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MERSEN FUSE A070 URD 33 TTI 1100 A070URD33TTI1100
High-speed Protistor® Size 33 fuse rated 1100A at 690V AC IEC and 700V AC UL with integrated striker indication and flush ends with UNC threads for bolted mounting.
£159.74
Why Choose the Mersen D300452 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300452 is a genuine Protistor® Size 33 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for modern power electronic equipment. Manufactured as an aR class semiconductor fuse, it is specifically designed to protect diodes, thyristors, IGBTs and other sensitive semiconductor devices operating on 690 V AC (IEC) and 700 V AC (UL) systems. The fuse carries a 1100 A current rating and incorporates a striker indicator with flush-end UNC threaded terminals.
Manufactured by Mersen, Catalogue Number A070UD33TTI1100, the D300452 is part of the globally recognised Protistor® range. It features silver-plated contact surfaces, non-magnetic hardware and precision-manufactured fuse elements embedded in solidified silica sand, providing excellent current limitation, low let-through energy and dependable semiconductor protection.
With a 200 kA AC breaking capacity, robust square body construction and threaded flush-end connections, the D300452 is ideally suited for protecting industrial drives, UPS systems, converters, inverters and other high-power electronic equipment where rapid fault clearance is critical.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 1100 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for fast fault indication.
- Flush-end UNC threaded terminals for secure bolted installation.
- 200 kA interrupting capacity.
Key Features
- Mersen Protistor® Size 33 semiconductor fuse.
- Catalogue number: A070UD33TTI1100.
- 1100 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR operating class.
- Integrated striker indication.
- Flush-end UNC threaded terminals.
- Square body bolted mounting.
Engineered for Critical Power Electronics
Protistor® semiconductor fuses are designed to minimise fault energy during overloads and short circuits, helping protect expensive semiconductor devices while reducing equipment downtime. Their ultra-fast operating characteristics provide reliable protection for today's industrial power conversion systems.
The Mersen D300452 combines high interrupting capacity, low I²t performance and rugged construction to deliver dependable protection in demanding industrial applications including drives, UPS equipment, converters and renewable energy systems.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Semiconductor protection circuits.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | D300452 | |
| Catalogue No | A070UD33TTI1100 | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1100A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340328639 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 1100 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 1390 kA²s | |
| Melting I2t | 240 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 | 2.682 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 | 135 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen D300452 used for?
The D300452 provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and diodes used in industrial power conversion equipment.
What is the current rating?
The fuse has a rated current of 1100 A.
What voltage systems is it designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
Does the D300452 include a blown fuse indicator?
Yes. The fuse incorporates an integrated striker mechanism that can operate a compatible microswitch for remote indication.
What terminal style does this fuse use?
The D300452 uses flush-end UNC threaded terminals for secure bolted installation.
Trusted Worldwide for Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide by OEM manufacturers, panel builders and industrial engineers to protect valuable power electronic equipment operating in demanding industrial environments.
