British Standard fuse-link Protistor® 17×27 aR 250V AC UL 50A With Striker providing reliable short-circuit protection for semiconductor applications with integrated striker indication.
£56.66
The Mersen J097551 is a Protistor® BS88-4 high speed semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power electronic equipment. Designed specifically for semiconductor applications, it protects devices such as IGBTs, thyristors, diodes and rectifiers by limiting fault current and reducing damaging let-through energy.
Manufactured in a compact 17 × 27 mm British Standard fuse-link, the J097551 features an integrated striker indicator for remote fuse operation signalling. It is part of the trusted Mersen Protistor® range, offering extremely high breaking capacity and excellent current-limiting performance for demanding industrial applications.
With a 50 A current rating and a 250 V AC / 250 V DC rating, the Mersen J097551 is ideally suited for industrial drives, power supplies, UPS systems, converters and other semiconductor-based equipment requiring dependable circuit protection.
Power semiconductor devices can fail within milliseconds during fault conditions. High speed semiconductor fuses are designed to interrupt excessive fault currents before expensive components are damaged, helping reduce repair costs and minimise equipment downtime.
The Mersen Protistor® range combines low let-through energy, high interrupting capacity and excellent current-limiting performance, making it a trusted choice for protecting industrial power electronic equipment.
| Item number | J097551 |
|---|---|
| Catalogue No | BS17US25V50P |
| Description | British Standard fuse-link Protistor® 17x27 aR 250V AC UL 50A With Striker |
| EAN/UPC Code | 3605340146936 |
| Rated voltage AC UL | 250 V |
| Rated voltage DC UL | 250 V |
| Rated voltage AC IEC | 250 V |
| Ampere Rating | 50 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 17x27 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 940 A²s |
| Melting I2t | 180 A²s |
| AC Max I.R./Breaking Capacity | I1: 250 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Copper |
| Connection/Terminal Type | L Brackets |
| Product Diameter | 18.5 mm |
| Product Width | 27 mm |
| Product Length | 54.4 mm |
| Product Height | 24 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 0.1299 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 130 mm |
| Sell Pack Height | 40 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.0433 kg |
| Power Dissipation at Rated Current Value | 8.8 W |
| HS Code | 85361050 |
| Country of Manufacture | India |
The Mersen J097551 is a high speed semiconductor fuse designed to protect IGBTs, thyristors, diodes and rectifiers against short-circuit faults.
The Mersen J097551 has a 50 A current rating.
The fuse is rated at 250 V AC (IEC/UL) and 250 V DC (UL).
Yes. The fuse incorporates an integrated striker to provide remote indication when the fuse has operated.
It is commonly used in industrial drives, power supplies, converters, UPS systems and other semiconductor-based power electronic equipment.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers for delivering rapid fault interruption, exceptional current limitation and reliable protection of 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...