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EFS-31 | 315A 500VDC 50kA aR Fast Acting Fuse
Elehub’s EFS-31 315A 50kA aR Fuse is a high-performance protective component engineered for the fast-paced demands of electric vehicle systems and industrial DC applications. With a breaking capacity of 50kA DC and 80kA AC, this fuse ensures rapid interruption of fault currents, minimizing damage to sensitive power electronics.
Designed according to IEC60269-4 and classified under operating class aR, this fast acting fuse provides precise protection for semiconductor components. It supports rated voltages of AC690V and DC500V, and current ratings ranging from 20A to 630A, making it ideal for versatile use across high-reliability power systems.
Specifications
| Specification | DATA |
|---|---|
| Rated Voltage: | AC690V / DC500V |
| Rated Current (A): | 20A~630A |
| Breaking Capacity: | AC80kA, DC50kA |
| Operation Class: | aR |
| Standard: | IEC60269-4 |
Dimension Drawing
Dimension Data
Applications
The EFS-31 aR fuse is widely used across electric vehicles and DC power environments requiring rapid fault protection. Its fast operation and high breaking capacity make it a crucial safety component in the following applications:
Electric Vehicles (EVs)
Protects powertrains, inverters, and battery modules from high fault currents.
DC Charging Stations
Ensures fast and safe disconnect during abnormal current surges.
Energy Storage Systems
Prevents overcurrent damage in battery banks and BMS.
Motor Controllers
Offers quick-response protection for industrial and commercial motor drives.
UPS Systems
Guards against short-circuit failures in backup power equipment.
Renewable Energy Systems
Secures PV inverters and converters in solar and wind systems.
Rail Transit Systems
Used in auxiliary and main traction power protection.
Telecom DC Power Systems
Protects rectifiers and converters in critical infrastructure.
Why Choose Us as an Electric Vehicle Fuse Supplier?
EV-Focused Innovation
We design fuses specifically for electric vehicles, ensuring optimal protection and system compatibility.
Reliable Quality Standards
Our fuses meet international safety and performance certifications, guaranteeing consistent and reliable performance under extreme EV conditions.
Broad Product Range
From compact passenger EVs to heavy-duty electric trucks, we offer a wide variety of fuse models to match diverse applications.
Compact & Lightweight
Space-saving designs fit perfectly within EV architecture without compromising performance or durability.
OEM Customization
Support for custom designs and ratings tailored to specific EV platform requirements and standards.
Quick and Reliable Delivery
Streamlined production and logistics systems ensure fast, on-time delivery to meet urgent customer demands.
FAQs
What is the breaking capacity of the EFS-31 aR fuse?
The EFS-31 features a high DC breaking capacity of 50kA and AC breaking capacity of 80kA.
Which voltages is the fuse rated for?
This fuse supports up to AC690V and DC500V for versatile use in industrial and EV systems.
What current ranges are available for this model?
The EFS-31 is available in rated currents from 20A to 630A, with 315A being one of the standard options.
What does operating class aR mean?
aR fuses are designed for semiconductor protection and interrupt short-circuits quickly, but not overloads.
Is this fuse suitable for electric vehicles?
Yes, the EFS-31 is specifically developed for electric vehicle applications including battery and inverter protection.
Which standards does the fuse comply with?
It is designed according to the IEC60269-4 standard, ensuring international compatibility and performance.
How fast does this fuse respond to faults?
As a fast-acting fuse, it reacts nearly instantaneously to short-circuit conditions, protecting critical components.
Can it be used in AC and DC systems?
Yes, the EFS-31 is suitable for both AC and DC systems, with appropriate voltage and current ratings.
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