High-speed fuse providing reliable short-circuit protection for semiconductor devices up to 1250VAC and 800A, featuring a robust square body, integral striker indication, and metric threaded flush ends for bolted mounting.
£523.21
The Mersen F300730 is a specialist high-speed semiconductor protection fuse intended for use in demanding industrial power electronic equipment. It is designed to interrupt severe short-circuit currents rapidly, helping protect sensitive components such as IGBTs, thyristors, diodes, rectifiers and semiconductor modules.
High-speed fuses provide significantly lower let-through energy than conventional general-purpose fuse links. By limiting the electrical and thermal energy that reaches protected semiconductor devices during a fault, the F300730 can help reduce equipment damage, improve operational reliability and minimise unplanned production downtime.
The Mersen F300730 may be suitable for industrial drives, power converters, inverters, uninterruptible power supplies and other power electronic systems. Its precise current rating, voltage rating, fuse class, breaking capacity, terminal arrangement and dimensions should be verified from the fuse label, Mersen documentation or the original equipment specification before installation.
Power semiconductor components can be permanently damaged within milliseconds when exposed to excessive fault current. The Mersen F300730 is intended to provide the rapid fault clearance and energy limitation required to protect these sensitive devices more effectively than a conventional general-purpose fuse.
Correct fuse coordination remains essential. Before fitting the F300730, engineers should verify its rated current, rated voltage, breaking capacity, utilisation category, pre-arcing and total-clearing I²t values, terminal configuration and physical dimensions against the requirements of the equipment manufacturer.
| Item number | F300730 |
|---|---|
| Catalogue No | PC273UD13C800TF |
| Description | Square Body High-Speed Fuse Protistor® 2x73 aR 1250VAC IEC 800A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340332759 |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 800 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 2x73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 815 kA²s |
| Melting I2t | 100 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 | 195 W |
| HS Code | 85351000 |
| Country of Manufacture | France |
The Mersen F300730 is intended to protect sensitive semiconductor devices and industrial power electronic equipment against damaging short-circuit currents.
It may be used in equipment containing IGBTs, thyristors, power diodes, rectifiers and other semiconductor modules.
No. It is a specialist high-speed fuse intended primarily for semiconductor and power electronic protection rather than general cable overload protection.
High-speed fuses of this type are commonly installed in variable frequency drives, converters, inverters, UPS systems, soft starters and other industrial power electronic equipment.
Confirm the current and voltage ratings, breaking capacity, fuse characteristic, I²t performance, terminal arrangement and physical dimensions against the original equipment requirements and the markings on the fuse.
Mersen high-speed fuses are used by electrical engineers, machine builders and maintenance professionals to protect valuable semiconductor equipment and support dependable operation in demanding industrial power systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...