Sinofuse RS309-MF-500A High-Speed Bolt-Mounted Fuse, 500A aR, 750V UL
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Sinofuse RS309-MF-500A is an RS309-MF high-speed bolt-mounted fuse with 500A rated current, aR utilization category, and 7TD size code. The datasheet lists AC/DC700V under IEC and DC750V under UL, with high breaking capacity for industrial circuit protection and power electronics applications.
| Product ID / MPN | RS309-MF-500A |
| Brand / Series / Category | Sinofuse RS309-MF high-speed bolt-mounted fuse |
| Rated Voltage | AC/DC700V IEC; DC750V UL |
| Rated Current | 500A |
| Utilization Category | aR |
| Breaking Capacity | AC100kA; DC50kA, time constant ≤15ms |
| I²t Values | Pre-arcing 56000 A²s; melting 168000 A²s |
| Rated Power Loss | 105W |
| Size Code | 7TD |
| Mechanical Specs | A 180mm; B 49mm; C 72mm; D 106mm; E 145mm; F 13.5mm; G 38mm; H 6mm |
| Mounting / Terminal / Connection | M12 mounting bolt; recommended torque 28±1 N·m |
| Weight | 527±15g |
| Standards / Certifications | UL248; IEC60269; CE; UL; RoHS |
Typical applications include electric vehicle drive power systems, power conversion systems, energy storage and power systems, variable-frequency controllers, chargers, conductors, and vehicle electrical devices requiring short-circuit, overload, or backup protection.
Apexon Supply supports B2B sourcing and replacement review for Sinofuse RS309-MF-500A fuses. Buyers should verify current rating, voltage rating, utilization category, breaking capacity, size code, mounting bolt, torque requirement, and installation dimensions against the equipment documentation before replacement.
Send the MPN, required quantity, and application requirements for RFQ support. Most qualified RFQs receive a response or quote within 12 hours.
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