SINOFUSE RS309-MD-50A High-Speed Fuse, 50A, AC/DC 500V
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SINOFUSE RS309-MD-50A is an RS309-MD Series round tube bolt-connected high-speed fuse rated 50A and AC/DC 500V. It is specified for aR utilization category protection with low I²t values and high breaking capacity for industrial power and rectifier protection applications.
| Product ID / MPN | RS309-MD-50A |
| Brand / Series / Category | SINOFUSE RS309-MD Series High-Speed Fuse |
| Rated Voltage | AC/DC 500V |
| Rated Current | 50A |
| Utilization Category | aR |
| Breaking Capacity | AC 200kA; DC 50kA, time constant ≤15ms |
| Pre-Arcing I²t | 190 A²s |
| Operating I²t | 750 A²s |
| Rated Power Dissipation | 8W |
| Size Code | 3XA |
| Mounting / Terminal / Connection | Bolt-connected cylindrical fuse; M8 mounting bolt; recommended torque 12±1 N.m |
| Environmental Ratings | Normal ambient operating condition -5°C to 40°C; allowable operating condition -40°C to 120°C |
| Standards / Certifications | UL248; IEC60269; ISO8820; GB/T 31465; CE; UL; RoHS |
| Installation Notes | Recommended long-term current value should not exceed 80% of rated current |
This RS309-MD-50A fuse is typically used for short-circuit, overload, and backup protection in electric vehicle drive power systems, power conversion systems, energy storage and power systems, variable frequency controllers, chargers, conductors, and other vehicle-related devices and equipment.
Apexon Supply provides B2B sourcing and replacement support for SINOFUSE high-speed fuses using verified product identifiers, ratings, I²t values, mounting data, and application requirements for procurement review and technical alignment.
Send the MPN, required quantity, and application requirements to request a B2B quote and confirm sourcing options for this high-speed fuse.
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