High-speed aR characteristic fuse with ceramic square body, double visual indicators, and plain blade terminals for reliable protection of power semiconductor devices up to 630A at 690VAC IEC and 700VAC UL.
£174.92
The Mersen NH3UD69V630PV is a premium Protistor® NH Size 3 high-speed semiconductor fuse engineered to deliver rapid and dependable protection for sensitive power semiconductor devices. Designed by Mersen, this fuse safeguards IGBTs, thyristors, diodes and other power electronic components against damaging short-circuit currents in demanding industrial environments.
As part of the trusted Mersen Protistor® NH aR series, the NH3UD69V630PV combines ultra-fast fault interruption with high breaking capacity to maximise equipment protection while minimising downtime. Constructed with pure silver fuse elements embedded in solidified sand and finished with silver-plated contacts, it offers low I²t performance and exceptional electrical reliability.
With a rated current of 630 A and a 690 V AC IEC / 700 V AC UL voltage rating, the NH3UD69V630PV is ideally suited to variable frequency drives, power converters, UPS systems, renewable energy installations and industrial motor control applications.
High-speed semiconductor fuses are specifically designed to clear short-circuit faults before sensitive semiconductor devices can be damaged. Their low energy let-through characteristics reduce thermal stress and help extend the service life of costly power electronic equipment.
The Mersen Protistor® NH range is trusted worldwide by OEMs and industrial engineers for protecting variable speed drives, converters, rectifiers, UPS systems and renewable energy equipment where reliable semiconductor protection is essential.
| Item number | R320589 |
|---|---|
| Catalogue No | NH3UD69V630PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 3 aR 690VAC IEC 700VAC UL 630A With Double indicator Plain Blades |
| EAN/UPC Code | 3605340358681 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 630 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | NH3 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 226 kA²s |
| Melting I2t | 42.1 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 | 175 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
It provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, thyristors and power diodes used in industrial power electronic equipment.
The fuse has a 630 A rated current.
The NH3UD69V630PV is rated for 690 V AC (IEC) and 700 V AC (UL).
Yes. The fuse is supplied with a double visual indicator to simplify maintenance and fuse identification.
It is commonly installed in high-power drives, converters, UPS systems, renewable energy equipment and industrial automation panels.
Mersen Protistor® high-speed semiconductor fuses are trusted globally for protecting valuable power electronic equipment while helping maximise system reliability and minimise costly downtime.
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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...