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MERSEN FUSE 9,5 URD 73 TT F 1100 PC73UD95V11CTF

MERSEN FUSE 9,5 URD 73 TT F 1100 PC73UD95V11CTF

High-speed Protistor® fuse with aR characteristic, rated 1100A, 950VAC IEC, 1000VAC UL, featuring striker indication and flush ends with metric threads for industrial semiconductor protection.

SKU: W300514Alt SKU: PC73UD95V11CTFMPN: W300514
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List Price £309.89 ex VAT
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Why Choose the Mersen W300514 Protistor® High-Speed Fuse?

The Mersen W300514 (PC73UD95V11CTF) is a Protistor® Size 73 high-speed square body semiconductor fuse engineered to provide exceptional protection for modern power electronic equipment. Designed for demanding industrial applications, it delivers ultra-fast fault interruption and current limitation to protect expensive semiconductor devices from destructive short-circuit currents.

Manufactured for the protection of diodes, thyristors, IGBTs and other power semiconductor devices, the W300514 combines high interrupting capacity with low let-through energy (I²t). Its square body construction, flush-end metric threaded terminals and integrated striker indicator make it ideal for industrial power conversion systems where reliability and rapid fault clearance are critical.

The W300514 is suitable for OEM equipment, maintenance and replacement applications where identical electrical ratings and mounting arrangements are required. Always ensure the replacement fuse matches the original specification before installation.

Key Advantages

  • Ultra-fast aR semiconductor protection.
  • Protects IGBTs, diodes, thyristors and rectifier assemblies.
  • Current-limiting design reduces damaging fault energy.
  • High interrupting capacity for demanding industrial systems.
  • Integrated striker indicator for fuse operation indication.
  • Designed and manufactured by Mersen for critical power electronics.

Key Features

  • Mersen Protistor® Size 73 square body fuse.
  • Manufacturer part number W300514.
  • Catalogue number PC73UD95V11CTF.
  • aR ultra-fast semiconductor protection characteristic.
  • Flush-end metric threaded connections.
  • Built-in striker indicator.
  • Silver-plated contact surfaces.
  • Low I²t design for improved semiconductor protection.

Designed for Critical Semiconductor Protection

The Mersen W300514 has been developed specifically for protecting modern power electronic equipment. Its ultra-fast operating characteristic limits fault energy before semiconductor devices reach damaging temperatures, helping minimise costly downtime and expensive component replacement.

The robust ceramic square body construction, silver-plated terminals and high interrupting capability make this fuse suitable for demanding industrial environments where dependable protection is essential.

Typical Applications

  • Variable frequency drives (VFDs).
  • Industrial motor drives.
  • Power converters.
  • Rectifier equipment.
  • Inverters.
  • UPS systems.
  • Renewable energy power converters.
  • Industrial power electronic equipment.

Technical Specifications

Item number W300514
Catalogue No PC73UD95V11CTF
Description Square Body High-Speed Fuse Protistor® Size 73 aR 950VAC IEC 1000VAC UL 1100A With Striker Flush ends metric threads
EAN/UPC Code 3605340329643
Rated voltage AC UL 1000 V
Rated voltage AC IEC 950 V
Ampere Rating 1100 A
AC or DC AC
Speed/Characteristic aR
Fuse Size 73
Mounting Bolted
Clearing I2t At Rated Voltage 2430 kA²s
Melting I2t 445 kA²s
AC Max I.R./Breaking Capacity I1: 150 kA
Indication System Yes
Indication System Type Striker
Connection/Terminal Material Silver-Plated Brass
Connection/Terminal Type Flush ends
Product Width 73 mm
Product Length 74 mm
Product Height 78.5 mm
Sell Pack Quantity 1 EA
Sell Pack Weight 1.22 kg
Sell Pack Width 110 mm
Sell Pack Length 125 mm
Sell Pack Height 75 mm
Product group Semiconductor Protection Fuses
Body/Insulating Material Ceramic
Product Weight 1.22 kg
Power Dissipation at Rated Current Value 168 W
HS Code 85361090
Fuse Type Semiconductor
Fuse Class aR
Voltage 950 V

Frequently Asked Questions

What is the Mersen W300514 used for?

The W300514 is a high-speed Protistor® semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power semiconductor devices against short-circuit faults.

What are the electrical ratings of the W300514?

The fuse is rated at 1100 A with a rated voltage of 950 VAC (IEC) and 1000 VAC (UL), using an ultra-fast aR operating characteristic for semiconductor protection.

Does the W300514 include a fuse indicator?

Yes. It incorporates an integrated striker indicator that can be used for local indication or to operate an optional microswitch where required.

Which equipment commonly uses the W300514?

Typical applications include industrial drives, power converters, rectifiers, inverters, UPS systems and other high-power semiconductor equipment.

Can the W300514 be replaced with another fuse?

Only a fuse with identical electrical ratings, body size, mounting style and semiconductor protection characteristics should be used as a replacement.

Trusted Protection from Mersen Protistor®

Mersen Protistor® high-speed semiconductor fuses are trusted worldwide for protecting critical power electronic equipment with fast fault interruption, low let-through energy and high interrupting capacity.

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