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MERSEN FUSE A 070 URD 32 KI 0350 A070UD32KI350
High-speed Protistor® fuse with striker indication, 350A rating, suitable for semiconductor protection in industrial applications.
£87.28
Why Choose the Mersen Q302165 Protistor® High-Speed Fuse?
The Mersen Q302165 (A070UD32KI350) is a premium square body semiconductor protection fuse engineered to provide ultra-fast protection for modern power electronic equipment. Part of the renowned Mersen Protistor® Size 32 series, this aR fuse is specifically designed to protect diodes, thyristors, IGBT modules and other semiconductor devices from damaging short-circuit currents.
Designed for demanding industrial applications, the Q302165 combines exceptional current-limiting performance with low let-through energy to minimise damage during electrical faults. Its ceramic square body, silver-plated contacts, slotted blade terminals and integrated striker indicator provide dependable operation and simplified maintenance.
With a 350 A current rating, 690 V AC IEC and 700 V AC UL voltage ratings, the Mersen Q302165 is ideally suited for variable speed drives, industrial inverters, rectifiers, UPS systems and other high-power conversion equipment requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 350 A current rating for industrial power electronics.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Designed for protection of IGBTs, thyristors and power semiconductor devices.
- Low I²t characteristics help minimise equipment damage during faults.
- Integrated striker indicator for convenient fuse monitoring.
Key Features
- Mersen Protistor® Size 32 series.
- Catalogue number: A070UD32KI350.
- 350 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- Ultra-fast aR operating characteristic.
- Square body ceramic construction.
- Short slotted blade terminals.
- Integrated striker indicator with optional microswitch compatibility.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive semiconductor components can be damaged. Their exceptionally fast operating speed and low let-through energy help maximise equipment reliability while reducing maintenance costs and production downtime.
The Protistor® range from Mersen is trusted globally in industrial automation, renewable energy, motor drives, UPS installations and power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor control equipment.
- Power converters and inverters.
- Industrial rectifiers.
- UPS and backup power systems.
- Protection of IGBTs, thyristors and semiconductor devices.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | Q302165 | |
| Catalogue No | A070UD32KI350 | |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 350A With Striker Slotted Blades short | |
| EAN/UPC Code | 3605340351224 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 350 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 32 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 53.7 kA²s | |
| Melting I2t | 8.9 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 59 mm | |
| Product Length | 134 mm | |
| Product Height | 65 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.6569 kg | |
| Sell Pack Width | 160 mm | |
| Sell Pack Length | 195 mm | |
| Sell Pack Height | 72 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.5523 kg | |
| Power Dissipation at Rated Current Value | 74 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen Q302165 used for?
The Mersen Q302165 is designed to protect high-value semiconductor devices such as IGBTs, thyristors and diodes from damaging short-circuit currents.
What is the current rating of the Q302165?
The fuse has a 350 A rated current.
What voltage is the Q302165 rated for?
It is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the aR fuse classification mean?
The aR operating characteristic provides ultra-fast short-circuit protection specifically for semiconductor devices while allowing normal operating currents.
Where is the Q302165 typically installed?
It is commonly installed in industrial drives, converters, rectifiers, UPS systems and other high-power semiconductor equipment.
Trusted Protection for Critical Power Electronics
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide dependable protection for mission-critical power electronic equipment operating in demanding environments.
