstrong\u003enot\u003c\/strong\u003e reverse the wiring polarity (connecting red to negative and black to positive), as this will damage the internal DC circuitry.\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003eQ3: The fan is making a loud grinding noise. Can it be lubricated?\u003c\/strong\u003e\u003cbr\u003e\n    \u003cem\u003eA:\u003c\/em\u003e Industrial ball bearing fans are sealed for life. A grinding or whining noise indicates that the internal ball bearings have mechanically worn out or lost their factory lubrication due to age and heat. It cannot be reliably repaired in the field; the fan must be replaced immediately to prevent inverter overheating.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Structured Data (JSON-LD) --\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 does an inverter detect a failure on a 2-wire RUNDA fan without a sensor wire?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The inverter monitors the current draw on the 24V circuit (a dead fan draws 0A, a stalled fan draws excess) or relies on internal heat sink temperature sensors to trigger an overheat alarm.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I reverse the wiring polarity to reverse the fan's airflow direction?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. Reversing the DC wiring polarity will damage the fan's internal circuitry. To reverse airflow, you must physically flip the fan frame 180 degrees before mounting.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I lubricate a noisy RUNDA RSH1225B2424A cooling fan?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. Industrial ball bearing fans are sealed for life. Grinding noises indicate mechanical wear of the bearings, and the unit must be replaced to prevent system overheating.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"RUNDA","offers":[{"title":"Default Title","offer_id":45430282223801,"sku":"155850891350","price":47.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_2f76cfd9-bd95-4f68-a8e8-dd5dd34abca2.jpg?v=1760484034","url":"https:\/\/koeed.com\/no\/products\/runda-rsh1225b2424a-12025-dc24v-0-17a-2-wire-inverter-cooling-fan","provider":"KOEED","version":"1.0","type":"link"}