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MERSEN FUSE 6,9 URD 33 TT F 0900 6,9URD33TTF0900
High-speed aR fuse designed for semiconductor protection with 900A rating at 690VAC IEC and 700VAC UL, featuring flush ends with metric threads and built-in striker indication system.
£138.28
Why Choose the Mersen A300081 Protistor® High-Speed Fuse?
The Mersen A300081 (PC33UD69V900TF) is a premium Protistor® square body high-speed semiconductor fuse engineered to provide ultra-fast short-circuit protection for sensitive power electronic equipment. Featuring an aR operating characteristic, this fuse is specifically designed to protect IGBTs, thyristors, SCRs and diodes used in demanding industrial power conversion systems.
Part of the renowned Mersen Protistor® Size 33 series, the A300081 combines high interrupting capacity, low let-through energy and rugged construction to help minimise equipment damage and reduce costly downtime. Silver-plated contact surfaces, solidified sand technology and an integrated striker indicator ensure reliable operation in demanding industrial environments.
With a 900 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the A300081 is ideally suited for variable speed drives, UPS systems, industrial converters, renewable energy equipment and high-power automation installations requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 900 A rated current for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- 200 kA breaking capacity provides outstanding fault interruption.
- Integrated striker indicator for convenient maintenance.
- Silver-plated contacts for excellent electrical performance.
Key Features
- Mersen Protistor® Size 33 semiconductor fuse.
- Catalogue number: PC33UD69V900TF.
- Item number: A300081.
- 900 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR operating characteristic.
- Flush-end metric threaded terminals.
- Integrated striker indicator.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy reaches expensive semiconductor devices. Their ultra-fast operation helps improve equipment reliability, reduce maintenance costs and maximise system availability.
The Mersen Protistor® Size 33 range is trusted by OEMs and industrial engineers worldwide for protecting power converters, motor drives, UPS systems and renewable energy equipment operating in demanding environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | A300081 | |
| Catalogue No | PC33UD69V900TF | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 900A With Striker Flush ends metric threads | |
| EAN/UPC Code | 3605340323214 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 900 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 770 kA²s | |
| Melting I2t | 130 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Design Details | Standard Terminal | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 73 mm | |
| Product Length | 50.6 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.4168 kg | |
| Sell Pack Width | 85 mm | |
| Sell Pack Length | 245 mm | |
| Sell Pack Height | 95 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.8056 kg | |
| Power Dissipation at Rated Current Value | 120 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen A300081 used for?
The A300081 provides ultra-fast short-circuit protection for semiconductor devices such as IGBTs, SCRs, thyristors and diodes used in industrial power electronic systems.
What is the current rating of the A300081?
The fuse has a 900 A current rating.
What voltage is this fuse designed for?
The A300081 is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the aR characteristic mean?
An aR fuse provides ultra-fast short-circuit protection specifically for semiconductor devices and should be used together with suitable overload protection.
Where is the A300081 commonly installed?
It is commonly installed in industrial drives, UPS systems, power converters, renewable energy equipment and other semiconductor-based electrical installations.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for protecting critical power electronic equipment, delivering dependable performance and helping minimise costly downtime.
