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MERSEN FUSE 10 URD 73 D11 A 0900 10URD73D11A0900
High-speed fuse with 900A rating, 1000VAC IEC and 1100VAC UL rated voltage, featuring a striker indication system and DIN 110 blade terminals for industrial semiconductor protection.
£187.27
Why Choose the Mersen K300573 High-Speed Semiconductor Fuse?
The Mersen K300573 is a high-performance Protistor® square body semiconductor protection fuse engineered to provide ultra-fast protection for sensitive power electronic components. Designed for demanding industrial applications, this high-speed fuse safeguards IGBTs, thyristors, diodes, inverters and power conversion equipment against damaging short circuits while minimising energy let-through.
Part of the trusted Mersen Protistor® Size 73 aR series, the K300573 delivers exceptional reliability in industrial automation, renewable energy systems, motor drives and power conversion equipment. Its square body construction, silver-plated contacts and integrated striker indicator provide dependable performance whilst simplifying maintenance and fault detection.
With a 900 A current rating, 1000 V AC IEC / 1100 V AC UL voltage rating and 167 kA breaking capacity, the K300573 is designed for high-power semiconductor protection where fast fault clearance and dependable operation are essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 900 A current rating for demanding industrial applications.
- 1000 V AC IEC / 1100 V AC UL voltage capability.
- High 167 kA breaking capacity for enhanced equipment protection.
- Integrated striker indicator enables rapid fuse status identification.
- Silver-plated DIN 110 blade terminals ensure reliable electrical connections.
- Robust ceramic square body construction for long service life.
Key Features
- Mersen Protistor® Size 73 aR series.
- 900 A rated current.
- 1000 V AC IEC / 1100 V AC UL rated voltage.
- Ultra-fast aR operating characteristic.
- 167 kA AC breaking capacity.
- Integrated striker indication system.
- DIN 110 silver-plated blade terminals.
- Bolted mounting configuration.
- Ceramic insulated square body construction.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically designed to protect expensive power electronic devices from catastrophic damage caused by short circuits. Their ultra-fast operation limits fault energy before it reaches sensitive semiconductor components, helping minimise downtime and costly equipment repairs.
The Mersen Protistor® range is trusted throughout industry for protecting variable frequency drives, UPS systems, renewable energy converters, industrial power supplies and other high-power electronic installations where rapid fault interruption is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters and converters.
- Protection of IGBT and thyristor modules.
- UPS and power supply equipment.
- Renewable energy power conversion systems.
- Industrial automation and motor control panels.
- High-power semiconductor protection circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 1000 V | |
| Item number | K300573 | |
| Catalogue No | PC73UD10C900D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1000VAC IEC 1100VAC UL 900A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340330502 | |
| Rated voltage AC UL | 1100 V | |
| Rated voltage AC IEC | 1000 V | |
| Ampere Rating | 900 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 1440 kA²s | |
| Melting I2t | 250 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 167 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | DIN 110 Blades | |
| Product Width | 73 mm | |
| Product Length | 133.4 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 3.36 kg | |
| Sell Pack Width | 150 mm | |
| Sell Pack Length | 250 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 1.12 kg | |
| Power Dissipation at Rated Current Value | 170 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen K300573 used for?
The K300573 is designed to provide ultra-fast protection for semiconductors including IGBTs, thyristors, diodes and other sensitive power electronic devices.
What is the current rating of this fuse?
The Mersen K300573 has a 900 A current rating.
What voltage is the fuse rated for?
It is rated for 1000 V AC (IEC) and 1100 V AC (UL).
Does the fuse include an indicator?
Yes. The fuse incorporates an integrated striker indication system for quick identification of fuse operation.
Where is the K300573 commonly installed?
It is commonly installed in industrial drives, power converters, renewable energy systems, UPS equipment and other semiconductor protection applications.
Trusted for Critical Power Protection
Mersen Protistor® semiconductor fuses are relied upon worldwide by engineers and OEMs to deliver fast, dependable protection for high-value power electronic equipment operating in demanding industrial environments.
