MRO RGS4 High-Speed Fuse 690V 50kA 10A-110A Bolted Type
$5.00 ( Not real price )
MRO RGS4 High-Speed Fuse: Bolted-type ceramic fuse (77mm × 61mm) for 690V AC, 50kA breaking capacity, 10A–110A ratings. Protects air conditioner inverters, semiconductors, VFDs, and industrial motors from short circuits.
The MRO RGS4 is a bolt-mounted, ceramic-body high-speed (aR) fuse designed for 690V AC industrial circuits, offering 50kA breaking capacity and 10A–100A current ratings to protect semiconductors and high-voltage equipment from short circuits.
Specifications
| Parameter | Details |
|---|---|
| Brand | MRO (Mingrong) |
| Model | RGS4 |
| Rated Voltage | 690V AC |
| Rated Current | 10A, 16A, 20A, 25A, 30A, 32A, 35A, 40A, 45A, 50A, 55A, 63A, 70A, 75A, 80A, 85A, 90A, 100A，110A |
| Breaking Capacity | 50kA (high interrupting) |
| Construction | Bolted type, ceramic body, quartz sand filled |
| Protection Class | aR (semiconductor short-circuit protection) |
| Dimensions | 77mm (Total length) × 61mm ( center distance for mounting) |
| Standards | IEC 60269-4, GB 13539.4 |
Applications
- AC Inverter & VFD Protection: Safeguards variable-frequency drives in HVAC, air conditioners, and industrial motors.
- Semiconductor Device Protection: Protects IGBTs, thyristors, and rectifiers in power converters and UPS systems.
- Industrial Motor Control: Shields motor control units and soft starters from catastrophic short circuits.
- Renewable Energy Systems: Used in solar inverters and wind power converters for high-voltage DC/AC protection.
- High-Voltage Distribution Panels: Provides main circuit protection in 690V industrial switchgear and control cabinets.
FAQ
Is this fuse suitable for air conditioner inverter circuits?
Yes. The RGS4 is ideal for 690V AC inverter compressors in HVAC and air conditioning systems, providing critical short-circuit protection for sensitive semiconductor components.
What is the difference between RGS4 and ordinary slow-blow fuses?
RGS4 is a high-speed (fast-acting) aR fuse that blows in milliseconds to protect semiconductors. Ordinary slow-blow fuses tolerate temporary overloads and are not designed for semiconductor protection.
Can I replace a 30A fuse with a 40A RGS4 model?
No. Always match the original rated current. Using a higher ampere fuse risks equipment damage and fire hazards as it will not blow at the designed current threshold.
Does this fuse come with a replacement base?
This listing is for the fuse link only. Bases (with/without indicator lights) are sold separately.
How fast does the RGS4 fuse blow during a short circuit?
The RGS4 operates in <10 milliseconds under short-circuit conditions, effectively limiting fault current and protecting expensive semiconductor devices.
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