High-speed fuse rated at 500A for 690VAC (IEC) and 700VAC (UL) applications with double indicator and plain blades, designed for semiconductor protection.
£163.42
The Mersen NH3UD69V500PV is a high-speed NH size 3 semiconductor fuse designed to protect sensitive power electronic components against damaging short-circuit currents. Part of the established Mersen Protistor® fuse range, it provides rapid fault interruption for industrial equipment containing IGBTs, thyristors, diodes and other semiconductor devices.
This fuse features an aR operating characteristic, providing partial-range protection specifically engineered for semiconductor circuits. Its strong current-limiting performance helps reduce the peak current, thermal energy and electromagnetic stress transmitted during a fault, protecting valuable equipment and helping minimise unplanned downtime.
With a rated current of 500 A, a rated voltage of 690 V AC and a robust NH size 3 format, the NH3UD69V500PV is suitable for high-power variable frequency drives, industrial rectifiers, inverters, converters and power-control systems. Its blade-contact construction enables secure installation in compatible NH fuse bases and fuse-switch disconnectors.
Semiconductor components can suffer irreversible damage from short-circuit energy before conventional industrial fuses have time to operate. The Mersen NH3UD69V500PV is engineered to interrupt fault currents quickly, limiting the peak current and total energy allowed to pass through the protected circuit.
Its high-speed performance makes it particularly suitable for coordinated protection within industrial drives, rectifiers and power converters. Because an aR fuse provides short-circuit rather than full-range overload protection, it should be used with correctly selected overload protection and installed according to the equipment manufacturer's requirements.
| Item number | P320587 |
|---|---|
| Catalogue No | NH3UD69V500PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 3 aR 690VAC IEC 700VAC UL 500A With Double indicator Plain Blades |
| EAN/UPC Code | 3605340358643 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 500 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | NH3 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 119 kA²s |
| Melting I2t | 22.2 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 | 150 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
It is used to provide rapid short-circuit protection for semiconductor devices installed in high-power drives, inverters, rectifiers, converters and other industrial power-electronics equipment.
The Mersen NH3UD69V500PV has a rated current of 500 A.
The fuse has a rated operating voltage of 690 V AC.
The aR classification identifies a partial-range, high-speed fuse designed to protect semiconductor devices against short-circuit currents. Separate overload protection is normally required.
It is typically installed in a compatible NH fuse base or fuse-switch disconnector within industrial control panels, drive systems and high-power conversion equipment.
Mersen Protistor® fuses are widely specified for protecting critical semiconductor equipment where rapid fault interruption, effective current limitation and dependable industrial performance are essential.
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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...