The Protistor® 17×49 gR fuse-link delivers fast, reliable protection for high-voltage electrical circuits up to 690VAC. Rated at 90A with a breaking capacity of 200 kA, it meets BS88 and IEC standards.
£40.68
The Mersen K220970 (BS17GB69V90) is a Protistor® British Standard high-speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. It features a 90 A current rating, 690 VAC IEC voltage rating and 17 × 49 mm fuse size, making it suitable for demanding industrial semiconductor protection applications.
Manufactured by Mersen, this gR class semiconductor fuse is engineered to protect power semiconductors against both overload and short-circuit faults. Its high breaking capacity and low let-through energy help minimise damage to expensive semiconductor devices while improving system reliability.
The K220970 complies with IEC 60269-1 and IEC 60269-4 requirements for semiconductor protection and is suitable for use in variable speed drives, UPS systems, inverters, rectifiers and other industrial power conversion equipment.
| Item number | K220970 |
|---|---|
| Catalogue No | BS17GB69V90 |
| Description | British Standard fuse-link Protistor® 17x49 gR 690VAC IEC 90A |
| EAN/UPC Code | 3605340248685 |
| Rated voltage AC UL | 700 V |
| Rated voltage DC UL | 600 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 90 A |
| AC or DC | AC |
| Fuse Size | 17x49 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 5300 A²s |
| Melting I2t | 840 A²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Design Details | gRB |
| 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 | 20 W |
| HS Code | 85361090 |
| Country of Manufacture | India |
The Mersen K220970 is a Protistor® high-speed semiconductor fuse designed to protect power semiconductor devices in industrial power electronic equipment.
The K220970 has a rated current of 90 A.
The fuse is rated at 690 VAC IEC, 700 VAC UL and 600 VDC UL.
This is a gR class high-speed semiconductor fuse providing full-range semiconductor protection.
Typical applications include variable speed drives, UPS systems, inverters, rectifiers, converters and other equipment containing sensitive semiconductor devices.
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering exceptionally fast fault clearing, high breaking capacity and reliable protection for modern power electronic 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...