High-speed fuse engineered for superior circuit protection in demanding industrial environments, supporting 500VAC and 400A with integrated striker L brackets.
£78.34
The Mersen H330195 is a premium Protistor® square body high speed semiconductor fuse engineered to provide rapid protection for sensitive power electronic equipment. Designed specifically for modern power conversion systems, it delivers ultra-fast fault interruption to protect semiconductors including IGBTs, thyristors, diodes and rectifiers from damaging short-circuit currents.
Manufactured as part of the trusted Mersen Protistor® NH 000 series, the H330195 features an ultra-fast aR operating characteristic, silver-plated contact surfaces and an integrated striker indicator with L bracket mounting. Its robust square body construction uses precision die-cut fuse elements embedded in solidified sand to provide excellent current limiting performance, low let-through energy and dependable protection in demanding industrial environments.
With a 400 A current rating and a 500 V AC IEC / UL voltage rating, the Mersen H330195 is ideally suited for industrial drives, UPS systems, inverters, rectifiers and power converters where reliable semiconductor protection is critical.
High speed semiconductor fuses are designed to interrupt fault currents before expensive electronic components can be damaged. Their ultra-fast operation minimises thermal and electrical stress, improving equipment reliability while reducing maintenance costs and production downtime.
The Protistor® range has been developed specifically for semiconductor protection, providing high interrupting capacity, excellent current limitation and dependable performance across demanding industrial power conversion applications.
| Item number | H330195 |
|---|---|
| Catalogue No | BS000UB50V400P |
| Description | Square Body High-Speed Fuse Protistor® Size NH 000 aR 500VAC IEC 400A With Striker L Brackets |
| EAN/UPC Code | 3605340363289 |
| Rated voltage AC UL | 500 V |
| Rated voltage DC UL | 320 V |
| Rated voltage AC IEC | 500 V |
| Ampere Rating | 400 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Speed/Characteristic | aR |
| Fuse Size | NH000 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 160000 A²s |
| Melting I2t | 33180 A²s |
| AC Max I.R./Breaking Capacity | I1: 120 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Tin-Plated Copper |
| Connection/Terminal Type | L Brackets |
| Product Width | 32 mm |
| Product Length | 94 mm |
| Product Height | 27 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 0.4668 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 | 0.1556 kg |
| Power Dissipation at Rated Current Value | 66 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The H330195 provides ultra-fast protection for semiconductor devices such as IGBTs, thyristors, diodes and rectifiers used in industrial power electronic equipment.
The fuse has a 400 A current rating.
The H330195 is rated for 500 V AC (IEC/UL) and 320 V DC (UL) applications.
The aR operating class provides ultra-fast protection specifically for semiconductor devices while allowing normal equipment operating conditions.
It is widely used in industrial drives, UPS systems, inverters, rectifiers, power converters and other semiconductor-based power equipment.
Mersen Protistor® semiconductor fuses are trusted by OEM manufacturers and industrial engineers worldwide for delivering rapid fault protection, excellent current limitation and dependable protection of modern power electronic systems.
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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...