High-speed NH Size 3 fuse with double indicator and plain blades, rated 800A for AC applications up to 690VAC IEC and 700VAC UL. Designed for semiconductor protection with fast fault clearing and global standard approvals.
£186.22
The Mersen NH3UD69V800PV is a premium high-speed semiconductor fuse engineered to provide maximum protection for modern power electronic equipment. As part of the renowned Mersen Protistor® NH series, this ultra-fast aR fuse is specifically designed to protect sensitive semiconductor devices from damaging short-circuit currents while ensuring maximum system reliability and operational continuity.
Manufactured for demanding industrial environments, the NH3UD69V800PV delivers extremely fast fault interruption with low let-through energy, making it ideal for protecting IGBTs, thyristors, diodes, GTOs and rectifier assemblies. Its NH Size 3 construction complies with DIN 43620, allowing straightforward installation in compatible NH fuse bases and fuse switch disconnectors used worldwide.
With a rated current of 800 A, 690 V AC IEC / 700 V AC UL voltage rating and a 170 kA breaking capacity, the Mersen NH3UD69V800PV is an excellent choice for protecting variable frequency drives, industrial inverters, UPS systems, renewable energy equipment and other high-power conversion applications.
High-speed semiconductor fuses are designed to interrupt short-circuit currents before they can damage expensive power electronic components. Their low let-through energy significantly reduces thermal stress, helping to improve equipment reliability and minimise costly downtime.
The Mersen NH3UD69V800PV is widely specified by OEM manufacturers and industrial engineers for high-power drives, converters and renewable energy installations where dependable semiconductor protection is essential.
| Item number | T320591 |
|---|---|
| Catalogue No | NH3UD69V800PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 3 aR 690VAC IEC 700VAC UL 800A With Double indicator Plain Blades |
| EAN/UPC Code | 3605340358728 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 800 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | NH3 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 478 kA²s |
| Melting I2t | 88.9 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 | 220 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
The Mersen NH3UD69V800PV is a high-speed semiconductor fuse designed to protect sensitive power electronic devices such as IGBTs, thyristors and rectifiers against short-circuit faults.
The fuse has a rated current of 800 A.
It is rated for 690 V AC (IEC) and 700 V AC (UL).
The fuse features an aR ultra-fast characteristic developed specifically for semiconductor protection.
It is commonly installed in industrial drives, power converters, UPS systems, renewable energy equipment and other high-power electronic systems.
Mersen Protistor® semiconductor fuses are trusted worldwide by OEM manufacturers, automation engineers and maintenance professionals to provide dependable protection for critical industrial 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...