{"product_id":"sinofuse-rs309-mf-350a-750v-fuses","title":"Sinofuse RS309-MF-350A High-Speed Bolt-Mounted Fuse, 350A, DC750V UL","description":"\u003cp\u003e\u003cstrong\u003eSinofuse RS309-MF-350A\u003c\/strong\u003e is an RS309-MF cylindrical bolt-mounted high-speed fuse for circuit protection in power electronics, EV power systems, energy storage, drive systems, chargers, conductors, and related vehicle equipment. Verified ratings include 350A rated current, AC\/DC700V under IEC, DC750V under UL, aR utilization category, and high breaking capacity for short-circuit, overload, and backup protection.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 13px; margin-top: 20px; font-family: sans-serif;\"\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eProduct ID \/ MPN\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eRS309-MF-350A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eSinofuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eSeries \/ Category\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eRS309-MF high-speed cylindrical bolt-mounted fuse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eRated Current\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003e350A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eRated Voltage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eAC\/DC700V IEC; DC750V UL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eUtilization Category\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eaR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eBreaking Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eAC100kA; DC50kA, time constant ≤15ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eI²t Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003ePre-arcing 23700 A²s; operating 86500 A²s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eRated Power Dissipation\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003e64W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eSize Code\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003e7TA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eMechanical Specs\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eDimensions: A 129mm, B 49mm, C 72mm, D 89.5mm, E 109mm, F 10.5mm, G 38mm, H 6mm; weight 447±15g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eMounting \/ Connection\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eM10 mounting bolt; recommended torque 21±1N.m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eEnvironmental Ratings\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eNormal ambient operating condition -5°C to 40°C; permitted ambient operating condition -40°C to 85°C; pollution degree III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eStandards \/ Certifications\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003ePerformance conforms to UL248 and IEC60269; CE and UL certified; RoHS compliant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e0e0e0;\"\u003e\n\u003ctd style=\"padding: 8px 10px; background-color: #f9f9f9; font-weight: bold; width: 35%; color: #333; line-height: 1.5; vertical-align: top;\"\u003eInstallation Notes\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; color: #555; line-height: 1.5; vertical-align: top;\"\u003eRecommended long-term current should not exceed 80% of rated current; fuse may be mounted vertically, horizontally, or inclined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eTypical applications include electric vehicle drive power systems, power conversion systems, energy storage and power systems, variable-frequency controllers, chargers, conductors, and vehicle equipment requiring short-circuit, overload, or backup protection.\u003c\/p\u003e\n\u003cp\u003eApexon Supply supports B2B sourcing and replacement review for Sinofuse RS309-MF-350A fuses, helping procurement teams compare verified electrical ratings, I²t values, mounting requirements, and dimensional data against equipment requirements.\u003c\/p\u003e\n\u003cp\u003eSend the MPN, required quantity, and application details for RFQ support. Most qualified RFQs receive a response or quote within 12 hours.\u003c\/p\u003e","brand":"Sinofuse","offers":[{"title":"1 pcs","offer_id":53542559973655,"sku":null,"price":50.0,"currency_code":"USD","in_stock":true},{"title":"3 pcs","offer_id":53542560006423,"sku":null,"price":130.0,"currency_code":"USD","in_stock":true},{"title":"6 pcs","offer_id":53542560039191,"sku":null,"price":240.0,"currency_code":"USD","in_stock":true},{"title":"12 pcs","offer_id":53542560071959,"sku":null,"price":460.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0837\/9210\/1655\/files\/image_fa88acd2-7cde-4795-8419-25ea31840152.webp?v=1781610726","url":"https:\/\/www.apexonsupply.com\/products\/sinofuse-rs309-mf-350a-750v-fuses","provider":"Apexon Solutions LLC","version":"1.0","type":"link"}