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SinoFuse RS309-MF-S100A RS309-MF-S Cylindrical Bolt-Mount Fast-Acting Fuse, 700V AC/DC (IEC) / 750V DC (UL), aR class, 100A - 3pcs
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$85.00 USD
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Overview
The SinoFuse RS309-MF-S100A is a cylindrical, bolt-mount fast-acting fuse designed for compact, high-reliability protection in EV powertrains, power conversion systems, energy storage, motor drives, and charging equipment. It offers low I²t, high interrupting capability, and strong resistance to vibration and shock. Supplied as a 3pcs pack.
- Voltage ratings: 700V AC/DC (IEC), 750V DC (UL)
- Utilization category: aR (semiconductor protection)
- High interrupting rating: 100kA AC, 50kA DC (time constant ≤15 ms)
- Low pre-arcing I²t for semiconductor protection
- Compact size; robust against vibration, shock, and wide temperature range
- Approvals: UL, CE; Compliant with UL248, IEC60269; RoHS compliant
Applications
- EV/HEV traction and auxiliary power systems
- Power converters, inverters, and motor controllers
- Energy storage systems and DC links
- On-board/off-board chargers and cabling protection
- General short-circuit, overload, and backup protection for vehicle electrical equipment
Specifications
| Brand | SinoFuse |
| Series | RS309-MF-S |
| MPN | RS309-MF-S100A |
| Pack Size | 3 pcs |
| Rated Current | 100 A |
| Voltage Rating (IEC) | 700 V AC/DC |
| Voltage Rating (UL) | 750 V DC |
| Utilization Category | aR |
| Interrupting Rating | AC 100 kA; DC 50 kA (τ ≤ 15 ms) |
| Pre-arcing I²t (A²s) | 1100 A²s (typical) |
| Melting I²t (A²s) | 4980 A²s (typical) |
| Power Loss (at rated current) | 25 W (approx.) |
| Size Code / Body | 3SA cylindrical, bolt-mount |
| Terminals / Mounting | Bolt connection, M8 |
| Recommended Torque | 12 ± 1 N·m |
| Approvals / Standards | UL, CE; conforms to UL248, IEC60269; safety and environmental reliability per ISO8820, GB/T 31465; RoHS compliant |
| Operating Ambient (normal) | -5°C to +40°C (allowed: -40°C to +120°C; apply derating above 40°C) |
| Recommended Continuous Current | ≤ 80% of rated current |
| Altitude (operation) | Normal: ≤ 2000 m; Allowed: ≤ 4500 m (derate current 2–5% per 1000 m in closed enclosures) |
| Storage Temperature | Product: -40°C to +120°C; Packaging: -40°C to +70°C |
| Vibration/Shock | Meets GB2423.10-2008 4.1.2.6, QC/T 413-2002; suitable for road vehicles; rail transit Class II environment |
| Dimensions | Cylindrical bolt-mount; refer to datasheet drawing for A–H details |
Installation and Safety Notes
- Ensure stable, low-resistance terminal contact; use recommended torque.
- Maintain required air/creepage distances; add insulating barriers where necessary.
- Do not replace under load unless equipment is designed for load-break operation.
- Periodic maintenance: remove dust/oxidation from conductive contacts; replace any devices with mechanical damage.
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