High-speed aR characteristic fuse designed for semiconductor protection at 1400A and 1100VAC with integrated striker indication and bolted mounting.
£576.19
The Mersen K302229 is a Protistor® Size 2×73 square body high-speed semiconductor fuse designed to provide exceptional protection for modern power electronic equipment. Engineered specifically for IGBTs, thyristors, diodes, rectifiers, inverters and power conversion systems, it rapidly interrupts fault currents to minimise energy let-through and protect valuable semiconductor devices from catastrophic damage.
Manufactured as catalogue number PC273UD11C14CTF, the K302229 is rated at 1400 A with a 1100 V AC IEC voltage rating. It features a robust 2×73 square body construction, flush-end metric threaded terminals and an integrated striker indicator, making it ideal for demanding industrial power conversion, motor drives, renewable energy systems and UPS installations.
Part of the trusted Mersen Protistor® semiconductor fuse family, the K302229 is manufactured with silver-plated contacts and die-cut fuse elements embedded in high-grade silica sand to deliver low I²t values and a high interrupting capacity for dependable long-term performance.
Protistor® semiconductor fuses are engineered to interrupt high fault currents before excessive thermal energy reaches sensitive semiconductor devices. Their ultra-fast operating characteristics help improve equipment reliability, minimise maintenance costs and reduce production downtime in demanding industrial environments.
The K302229 is widely specified for industrial motor drives, renewable energy converters, UPS systems, heavy-duty power supplies and high-power electronic installations where dependable semiconductor protection is essential.
| Item number | K302229 |
|---|---|
| Catalogue No | PC273UD11C14CTF |
| Description | Square Body High-Speed Fuse Protistor® 2x73 aR 1100VAC IEC 1400A With Striker Flush ends metric threads |
| EAN/UPC Code | 3605340351866 |
| Rated voltage AC IEC | 1100 V |
| Ampere Rating | 1400 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 2x73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 3060 kA²s |
| Melting I2t | 454 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 | 283 W |
| HS Code | 85351000 |
| Country of Manufacture | France |
The K302229 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors, diodes and industrial power converters.
The fuse has a 1400 A rated current.
It is rated for 1100 V AC IEC operation.
Yes. It incorporates an integrated striker indicator to provide rapid identification after fuse operation.
The K302229 is supplied with flush-end metric threaded terminals for secure industrial installation.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide dependable protection for high-value power electronic equipment operating in demanding industrial environments.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...