Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 5 URB 000 D08L 350 5URB000D08L350
High-performance Protistor® fuse for rapid semiconductor protection, rated 350A at 500VAC with integral striker and DIN 80 blade terminals.
£46.82
Why Choose the Mersen B330189 Protistor® High-Speed Fuse?
The Mersen B330189 is a Protistor® Size 000 ultra-fast aR semiconductor fuse designed to provide superior short-circuit protection for sensitive power semiconductor devices. Rated at 350 A and 500 V AC, this fuse is engineered to safeguard diodes, thyristors, IGBTs and other semiconductor components used in industrial power conversion equipment.
Manufactured using precision die-cut silver fuse elements embedded in solidified silica sand within a high-strength ceramic body, the B330189 offers exceptionally low let-through energy, excellent cycling capability and reliable interruption of high fault currents. All contact surfaces are silver plated to ensure optimum electrical performance and corrosion resistance.
Designed for installation in DIN Size 000 fuse bases, the B330189 is widely used in industrial drives, converters, rectifiers, UPS systems and other power electronic equipment where rapid semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection.
- 350 A current rating.
- 500 V AC operating voltage.
- Very low I²t for maximum semiconductor protection.
- Excellent current-limiting performance.
- Silver-plated contacts for long service life.
Key Features
- Mersen Protistor® high-speed fuse.
- Size 000 round-body construction.
- 350 A rated current.
- 500 V AC IEC rating.
- aR operating class.
- DIN 80 blade terminals.
- Ceramic body with silver fuse elements.
- Ultra-fast current-limiting protection.
Designed for Reliable Semiconductor Protection
The B330189 has been engineered specifically for the protection of modern power semiconductor devices. Its ultra-fast operation limits fault energy before expensive components can be damaged, reducing equipment downtime and maintenance costs while extending system reliability.
Its compact Size 000 construction allows easy installation into compatible DIN fuse bases used throughout industrial automation, renewable energy systems and power conversion equipment.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- Power converters.
- Rectifier equipment.
- UPS systems.
- Semiconductor power supplies.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Size | NH000 | |
| Fuse Class | aR | |
| Voltage | 500 V | |
| Item number | B330189 | |
| Catalogue No | DN000UB50V350L | |
| Description | Square Body High-Speed Fuse Protistor® Size NH 000 aR 500VAC IEC 350A With Striker DIN 80 Blades | |
| EAN/UPC Code | 3605340363166 | |
| Rated voltage AC UL | 500 V | |
| Rated voltage DC UL | 320 V | |
| Rated voltage AC IEC | 500 V | |
| Ampere Rating | 350 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC/DC | |
| Speed/Characteristic | aR | |
| Fuse Size | NH000 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 110000 A²s | |
| Melting I2t | 22400 A²s | |
| AC Max I.R./Breaking Capacity | I1: 120 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | DIN 80 Blades | |
| Product Width | 20 mm | |
| Product Length | 100 mm | |
| Product Height | 55.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 0.3849 kg | |
| Sell Pack Width | 110 mm | |
| Sell Pack Length | 130 mm | |
| Sell Pack Height | 80 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.1283 kg | |
| Power Dissipation at Rated Current Value | 58 W | |
| HS Code | 85361090 | |
| Country of Manufacture | Tunisia |
Frequently Asked Questions
What is the Mersen B330189 used for?
The B330189 is an ultra-fast semiconductor fuse designed to protect diodes, thyristors, IGBTs and other power semiconductor devices against short-circuit faults.
What is the current rating?
The fuse has a rated current of 350 A.
What voltage is the fuse rated for?
The B330189 is rated for 500 V AC.
What does the aR fuse class mean?
The aR classification indicates a high-speed fuse intended solely for short-circuit protection of semiconductor devices.
Where is this fuse commonly used?
It is commonly installed in industrial drives, converters, rectifiers, UPS systems and other power electronic equipment requiring rapid semiconductor protection.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted globally by OEMs, panel builders and maintenance engineers for reliable protection of critical power electronic equipment.
