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MERSEN FUSE 12,5 URD 273 TTF 1250 12,5URD273TTF1250
1250A, 1250VAC high-speed fuse with striker indication and flush end silver-plated brass terminals, designed for semiconductor protection in industrial applications.
£348.55
Why Choose the Mersen K300734 High-Speed Semiconductor Fuse?
The Mersen K300734 is a premium Protistor® square body high-speed semiconductor fuse designed to provide ultra-fast protection for modern power electronic equipment. Engineered for demanding industrial environments, it protects IGBTs, thyristors, diodes, rectifiers, inverters and power conversion systems against damaging short-circuit currents whilst minimising energy let-through and reducing equipment downtime.
Part of the Mersen Protistor® Size 2x73 aR series, the K300734 combines a robust square body design with silver-plated contact surfaces and an integrated striker indicator. Its high interrupting capability and low I²t characteristics make it ideal for industrial drive systems, renewable energy installations, UPS equipment and heavy-duty automation applications.
With a 1250 A current rating, 1250 V AC IEC voltage rating and 100 kA breaking capacity, the K300734 delivers dependable semiconductor protection for high-power industrial applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1250 A current rating for high-power industrial applications.
- 1250 V AC IEC voltage capability.
- 100 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for rapid fuse status indication.
- Silver-plated contact surfaces provide excellent electrical conductivity.
- Designed specifically for protection of modern semiconductor devices.
Key Features
- Mersen Protistor® Size 2x73 aR series.
- 1250 A rated current.
- 1250 V AC IEC rated voltage.
- Ultra-fast aR operating characteristic.
- 100 kA AC breaking capacity.
- Integrated striker indication.
- Flush-end metric threaded terminals.
- Silver-plated contact surfaces.
- Square ceramic body construction.
Reliable Protection for High-Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before excessive thermal energy reaches sensitive semiconductor devices. Their ultra-fast operating characteristics help extend equipment life, improve system reliability and minimise costly production downtime.
The Mersen Protistor® range is trusted worldwide by machine builders, panel manufacturers and industrial engineers for protecting industrial drives, renewable energy converters, UPS systems and heavy-duty power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial power converters.
- IGBT and thyristor protection.
- UPS systems.
- Renewable energy converters.
- Industrial motor control equipment.
- Heavy-duty semiconductor protection circuits.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Size | 2x73 mm | |
| Fuse Class | aR | |
| Voltage | 1250 V | |
| Item number | K300734 | |
| Catalogue No | PC273UD13C13CTF | |
| Description | Square Body High-Speed Fuse Protistor® 2x73 aR 1250VAC IEC 1250A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340332797 | |
| Rated voltage AC IEC | 1250 V | |
| Ampere Rating | 1250 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 2x73 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 2660 kA²s | |
| Melting I2t | 336 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 100 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 167 mm | |
| Product Length | 91 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 1 EA | |
| Sell Pack Weight | 2.53 kg | |
| Sell Pack Width | 90 mm | |
| Sell Pack Length | 205 mm | |
| Sell Pack Height | 95 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 2.53 kg | |
| Power Dissipation at Rated Current Value | 262 W | |
| HS Code | 85351000 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen K300734 used for?
The K300734 provides ultra-fast protection for high-power semiconductor devices including IGBTs, thyristors, diodes and industrial power converters.
What is the current rating of this fuse?
The Mersen K300734 has a 1250 A current rating.
What voltage is the fuse rated for?
It is rated for 1250 V AC IEC operation.
Does the fuse include an indicator?
Yes. The K300734 incorporates an integrated striker indicator for fast identification of fuse operation.
Where is the K300734 typically installed?
It is commonly installed in industrial drives, renewable energy systems, UPS equipment and high-power semiconductor protection applications.
Trusted for High-Power Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to deliver reliable protection for critical power electronic equipment operating in demanding industrial environments.
