SINOFUSE RS306-3-T5Z High-Speed Semiconductor Fuse Series, 315–1400A, aR
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SINOFUSE RS306-3-T5Z is a bolt-connected high-speed semiconductor fuse series covering 14 verified current ratings from 315A to 1400A. The 315A through 1100A models are rated AC1250V/DC1000V, while the 1250A and 1400A models are rated AC1100V/DC800V. All included models use size code 3 construction and the aR utilization category, with a specified breaking capacity of AC 100kA and DC 50kA. This series is intended for short-circuit overcurrent and backup protection where low I²t, current limitation, and high breaking capability are required. The model matrix below supports exact-MPN identification and technical comparison for procurement.
RS306-3-T5Z Series Overview
The RS306-3-T5Z range is the size code 3 T5Z group within the SINOFUSE RS306 high-speed fuse family. The manufacturer specifies bolt-and-nut installation using M10 hardware with a recommended mounting torque of 21 N·m. Size code 3 dimensions are A 81 ± 2 mm, B 107 ± 2.5 mm, C 139 ± 3 mm, D 74 ± 1.5 mm, H 11 ± 0.5 mm, and F 32 ± 0.5 mm. The series is specified for 45–62 Hz AC operation and partial-range aR protection.
Technical Specifications
| Specification | Series Data |
|---|---|
| Utilization Category | aR (UL) |
| Breaking Capacity | AC 100 kA / DC 50 kA, L/R 10–15 ms |
| AC Rated Frequency | 45–62 Hz |
| Size Code | 3 |
| Recommended Installation | M10 bolt and nut, 21 N·m recommended torque |
| Standards and Compliance | IEC 60269 / UL 248; GB/T 31465; CE; RoHS |
| Normal Ambient Temperature | -5°C to 40°C |
| Permitted Ambient Temperature | -40°C to 85°C |
Technical data reference: SINOFUSE RS306 AC1250V/DC1000V High-Speed Fuse Selection Specification.
RS306-3-T5Z Model Selection
The RS306-3-T5Z series includes verified rated-current options from 315A through 1400A. Select by required current rating and confirm the corresponding voltage rating, pre-arcing I²t, total I²t, and power loss against the protected circuit or equipment requirements. The 1250A and 1400A variants have lower AC/DC voltage ratings than the 315A through 1100A models. Confirm the complete MPN and electrical and mechanical requirements before ordering or evaluating a replacement.
| Exact MPN | Rated Current | Rated Voltage | Pre-Arcing I²t | Total I²t | Power Loss |
|---|---|---|---|---|---|
| RS306-3-T5Z-315A1250V-D | 315A | AC1250V / DC1000V | 9,700 A²s | 56,000 A²s | 83 W |
| RS306-3-T5Z-350A1250V-D | 350A | AC1250V / DC1000V | 14,000 A²s | 80,000 A²s | 88 W |
| RS306-3-T5Z-400A1250V-D | 400A | AC1250V / DC1000V | 20,000 A²s | 110,000 A²s | 94 W |
| RS306-3-T5Z-450A1250V-D | 450A | AC1250V / DC1000V | 31,500 A²s | 175,000 A²s | 98 W |
| RS306-3-T5Z-500A1250V-D | 500A | AC1250V / DC1000V | 40,000 A²s | 220,000 A²s | 103 W |
| RS306-3-T5Z-550A1250V-D | 550A | AC1250V / DC1000V | 55,000 A²s | 310,000 A²s | 108 W |
| RS306-3-T5Z-630A1250V-D | 630A | AC1250V / DC1000V | 84,000 A²s | 480,000 A²s | 114 W |
| RS306-3-T5Z-700A1250V-D | 700A | AC1250V / DC1000V | 118,000 A²s | 680,000 A²s | 118 W |
| RS306-3-T5Z-800A1250V-D | 800A | AC1250V / DC1000V | 210,000 A²s | 980,000 A²s | 123 W |
| RS306-3-T5Z-900A1250V-D | 900A | AC1250V / DC1000V | 308,000 A²s | 1,400,000 A²s | 130 W |
| RS306-3-T5Z-1000A1250V-D | 1000A | AC1250V / DC1000V | 455,000 A²s | 2,000,000 A²s | 134 W |
| RS306-3-T5Z-1100A1250V-D | 1100A | AC1250V / DC1000V | 580,000 A²s | 2,650,000 A²s | 139 W |
| RS306-3-T5Z-1250A1100V-D | 1250A | AC1100V / DC800V | 805,800 A²s | 3,948,550 A²s | 144 W |
| RS306-3-T5Z-1400A1100V-D | 1400A | AC1100V / DC800V | 1,249,800 A²s | 5,980,000 A²s | 149 W |
Verified Applications
SINOFUSE identifies applications including rail transit, electric vehicles, and ships. The RS306 family is also specified for short-circuit overcurrent and backup protection in energy-storage systems, power systems, conductors, and other components and equipment.
B2B Sourcing and Replacement Support
Apexon Supply provides independent B2B sourcing support for the SINOFUSE RS306-3-T5Z series, including exact model identification, specification review, and sourcing assistance for industrial procurement and replacement requirements. Electrical ratings, mechanical fit, and the complete manufacturer MPN should be confirmed before replacement.
For RFQ review, submit the required RS306-3-T5Z current rating, complete MPN, quantity, and application requirements so Apexon Supply can review sourcing options and technical alignment.
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