British standard BS88 Fuse Manufacturer

HIITIO BS88 fuse is specifically designed and tested to provide best-in-class overcurrent and short-circuit protection for electric vehicle management systems and charging systems, with its small size and fast-breaking speed.

HCHVT500 Series. 10 400A500Vdc fuse bs88
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British standard BS88 fuse

As a prominent electrical components manufacturer, HIITIO specializes in high-voltage DC applications. We hold prestigious certifications, including ISO9001, ISO14001, ISO45001, and IATF16949, attesting to our commitment to quality, environmental responsibility, occupational health and safety, and automotive industry standards.

There are four series of fuses designed to ensure the safety of power systems. HIITIO BS88 fuses are up to 750VDC in ratings from 10 – 500A with a max breaking capacity of 50kA.

Due to its compact design and high breaking capacity, BS88 fuses are ideal for the protection of battery pack, EV management system, EV charging system and so on.

Features of HIITIO BS88 Fuse

High Current and Voltage Rating

  • HIITIOBS88 fuses excel in their ability to handle high current and voltage levels, making them suitable for demanding applications in various industries.
  • Their robust design allows them to accommodate substantial electrical loads, ensuring reliable performance in environments where elevated currents and voltages are prevalent.

Space-Efficient Design

  • Ingeniously designed with a minimum diameter of just 18mm to optimize space utilization, a critical consideration in today’s compact and densely configured electrical systems.
  • Not only facilitates easy integration into existing setups,but also contributes to the overall efficiency of the electrical infrastructure by minimizing the footprint of the protective components.

Excellent Breaking Capacity

  • HIITIO BS88 fuses boast an exceptional breaking capacity, signifying their ability to safely and swiftly interrupt the flow of current under fault conditions. The maximum breaking capacity is up to 50kA, and the fault current can be broken within 0.0001s.
  • This attribute is vital in preventing damage to connected devices and circuits during overcurrent events. The high breaking capacity ensures that the fuses can handle the elevated fault currents associated with high-power DC applications, contributing to the overall reliability and safety of the electrical system.

Strict Adherence to Safety Standards

  • Strictly adhere to UL248.1 / UL248.13 / IEC60269.1 / IEC60269.4 / GB13539.1 / GB13539.4 / JASO-D622 standards, underscoring commitment to providing a secure and reliable solution for electrical circuit protection.
  • Manufactured according to IATF16949 quality system and certified by CE, promoting a secure operational environment and minimizing the risk of electrical incidents.


Competitive Price

  • Optimized supply chain, establishing close ties with reliable suppliers
  • Plan procurement, managing inventory
  • Optimized supplier delivery structures

Production capacity

  • 4 semi-automatic production lines and 1 fully automated production line to further enhance productivity and quality control

Quality Control

Comprehensive Certifications

  • UL, cUL, CSA, CE, CB, TUV, SEMKO, CCC, VDE, and more.
  • Actively researching customer needs and industry trends, seeking additional certifications.

R&D Capability

  • Independent laboratory for electrical life testing, breaking capacity testing, high and low temperature testing, etc. 
  • 30+ people R&D team with 10+ years developing experience


  • Pre-sales Services: product consultation, technical support, customized solutions, sample service, and fast delivery.
  • After-sales Services: Respond to your questions and complaints in a timely manner and provide the best solution.

All you should know about BS88 Fuse

What does the voltage drop of the fuse indicate?

The voltage drop of a fuse is the voltage drop across the fuse under rated current conditions. It reflects the internal resistance of the fuse, and its value should not be too large. 

If a fuse with too large internal resistance (voltage drop) is installed in the circuit, it will affect the system parameters of the circuit and cause the circuit to not work properly. 

The standard not only stipulates the upper limit of the voltage drop value but also stipulates its consistency. If you would like to know the resistance data of HIITIO fuses, please contact us.

What is the difference between Melting I2t, arcing I2t and Clearing I2t?

In the event of a short circuit, the fusible element begins to melt and then separates within milliseconds. The heat energy generated by a fuse during fault current breaking is usually expressed in joules, often called

A2s or I2t

It is proportional to the square of the current (‘I’ in amperes) during operation (‘t’ in seconds). The heat energy generated is expressed as melting I2t, arcing I2t and clearing I2t.

Melting I2t

This is the amount of heat energy that passes through the fuse after an overcurrent occurs until the fuse element melts. It is equal to the RMS current squared times the melting time.

Arcing I2t

This is the heat energy passing through the fuse during the arc discharge. It is equal to the root mean square arc discharge current squared times the arc discharge time.

Clearing I2t

Also known as total clearing I2t, this is the I2t flowing through the current device from the beginning of the overcurrent until the current is completely interrupted. Clearing I2t is the sum of melting I2t and arcing I2t.

How to use the fuse temperature derating curve?

BS88 fuse temperature derating curve

The current carrying capacity of a fuse depends on the operating ambient temperature conditions of the application in which it is used. It decreases as the ambient temperature increases and vice versa. The temperature derating curve can be used to determine this change in the current carrying capacity of the fuse over the operating temperature range. 

The temperature derating curve shows the widest ambient temperature range (X-axis) over which the fuse can operate safely (also called the operating temperature range), and the corresponding derating factor to be applied to the rated current of the fuse.

The following figure is an example, assuming that a 100A fuse is used and the ambient temperature is 60℃. It can be seen from the curve in the figure that the derating coefficient is 0.8 at 60℃. Therefore, an 80A fuse should be used in this case (100A * 0.8 = 80A)

What is the significance of paying attention to the temperature rise of the fuse?

The temperature rise of the fuse refers to the temperature rise value of the fuse when 1.1 times (110%) of the rated current flows through the fuse, that is, the measured temperature minus the ambient temperature. The UL standard sets the upper limit at 75℃. 

Because the melt of the fuse is relatively sensitive to temperature, its fusing point and impedance will change under the action of a certain high temperature for a long time, and this change will affect the accuracy of the fuse. This is commonly referred to as fuse aging.

Aging fuses are very dangerous when used in circuits. Therefore, we should pay attention to the temperature rise of the fuse when designing and using fuses. In the same way, we should also note that even if the fuse has not blown after a long period of use, it may have aged, and it is best to replace it at this time.

Applications of BS88 Fuse

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Battery Pack Protection

BS88 fuses play a pivotal role in safeguarding battery packs used in various applications, including electric vehicles, renewable energy storage, and uninterruptible power supplies (UPS). 

In battery systems, these fuses protect against overcurrent conditions, ensuring the longevity and safety of the batteries. The high current and voltage ratings of BS88 fuses make them particularly well-suited for battery applications where robust protection is essential. 

Whether in electric cars or stationary energy storage systems, BS88 fuses contribute to the reliability and safety of battery packs.

Power Supply PDU for EV Bev Hev Phev Fcv

HV Power Distribution Unit

High-voltage power distribution units (PDUs) provide power to all critical loads within an electric vehicle (EV) system, while providing reliable protective circuit protection solutions for electrical and electronic components as well as vehicle occupants. BS88 fuses are employed in these distribution units to protect downstream devices and circuits from overcurrent events. 

The space-efficient design of BS88 fuses is advantageous in the often compact environments of power distribution units, allowing for streamlined integration without compromising safety. This application ensures that electrical loads receive reliable and protected power from the distribution unit. 

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EV Charging Equipment

The charging infrastructure for electric vehicles relies on DC power, and BS88 fuses find application in EV charging equipment. These fuses protect the charging circuits from overcurrent conditions that may arise during the charging process.

With the ability to handle high currents and voltages, BS88 fuses contribute to the safety and efficiency of EV charging stations. Their use ensures that the electrical components within the charging equipment are shielded from potential faults, offering a reliable and secure charging experience for electric vehicles.


Yes, we have customers in the United States and Europe. For more information, please contact us.

Yes, we have a distributor policy. Warmly welcome you to discuss with us.

Sure, we can provide free samples after evaluation.

When there is inventory, the delivery time is within a week If there is no inventory, the delivery time is subject to order and will be as early as possible.

Yes, OEM and ODM are available.

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