SINOFUSE RS308-HB-4G Cylindrical Bolt-Connected High-Speed Fuse Series, 10–100A, 750VDC, aR
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SINOFUSE RS308-HB-4G is a cylindrical bolt-connected high-speed fuse series with ten verified 750VDC models covering rated currents from 10A to 100A. The included variants share the 4G size code, aR utilization category, DC 50 kA breaking capacity, M6 mounting-bolt configuration, and a recommended mounting torque of 5.5 N·m. Individual models differ by rated current, pre-arcing I²t, total I²t, and power loss. This series page organizes the manufacturer-specified models into a single comparison matrix for exact-MPN identification, technical review, procurement, and B2B sourcing.
RS308-HB-4G Series Overview
The RS308-HB-4G group belongs to the SINOFUSE RS308-HB 750VDC high-speed fuse family. The manufacturer describes the RS308-HB as a cylindrical bolt-connected partial-range protection fuse with current-limiting and high breaking capability. For the 4G models shown here, the common mechanical configuration is size code 4G with M6 mounting bolts and a recommended installation torque of 5.5 N·m. The 4G group provides ten verified rated-current choices from 10A through 100A while maintaining the same 750VDC rating.
Technical Specifications
| Specification | Series Data |
|---|---|
| Rated Voltage | 750 VDC |
| Utilization Category | aR |
| Breaking Capacity | DC 50 kA |
| Size Code | 4G |
| Mounting Bolt | M6 |
| Recommended Mounting Torque | 5.5 N·m |
| Applicable Standards | IEC 60269; ISO 8820; JASO D622; GB/T 31465 |
| Compliance | CE; RoHS |
Technical data reference: SINOFUSE RS308-HB 750VDC product data.
RS308-HB-4G Model Selection
The verified RS308-HB-4G range includes 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, and 100A models. Select the required current rating and compare the corresponding pre-arcing I²t, total I²t, and power loss with the requirements of the protected circuit or equipment. Confirm the complete MPN, electrical ratings, and mechanical connection requirements before ordering or evaluating a replacement.
| Exact MPN | Rated Current | Pre-Arcing I²t | Total I²t | Power Loss |
|---|---|---|---|---|
| RS308-HB-4G10A 750VDC | 10 A | 7 A²s | 25 A²s | 3.1 W |
| RS308-HB-4G16A 750VDC | 16 A | 20 A²s | 70 A²s | 4.6 W |
| RS308-HB-4G20A 750VDC | 20 A | 39 A²s | 137 A²s | 5.2 W |
| RS308-HB-4G25A 750VDC | 25 A | 51 A²s | 178 A²s | 7.1 W |
| RS308-HB-4G32A 750VDC | 32 A | 89 A²s | 307 A²s | 8.9 W |
| RS308-HB-4G40A 750VDC | 40 A | 136 A²s | 471 A²s | 11.2 W |
| RS308-HB-4G50A 750VDC | 50 A | 320 A²s | 758 A²s | 13.8 W |
| RS308-HB-4G63A 750VDC | 63 A | 356 A²s | 1,228 A²s | 17.3 W |
| RS308-HB-4G80A 750VDC | 80 A | 611 A²s | 2,105 A²s | 21.3 W |
| RS308-HB-4G100A 750VDC | 100 A | 990 A²s | 3,410 A²s | 26 W |
Verified Applications
SINOFUSE identifies the RS308-HB family for road-vehicle applications, including electric-vehicle traction power systems, power-conversion systems, energy-storage and power batteries, energy-storage capacitors, variable-frequency controllers, chargers, conductors, and other vehicle components or equipment requiring short-circuit and backup protection.
B2B Sourcing and Replacement Support
Apexon Supply provides independent B2B sourcing support for the SINOFUSE RS308-HB-4G series, including exact model identification, variant comparison, and replacement-sourcing review. Confirm current rating, 750VDC system requirements, aR protection characteristics, I²t values, power loss, and M6 mechanical connection before replacement.
For RFQ review, submit the complete RS308-HB-4G MPN, required current rating, quantity, and application requirements so Apexon Supply can review sourcing options and technical alignment.
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