SINOFUSE RSZ307-5-W7P High-Speed Semiconductor Fuse Series, 1000-2500A, 1200VDC UL / 1000VDC IEC
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The SINOFUSE RSZ307-5-W7P is a high-speed semiconductor fuse series covering rated currents from 1000A to 2500A. The series is rated DC1200V under UL requirements and DC1000V under IEC requirements, with an aR utilization category and a 100kA breaking capacity. All listed models use the same flat-terminal bolted construction and are intended for short-circuit and backup protection in power, rectification, and power-conversion equipment. The series provides ten verified current ratings, allowing procurement teams to select the required model according to circuit current, I²t performance, and power-loss requirements.
RSZ307-5-W7P Series Overview
The RSZ307-5-W7P family is designed as a common mechanical and electrical platform with rated current as the primary model differentiator. The manufacturer specifies performance with reference to IEC 60269 and UL 248.13. The complete verified range includes 1000A, 1250A, 1400A, 1500A, 1700A, 1800A, 2000A, 2200A, 2400A, and 2500A models. The manufacturer also states UL certification and RoHS compliance for the series.
Technical Specifications
| Specification | Series Data |
|---|---|
| Rated Voltage | DC1200V (UL) / DC1000V (IEC) |
| Rated Current Range | 1000-2500A |
| Utilization Category | aR |
| Breaking Capacity | 100kA, time constant 10-15ms |
| Standards / Compliance | IEC 60269; UL 248.13; UL certified; RoHS compliant |
| Connection / Mounting | Flat-terminal bolted connection; M10 stud and nut installation; recommended torque 21±1N·m |
| Operating Conditions | Normal ambient temperature -5°C to 40°C; permitted range -40°C to 85°C |
Technical data reference: SINOFUSE RSZ307-5-W7P 1200V Series High-Speed Fuse Selection Specification, document ZR/YC-0231-01 A3.
RSZ307-5-W7P Model Selection
Select the required RSZ307-5-W7P model primarily by rated current, then compare the manufacturer-specified pre-arcing I²t, total fusing I²t, and power loss. The listed I²t values are specified at DC1220V. SINOFUSE recommends that long-term operating current should not exceed 80% of the fuse rated current under normal operating conditions. Confirm the complete MPN and the electrical and mechanical requirements of the protected equipment before replacement or ordering.
| Exact MPN | Rated Current | Electrical Performance |
|---|---|---|
| RSZ307-5-W7P-1000A1200V | 1000A | Pre-arcing I²t: 371kA²s; total I²t: 1073kA²s; power loss: 38W at 0.5In / 179W at In |
| RSZ307-5-W7P-1250A1200V | 1250A | Pre-arcing I²t: 590kA²s; total I²t: 1710kA²s; power loss: 47W at 0.5In / 228W at In |
| RSZ307-5-W7P-1400A1200V | 1400A | Pre-arcing I²t: 780.5kA²s; total I²t: 2264kA²s; power loss: 52W at 0.5In / 248W at In |
| RSZ307-5-W7P-1500A1200V | 1500A | Pre-arcing I²t: 942kA²s; total I²t: 2731kA²s; power loss: 54W at 0.5In / 258W at In |
| RSZ307-5-W7P-1700A1200V | 1700A | Pre-arcing I²t: 1244kA²s; total I²t: 3606kA²s; power loss: 61W at 0.5In / 290W at In |
| RSZ307-5-W7P-1800A1200V | 1800A | Pre-arcing I²t: 1480kA²s; total I²t: 4292kA²s; power loss: 62W at 0.5In / 296W at In |
| RSZ307-5-W7P-2000A1200V | 2000A | Pre-arcing I²t: 1854kA²s; total I²t: 5375kA²s; power loss: 69W at 0.5In / 323W at In |
| RSZ307-5-W7P-2200A1200V | 2200A | Pre-arcing I²t: 2360kA²s; total I²t: 6835kA²s; power loss: 73W at 0.5In / 347W at In |
| RSZ307-5-W7P-2400A1200V | 2400A | Pre-arcing I²t: 2871kA²s; total I²t: 8327kA²s; power loss: 78W at 0.5In / 354W at In |
| RSZ307-5-W7P-2500A1200V | 2500A | Pre-arcing I²t: 3330kA²s; total I²t: 9320kA²s; power loss: 88W at 0.5In / 375W at In |
Verified Applications
SINOFUSE specifies the RSZ307-5-W7P series for power, rectification, and power-conversion applications, where the fuse provides equipment short-circuit and backup protection. The aR utilization category should be considered together with the protected circuit requirements when selecting the appropriate current rating.
B2B Sourcing and Replacement Support
Apexon Supply provides B2B sourcing support for the SINOFUSE RSZ307-5-W7P series. For replacement sourcing, confirm the complete manufacturer MPN, rated current, required voltage rating, mechanical connection, and relevant circuit-protection requirements before ordering.
For an RFQ, submit the required RSZ307-5-W7P MPN, quantity, equipment or application details, and any technical requirements that need verification. Apexon Supply can assist with model identification, manufacturer-document-based specification review, and sourcing alignment for industrial procurement requirements.
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