SINOFUSE RSZ307-4-S5P Series 1000VDC High-Speed Fuses
The SINOFUSE RSZ307-4-S5P Series is a high-speed DC fuse family designed for short-circuit and backup protection in high-current electrical systems. The series features a DC 1000V rated voltage and the aR utilization category.
According to the current SINOFUSE manufacturer product information, the RSZ307-4-S5P Series covers rated currents from 1250A to 1600A and provides a breaking capacity of 50kA.
These fuses are relevant to high-voltage DC distribution, charging infrastructure, lithium battery cabinets, and industrial power conversion applications where appropriate current-limiting protection is required.
Key Specifications
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Manufacturer: SINOFUSE
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Series: RSZ307-4-S5P
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Product Type: High-speed DC fuse
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Rated Voltage: DC 1000V
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Manufacturer-Listed Current Range: 1250A to 1600A
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Utilization Category: aR
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Breaking Capacity: 50kA
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Reference Standards: IEC 60269 and GB/T 13539
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Protection Application: Short-circuit and backup protection
Typical Applications
The RSZ307-4-S5P Series is intended for high-current electrical protection applications involving DC power systems and power conversion equipment.
- High-voltage DC distribution systems (HVDC)
- Lithium battery cabinets
- DC fast-charging infrastructure
- Industrial rectifier and converter systems
- Data center DC power equipment
- High-current short-circuit protection
- Backup protection for power-electronic equipment
RSZ307-4-S5P Model Selection
SINOFUSE currently identifies a 1250A–1600A current range for the RSZ307-4-S5P Series. The exact available models, mounting requirements, and electrical characteristics should be confirmed using the latest manufacturer documentation.
When selecting a replacement or specifying a new fuse, engineers should verify the following:
- Exact SINOFUSE part number
- DC system operating voltage
- Required rated current
- Prospective short-circuit current
- DC circuit time constant
- Time-current and I²t characteristics
- Mechanical dimensions and terminal configuration
- Mounting hardware and tightening torque
- Operating temperature and installation conditions
- Applicable certification requirements
Understanding the aR Protection Category
The RSZ307-4-S5P Series uses the aR utilization category, associated with partial-range high-speed fuse protection.
An aR fuse should not automatically be treated as a full-range overload protection device. Additional protective devices or appropriate system coordination may be required depending on the electrical installation.
Featured RSZ307-4-S5P Product
Explore the RSZ307-4-S5P 1250A 1000V model currently listed in the Apexon Supply product catalog:
SINOFUSE RSZ307-4-S5P 1250A 1000V High-Speed Fuse
For other current ratings or sourcing inquiries, please provide the required manufacturer part number and quantity. Product availability and exact specifications should be confirmed before ordering.
Related SINOFUSE Technical Resources
For additional SINOFUSE fuse families, technical guides, and circuit protection products, explore:
Series Selection Note: RSZ307-4-S5P and RSZ307-5-W7P are separate fuse families. Similar rated voltages or current ratings do not establish electrical or mechanical interchangeability.
RSZ307-4-S5P Technical Guide
For detailed specifications, protection characteristics, model selection considerations, installation requirements, and application information, visit:
SINOFUSE RSZ307-4-S5P 1000VDC High-Speed Fuse Technical Guide
Industrial Sourcing Support
Apexon Supply supports global B2B sourcing for SINOFUSE and related circuit protection products. We assist industrial buyers with product identification, specification review, technical cross-reference, model selection, and international sourcing coordination.
For RSZ307-4-S5P availability, technical information, or quotation requests, please provide the exact part number, rated current, required quantity, and relevant application information.
