High-speed Protistor® fuse with gS characteristic, NH size 3, rated for 690VAC IEC and 700VAC UL, 550A with double visual indicator for status monitoring.
£180.20
The Mersen NH3GS69V550PV is a high-speed NH size 3 semiconductor fuse designed to protect industrial power electronics against overloads and damaging short-circuit currents. Part of the established Mersen Protistor® fuse range, it is engineered for equipment containing sensitive semiconductor devices such as IGBTs, thyristors, diodes and rectifier assemblies.
Featuring a gS operating characteristic, the NH3GS69V550PV provides full-range protection for semiconductor circuits. Its fast current-limiting performance helps reduce peak fault current and let-through energy, protecting valuable components while helping minimise equipment damage, maintenance requirements and unplanned production downtime.
With a rated current of 550 A, a rated voltage of 690 V AC and a robust NH size 3 square-body format, this fuse is suitable for high-power variable frequency drives, converters, rectifiers, inverters and industrial power-control systems. Its blade-contact design enables secure installation in compatible NH fuse bases and fuse-switch disconnectors.
Power semiconductor components can be damaged rapidly by excessive current and fault energy. The Mersen NH3GS69V550PV is designed to interrupt electrical faults quickly while limiting the peak current and thermal energy allowed to pass through the protected circuit.
Unlike partial-range semiconductor fuses, its gS characteristic provides protection against both overload and short-circuit conditions. This makes it suitable for coordinated protection within high-power industrial drives, converters and power distribution assemblies where equipment availability and reliable operation are essential.
| Item number | P322588 |
|---|---|
| Catalogue No | NH3GS69V550PV |
| Description | Square Body High-Speed Fuse Protistor® NH Size 3 gS 690VAC IEC 700VAC UL 550A With Double indicator |
| EAN/UPC Code | 3605340360424 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 550 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | gS |
| Fuse Size | NH3 |
| Mounting | Clip |
| Clearing I2t At Rated Voltage | 559 kA²s |
| Melting I2t | 111.81 kA²s |
| AC Max I.R./Breaking Capacity | I1: 160 kA |
| Indication System | Yes |
| Indication System Type | Double indicator |
| Connection/Terminal Material | Copper |
| 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 | 80 mm |
| Sell Pack Length | 155 mm |
| Sell Pack Height | 75 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.05 kg |
| Power Dissipation at Rated Current Value | 56 W |
| HS Code | 85361090 |
| Country of Manufacture | Tunisia |
It provides high-speed overload and short-circuit protection for semiconductor devices installed in drives, inverters, rectifiers, converters and other industrial power-electronics equipment.
The Mersen NH3GS69V550PV has a rated current of 550 A.
The fuse has a rated operating voltage of 690 V AC.
The gS classification identifies a full-range, high-speed fuse designed to protect semiconductor devices against both overload currents and short-circuit faults.
It is typically installed in a compatible NH fuse base or fuse-switch disconnector within industrial control panels, high-power drive systems and 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...