SINOFUSE RS308-HB-2G Bolt-Connected High-Speed Semiconductor Fuse Series, 16–180A, AC250V/DC170V
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SINOFUSE RS308-HB-2G is a cylindrical, bolt-connected high-speed semiconductor fuse series with 13 verified current ratings from 16A to 180A. The series is rated AC250V/DC170V and uses the aR utilization category for partial-range protection. Manufacturer data specifies a breaking capacity of 80kA at AC250V and 50kA at DC170V with a 10ms time constant. The 2G construction uses bottom-exit bolt connections with M6 mounting hardware. This page consolidates the exact selectable models, current ratings, I²t data and published power-loss values for technical comparison, procurement review and replacement sourcing.
RS308-HB-2G Series Overview
The RS308-HB-2G models share the same voltage class, aR protection category, cylindrical fuse construction and M6 bolted mounting arrangement. The manufacturer references IEC 60269-4 and UL 248-13 for performance, with environmental reliability references including ISO 8820, JASO D622 and GB/T 31465. SINOFUSE states that the RS308-HB-2G and RS308-HB-2G-HT specifications have completed CCC and UL certification, and the series is RoHS compliant. The manufacturer also recommends that long-term continuous current should not exceed 80% of the fuse rated current.
Technical Specifications
| Specification | Series Data |
|---|---|
| Product Type | Cylindrical bolt-connected high-speed semiconductor fuse |
| Rated Voltage | AC250V / DC170V |
| Rated Current Range | 16A–180A across 13 verified models |
| Utilization Category | aR |
| Breaking Capacity | AC250V at 80kA; DC170V at 50kA, 10ms time constant |
| Minimum Breaking Current | 4 × In |
| Connection / Mounting | Bottom-exit bolt connection, M6 mounting bolts |
| Recommended Mounting Torque | 6Nm ±1Nm |
| Unit Weight | 29.2 ±2g |
| Ambient Temperature | Normal: -5°C to 40°C; allowable: -40°C to 85°C subject to manufacturer guidance and correction requirements |
Technical data reference: SINOFUSE RS308-HB AC250V/DC170V Cylindrical Bolt-Connected Fast Fuse Selection Specification, document ZR/YC-0009 A5.
RS308-HB-2G Model Selection
The RS308-HB-2G series provides 13 verified rated-current options: 16A, 20A, 25A, 32A, 35A, 40A, 50A, 63A, 80A, 100A, 125A, 160A and 180A. Select the required model according to rated current, pre-arcing I²t, total fusing I²t and power loss, while confirming the AC/DC voltage, aR protection category and M6 mechanical connection required by the equipment. Confirm the complete MPN and electrical and mechanical fit before replacement. The published I²t values are typical data measured under the manufacturer's stated standard test conditions of AC277V with a 0.2 power factor.
| Exact MPN | Rated Current | Pre-Arcing I²t | Total I²t | Power Loss @ 0.5In | Power Loss @ In |
|---|---|---|---|---|---|
| RS308-HB-2G16A | 16A | 18 A²s | 258 A²s | 0.5W | 1.5W |
| RS308-HB-2G20A | 20A | 29 A²s | 403 A²s | 0.6W | 1.9W |
| RS308-HB-2G25A | 25A | 57 A²s | 790 A²s | 0.7W | 2.1W |
| RS308-HB-2G32A | 32A | 94 A²s | 1306 A²s | 0.9W | 2.7W |
| RS308-HB-2G35A | 35A | 116 A²s | 1612 A²s | 0.97W | 2.9W |
| RS308-HB-2G40A | 40A | 168 A²s | 2322 A²s | 1W | 3.2W |
| RS308-HB-2G50A | 50A | 262 A²s | 3628 A²s | 1.3W | 3.9W |
| RS308-HB-2G63A | 63A | 443 A²s | 6132 A²s | 1.6W | 4.9W |
| RS308-HB-2G80A | 80A | 788 A²s | 10900 A²s | 2W | 5.9W |
| RS308-HB-2G100A | 100A | 1270 A²s | 17560 A²s | 2.5W | 7.3W |
| RS308-HB-2G125A | 125A | 2058 A²s | 28445 A²s | 3W | 9.0W |
| RS308-HB-2G160A | 160A | 3402 A²s | 47020 A²s | 3.8W | 11.4W |
| RS308-HB-2G180A | 180A | 4500 A²s | 64000 A²s | 4.4W | 13.1W |
Verified Applications
SINOFUSE identifies this fuse family for short-circuit and backup protection of semiconductor equipment including variable-frequency drives, rectifiers, inverters and various power supplies. The manufacturer also lists batteries, motors and capacitors among applicable equipment and components. Selection should follow the requirements of the protected circuit and the manufacturer's installation, ambient-temperature and derating guidance.
B2B Sourcing and Replacement Support
Apexon Supply provides B2B sourcing support for the SINOFUSE RS308-HB-2G series, including exact-model identification and technical alignment for industrial procurement, MRO and replacement requirements. Confirm rated current, voltage, aR category, I²t characteristics, mounting arrangement and the complete model identification before replacing an existing fuse.
For RFQ review, submit the required rated current, complete MPN, quantity and application requirements. Apexon Supply can review sourcing options and help align the requested model with the documented electrical and mechanical specifications before ordering.
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