The NH1UD69V400PV offers robust circuit protection for critical industrial applications, delivering rapid response to overloads and short circuits. Rated for up to 690VAC IEC and 700VAC UL at 400A, it ensures reliable safeguarding of power semiconductors in high-stress environments.
£122.48
The Mersen NH1UD69V400PV is a premium Protistor® NH Size 1 high-speed semiconductor fuse engineered to provide rapid and dependable protection for modern power semiconductor devices. Manufactured by Mersen, this fuse is specifically designed to protect IGBTs, thyristors, GTOs and power diodes used in industrial power conversion systems.
As part of the trusted Mersen Protistor® NH aR series, the NH1UD69V400PV combines ultra-fast fault interruption with low energy let-through to help minimise damage during short-circuit events. Manufactured using pure silver fuse elements embedded in solidified sand with silver-plated contact surfaces, it delivers exceptional reliability and long service life in demanding industrial environments.
With a rated current of 400 A and a 690 V AC IEC / 700 V AC UL voltage rating, the NH1UD69V400PV is ideal for protecting variable frequency drives, UPS systems, inverters, converters and renewable energy equipment requiring dependable semiconductor protection.
High-speed semiconductor fuses are specifically engineered to interrupt short-circuit currents before excessive thermal energy can damage sensitive semiconductor components. Their low I²t characteristics help extend equipment life, improve reliability and reduce unplanned downtime.
The Mersen Protistor® NH range is widely specified by OEMs and industrial engineers for protecting motor drives, converters, UPS systems, renewable energy equipment and other industrial power conversion applications.
| Item number | S320383 |
|---|---|
| Catalogue No | NH1UD69V400PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 1 aR 690VAC IEC 700VAC UL 400A With Double indicator Plain Blades |
| EAN/UPC Code | 3605340358476 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 400 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | NH1 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 105000 A²s |
| Melting I2t | 19500 A²s |
| 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 | 40 mm |
| Product Length | 135 mm |
| Product Height | 64 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.26 kg |
| Sell Pack Width | 125 mm |
| Sell Pack Length | 140 mm |
| Sell Pack Height | 70 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.42 kg |
| Power Dissipation at Rated Current Value | 97 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors, GTOs and power diodes used in industrial power electronic equipment.
The fuse has a 400 A rated current.
The NH1UD69V400PV is rated for 690 V AC (IEC) and 700 V AC (UL).
Yes. It features a double visual indicator for quick fuse status identification and simplified maintenance.
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based power conversion systems.
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault protection, low energy let-through and dependable performance in demanding industrial power electronic applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...