The Protistor® 17×49 gR 690V AC UL 50A fuse-link delivers superior circuit protection for industrial power distribution and control applications, conforming to British Standard dimensions and safety requirements.
£37.95
The Mersen P075890 is a high-performance Protistor® semiconductor fuse-link designed to provide rapid and dependable protection for sensitive power electronic equipment. Manufactured in a compact British Standard format, it combines extremely high breaking capacity with effective current limitation for demanding industrial power conversion and control applications.
Featuring a gR full-range operating class, the P075890 protects power semiconductors against both overload and short-circuit currents. Its fast operating characteristics help restrict peak fault current and let-through energy, reducing electrical, thermal and mechanical stress on components such as diodes, thyristors, IGBTs and rectifier assemblies.
With a rated current of 50 A and an IEC rated voltage of 690 V AC, the Mersen P075890 is suitable for variable frequency drives, industrial rectifiers, inverters, UPS equipment and power converters. Its compact 17 × 49 mm BS88-4 fuse-link format supports straightforward installation in compatible fuse holders and semiconductor protection assemblies.
The Mersen P075890 is engineered to interrupt dangerous currents before excessive energy can damage sensitive semiconductor devices. Its rapid operation and current-limiting performance help reduce fault energy within power conversion equipment, improving system reliability and limiting the risk of costly component failure.
Unlike partial-range aR fuse-links, the P075890 has a gR characteristic that clears both overload and short-circuit currents. This provides comprehensive semiconductor protection and can simplify coordination within correctly designed industrial electrical systems.
| Item number | P075890 |
|---|---|
| Catalogue No | BS17US69V50 |
| Description | British Standard fuse-link Protistor® 17x49 gR 690V AC UL 50A |
| EAN/UPC Code | 3605340012583 |
| Rated voltage AC UL | 700 V |
| Rated voltage DC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 50 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 17x49 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 1420 A²s |
| Melting I2t | 156 A²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Connection/Terminal Material | Copper |
| Connection/Terminal Type | L Brackets |
| Product Diameter | 18.5 mm |
| Product Length | 77.2 mm |
| Sell Pack Quantity | 10 EA |
| Sell Pack Weight | 0.39 kg |
| Sell Pack Width | 100 mm |
| Sell Pack Length | 195 mm |
| Sell Pack Height | 25 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.039 kg |
| Power Dissipation at Rated Current Value | 12.6 W |
| HS Code | 85361050 |
| Country of Manufacture | India |
The Mersen P075890 provides high-speed overload and short-circuit protection for power semiconductors used in drives, rectifiers, converters, inverters and other industrial electronic equipment.
The fuse has a nominal current rating of 50 A.
The P075890 is rated at 690 V AC under IEC standards and at 700 V AC or DC under UL ratings.
The gR classification indicates full-range semiconductor protection, allowing the fuse to clear both overload and short-circuit currents.
No. The P075890 is a non-indicating fuse-link and does not incorporate an integrated striker. A striker-equipped 50 A version should be selected where remote or visual operation indication is required.
Mersen Protistor® high-speed fuses are widely specified by OEMs, panel builders and industrial engineers for reliable protection of critical semiconductor and power conversion equipment.
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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...