SINOFUSE RS308-HB-4G High-Speed Semiconductor Fuse Series, 10–100A, 750VDC
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SINOFUSE RS308-HB-4G is a cylindrical bolt-connected high-speed semiconductor fuse series rated for 750VDC, with ten verified current options from 10A to 100A. The series uses the aR partial-range utilization category and a common 4G construction, with a DC breaking capacity of 50kA at a time constant below 11ms. Manufacturer data specifies M6 mounting bolts with a recommended tightening torque of 5.5 N·m. This page consolidates the shared technical data and exact model-level I²t and power-loss values to support procurement, comparison, RFQ preparation, and replacement review.
RS308-HB-4G Series Overview
The RS308-HB-4G family is identified by the manufacturer as a cylindrical bolt-connected fast fuse range. Its performance references IEC 60269, while environmental reliability is specified against ISO 8820, JASO D622, and GB/T 31465. The manufacturer also states conformity with the EU RoHS Directive. The fuse range provides partial-range protection with current-limiting and high-breaking-capacity characteristics, while the rated-current-specific I²t and power-loss data allow buyers to compare the electrical differences between models within the same mechanical family.
Technical Specifications
| Specification | Series Value |
|---|---|
| Rated Voltage | 750VDC |
| Rated Current Range | 10A–100A |
| Breaking Capacity | 50kA DC, time constant <11ms |
| Utilization Category | aR, partial-range protection |
| Construction / Size | Cylindrical bolt-connected fuse, size code 4G |
| Mounting | M6 mounting bolt; 5.5 N·m recommended torque |
| Performance Reference | IEC 60269 |
| Environmental Reliability References | ISO 8820, JASO D622, GB/T 31465 |
| Normal Ambient Temperature | -5°C to +40°C |
| Allowable Ambient Range | -40°C to +85°C; parameter correction may be required outside normal conditions |
Technical data reference: SINOFUSE RS308-HB-4G 750VDC Cylindrical Bolt-Connected Fast Fuse Selection Specification, document ZR/YC-0041 A2 (2018).
RS308-HB-4G Model Selection
The RS308-HB-4G range includes ten verified current options: 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, and 100A. Select the required model by rated current and compare pre-arcing I²t, total I²t, and power loss because these values vary by rating. All included models share the 750VDC rating, aR utilization category, 4G construction, and M6 mounting specification. Confirm the complete MPN and the electrical and mechanical requirements of the protected equipment before ordering or replacement.
| Exact MPN | Rated Current (Option) | Pre-Arcing I²t (A²s) | Total I²t (A²s) | Power Loss (W) |
|---|---|---|---|---|
| RS308-HB-4G10A 750VDC | 10A | 7 | 25 | 3.1 |
| RS308-HB-4G16A 750VDC | 16A | 20 | 70 | 4.6 |
| RS308-HB-4G20A 750VDC | 20A | 39 | 137 | 5.2 |
| RS308-HB-4G25A 750VDC | 25A | 51 | 178 | 7.1 |
| RS308-HB-4G32A 750VDC | 32A | 89 | 307 | 8.9 |
| RS308-HB-4G40A 750VDC | 40A | 136 | 471 | 11.2 |
| RS308-HB-4G50A 750VDC | 50A | 320 | 758 | 13.8 |
| RS308-HB-4G63A 750VDC | 63A | 356 | 1228 | 17.3 |
| RS308-HB-4G80A 750VDC | 80A | 611 | 2105 | 21.3 |
| RS308-HB-4G100A 750VDC | 100A | 990 | 3410 | 26 |
The listed I²t values are manufacturer typical data under 750VDC, 50kA, and an 11ms time-constant condition.
Verified Applications
The manufacturer identifies road-vehicle applications including electric-vehicle drive power systems, power conversion systems, energy-storage and traction batteries, energy-storage capacitors, variable-frequency controllers, chargers, conductors, and other vehicle components and equipment. The RS308-HB-4G series is specified for short-circuit and backup protection within this application scope.
B2B Sourcing and Replacement Support
Apexon Supply provides independent B2B sourcing support for the SINOFUSE RS308-HB-4G series, including difficult-to-find requirements. Submit the complete MPN, selected current rating, quantity, and application requirements for RFQ review. Confirm voltage, current rating, utilization category, I²t requirements, mounting, and mechanical fit before replacement. Contact Apexon Supply for sourcing options and technical alignment.
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