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MERSEN FUSE A070 URD 33 TTI 1400 A070URD33TTI1400
High-speed fuse designed for reliable interruption of high fault currents up to 1400A at 690VAC (IEC) and 700VAC (UL) with robust square body design, striker indication system, and bolted mounting with UNC threads.
£274.66
Why Choose the Mersen F300454 Protistor® High-Speed Fuse?
The Mersen F300454 (catalogue number A070UD33TTI1400) is a premium Protistor® square body semiconductor protection fuse designed to provide ultra-fast protection for high-power semiconductor devices. Engineered specifically for safeguarding IGBTs, thyristors, diodes and other power electronic components, it delivers exceptional performance in demanding industrial power conversion applications.
As part of the renowned Mersen Protistor® Size 33 aR series, this high-speed fuse offers low let-through energy (I²t), high interrupting capacity and dependable short-circuit protection. Its reinforced threaded terminals, silver-plated contacts and integrated striker indicator simplify installation while ensuring reliable operation in critical electrical systems.
Rated at 1400 A with a 690 V AC IEC / 700 V AC UL voltage rating, the F300454 is ideally suited for protecting large variable speed drives, power converters, UPS systems, renewable energy equipment and heavy-duty industrial automation installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for sensitive power electronics.
- 1400 A current rating for high-power industrial applications.
- 690 V AC IEC / 700 V AC UL operating voltage.
- 200 kA breaking capacity for outstanding fault interruption.
- Integrated striker indicator for remote indication and easier maintenance.
- Silver-plated contact surfaces provide excellent conductivity.
- Designed to protect IGBTs, SCRs, diodes and other semiconductor devices from short-circuit damage.
Key Features
- Mersen Protistor® Size 33 aR series.
- 1400 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- Ultra-fast acting aR characteristic.
- Square body fuse with reinforced threaded terminals.
- Integrated striker for fuse indication and microswitch compatibility.
- Low I²t design for superior semiconductor protection.
- Suitable for demanding industrial power conversion systems.
Advanced Protection for High-Power Electronics
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before costly semiconductor devices can be damaged. The Mersen Protistor® series combines exceptionally low let-through energy with rapid fault interruption to maximise equipment reliability and minimise downtime.
The F300454 is widely used throughout industrial automation, renewable energy, motor control and heavy power conversion systems where dependable semiconductor protection is essential for maintaining operational continuity.
Typical Applications
- Variable frequency drives (VFDs).
- High-power motor drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Soft starters.
- Industrial automation equipment.
- Protection of IGBTs, SCRs and semiconductor modules.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | F300454 | |
| Catalogue No | A070UD33TTI1400 | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1400A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340328677 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 1400 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 2700 kA²s | |
| Melting I2t | 465 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Design Details | Reinforced 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 | 2.682 kg | |
| Sell Pack Width | 86 mm | |
| Sell Pack Length | 247 mm | |
| Sell Pack Height | 94 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.894 kg | |
| Power Dissipation at Rated Current Value | 160 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen F300454 used for?
The F300454 is a high-speed semiconductor protection fuse designed to protect power electronic components such as IGBTs, thyristors and diodes against short-circuit faults.
What is the current rating of the F300454?
This fuse has a 1400 A rated current.
What voltage is the fuse designed for?
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the aR characteristic indicate?
The aR designation identifies an ultra-fast semiconductor protection fuse intended to protect sensitive power electronic devices against short-circuit currents.
Which equipment commonly uses this fuse?
The F300454 is commonly installed in large variable speed drives, power converters, UPS systems, renewable energy equipment and heavy industrial automation systems.
Trusted Protection for Industrial Power Systems
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, electrical engineers and industrial manufacturers for delivering dependable protection of high-value semiconductor equipment in demanding industrial applications.
