SINOFUSE RS309-MF-S275A High-Speed Cylindrical Bolt-On Fuse, 275 A, 700 V AC/DC (IEC) / 750 V DC (UL)
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The SINOFUSE RS309-MF-S275A is a 275 A high-speed cylindrical bolt-on fuse in the RS309-MF-S series. It has an aR utilization category, size code 6TA, and M10 bolt mounting. Its voltage ratings are 700 V AC/DC under IEC and 750 V DC under UL.
| Model | RS309-MF-S275A |
| Rated current | 275 A |
| Rated voltage | IEC: 700 V AC/DC; UL: 750 V DC |
| Utilization category | aR |
| Breaking capacity | AC: 100 kA; DC: 50 kA at a time constant ≤ 15 ms |
| I²t values | Pre-arcing: 15,300 A²s; total clearing: 49,700 A²s. Datasheet test values were measured under DC conditions, with time constants and connections referenced to IEC 60269 / UL 248. |
| Power dissipation | 51 W |
| Size code | 6TA |
| Mounting | M10 bolts; recommended tightening torque 21 ± 1 N·m |
Typical applications: Short-circuit protection in electric vehicle drive systems, power conversion equipment, energy storage systems, variable-frequency controllers, and chargers, subject to application-specific selection and protection coordination.
B2B sourcing and replacement support: Submit the exact model and equipment requirements to Apexon Supply for a sourcing enquiry. Include the existing fuse label, mounting dimensions, circuit voltage, and protection requirements for replacement comparisons.
Request a quotation: Send your RFQ for SINOFUSE RS309-MF-S275A with the required quantity, destination, and documentation requirements.
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