The Protistor® NH3UD69V450PV offers rapid, reliable short-circuit protection for high-power industrial applications, ensuring critical components are safeguarded in demanding environments. Designed for operation at up to 690VAC (IEC) / 700VAC (UL) and rated at 450A, it delivers consistent high-speed performance and minimal let-through energy.
£159.61
The Mersen NH3UD69V450PV is a premium NH Size 3 square body high-speed semiconductor protection fuse from the industry-leading Mersen Protistor® series. Specifically engineered to protect sensitive power electronic equipment, this ultra-fast aR fuse safeguards IGBTs, thyristors, GTOs, diodes and other semiconductor devices against damaging short-circuit currents while delivering exceptional current-limiting performance.
Manufactured with pure silver fuse elements embedded in solidified silica sand, the NH3UD69V450PV offers extremely low let-through energy (I²t), high interrupting capacity and silver-plated contact surfaces for dependable long-term operation. The double visual indicator simplifies maintenance and enables rapid identification of an operated fuse.
With a 450 A rated current and 690 V AC IEC / 700 V AC UL operating voltage, this NH Size 3 fuse is ideally suited for industrial drives, power converters, UPS systems, renewable energy installations and other demanding power conversion applications requiring rapid semiconductor protection.
The Mersen NH3UD69V450PV is engineered to interrupt fault currents rapidly before they can damage expensive semiconductor devices. Its low energy let-through characteristics help improve equipment reliability, reduce maintenance costs and minimise costly production downtime.
Designed for today's power conversion equipment, the Protistor® NH series provides dependable protection in industrial automation, renewable energy installations, motor drives and high-power electrical systems.
| Item number | M320585 |
|---|---|
| Catalogue No | NH3UD69V450PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 3 aR 690VAC IEC 700VAC UL 450A With Double indicator Plain Blades |
| EAN/UPC Code | 3605340358612 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 450 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | NH3 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 84.3 kA²s |
| Melting I2t | 15.7 kA²s |
| AC Max I.R./Breaking Capacity | I1: 170 kA |
| Indication System | Yes |
| Indication System Type | Double indicator |
| Connection/Terminal Material | Brass |
| Connection/Terminal Type | Plain Blades |
| Product Width | 72 mm |
| Product Length | 150 mm |
| Product Height | 89 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.05 kg |
| Sell Pack Width | 165 mm |
| Sell Pack Length | 185 mm |
| Sell Pack Height | 100 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.05 kg |
| Power Dissipation at Rated Current Value | 139 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors, GTOs and diodes used in industrial power electronic equipment.
The Mersen NH3UD69V450PV has a 450 A rated current.
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
The aR classification identifies an ultra-fast fuse designed specifically for semiconductor short-circuit protection.
It is commonly installed in industrial drives, converters, UPS systems, inverter equipment and power conversion applications requiring dependable semiconductor protection.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers for delivering rapid fault interruption and dependable protection for critical power electronic equipment.
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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...