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H075539 In stock

H075539 British Standard Fuse 250V, 450A

This part is obsolete, please contact our team for a modern day alternative on 01444 243 452 /

The H075539 British standard, high breaking capacity fuse offers protection for power semiconductors as per IEC standard 60269-1 and 60269-4.This fus ehas a 250V rating and complies with IEC33.

  • High breaking capacity
  • 450A
  • Available with or without indicator
  • Ideal for semiconductor protection
  • Formerly known as Ferraz Shawmut
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Semiconductor protection fuses are used to protect against overcurrent in power electronic equipment. Semiconductor fuses are specifically designed to reduce the I2t, peak let-through current and arc voltages during a fault to protect and isolate semiconductor components such as diodes, thyristors and SCRs.

Certifications & Approvals
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Typical Applications

  • Power semiconductor protection

Refer to manufacturer’s datasheet for full technical information.




IEC 60269-1 IEC 60269-4 IEC 33

Rated Current (A)


Rated Voltage (V)


Voltage Class


Type of Fuse Status Indicator


Breaking Capacity


Clearing (I2t)

170000 A2s

Product Type

British Standard Fuse, High Speed Fuse

Fuse Size/Group


Mersen is a global expert in electrical specialties and advanced materials for high-tech industries. Leading experts in the safety and reliability of electrical equipment, Mersen offer global electrical protection solutions, manufacturing a specialist range of fuses and fusegear.

Formerly known as Ferraz Shawmut, Mersen offers a comprehensive range of North American (UL and CSA) and European IEC (DIN, NF, BS) fuses, fusegear and fuse systems.

Mersen’s products prevent the destruction of industrial and commercial electrical equipment, ensure an uninterrupted power supply and help to stabilise the electrical network. The company’s industrial fuses and all related accessories prevent short circuits, and surge protection devices help to protect against damage from power surges.


Mersen, previously Ferraz Shawmut, is a leading manufacturer of circuit protection and offer a wide range of fuses that comply to various standards such as BS, IEC, DIN and many others. They also produce suitable fuse holders for easy access to replace blown fuses. They also have suitable microswitches and trip indicators available within their range.

Learn more about Mersen products by getting in touch with GD Rectifiers.

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