SINOFUSE RSZ307-3-RAZ-400A1500V High-Speed Square Body Fuse, 400A, 1500VDC
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SINOFUSE RSZ307-3-RAZ-400A1500V is a high-speed square body fuse from the RSZ307-3-RAZ Series, rated at 400A and 1500VDC. Designed for high-power DC and power-electronic applications, it provides fast fault-current interruption and effective current-limiting protection for sensitive electrical equipment.
The RSZ307-3-RAZ series features a rated breaking capacity of 250kA with a time constant of ≤5 ms. The 400A version provides a pre-arcing I²t of 39,400 A²s, total clearing I²t of 168,000 A²s, and rated power loss of 155W. The series is designed according to IEC 60269-4 and UL 248-13 requirements and carries UL, TÜV and RoHS compliance.
| Brand | SINOFUSE |
| Part Number | RSZ307-3-RAZ-400A1500V |
| Series | RSZ307-3-RAZ |
| Product Type | High-Speed Square Body Fuse |
| Rated Current | 400A |
| Rated Voltage | 1500VDC |
| Size Code | 3 |
| Rated Breaking Capacity | 250kA |
| Time Constant | ≤5 ms |
| Pre-Arcing I²t @ DC1600V | 39,400 A²s |
| Total Clearing I²t @ DC1600V | 168,000 A²s |
| Power Loss | 155W |
| Weight | 2350 ± 100 g |
| Mounting Method | M8 Bolt and Nut |
| Recommended Torque | 11 ± 1 N·m |
| Maximum Package Quantity | 6 Pieces |
| Standards | IEC 60269-4 / UL 248-13 |
| Certifications / Compliance | UL, TÜV, RoHS |
RSZ307-3-RAZ Series
The SINOFUSE RSZ307-3-RAZ 1500VDC series covers rated currents from 100A to 630A. Available current ratings include 100A, 125A, 160A, 200A, 250A, 315A, 350A, 400A, 450A, 500A, 550A and 630A. The RSZ307-3-RAZ-400A1500V is the 400A version of this series.
High-Speed Protection for DC Power Systems
The RSZ307-3-RAZ-400A1500V is intended for applications requiring rapid short-circuit interruption and effective limitation of fault energy. Its high breaking capacity and low I²t characteristics make it suitable for protection of high-power electronic equipment and DC power-conversion systems.
Typical Applications
- Power semiconductor protection
- High-voltage DC power systems
- Energy storage systems and power conversion equipment
- Industrial inverters and converters
- DC drives and rectifier systems
- High-power industrial electrical equipment
Ordering Information
When replacing an existing fuse, verify the complete model number RSZ307-3-RAZ-400A1500V, 400A current rating, 1500VDC voltage rating, Size 3 body configuration, M8 mounting arrangement and required I²t characteristics before ordering.
Contact Apexon Supply for current stock availability, quotation, lead time, technical documentation and alternative SINOFUSE RSZ307-3-RAZ series ratings.
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