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MERSEN FUSE A 070 URD 33 KI 1100 A070URD33KI1100
Rapid circuit protection fuse designed for industrial and power electronics with integrated striker and slotted blades, rated at 1100A, 690VAC IEC, and 700VAC UL.
£162.11
Why Choose the Mersen D300245 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300245 is a genuine Protistor® Size 33 square body high-speed semiconductor fuse designed to provide ultra-fast protection for sensitive power electronic equipment. This aR class fuse delivers partial-range protection for semiconductors including IGBTs, thyristors and diodes operating on 690 V AC (IEC) and 700 V AC (UL) systems. It has a 1100 A current rating, making it suitable for demanding industrial power conversion applications.
Manufactured by Mersen, the D300245 features short slotted blade terminals, an integrated striker indicator, silver-plated contacts and a rugged square body construction engineered for high reliability and low let-through energy. These characteristics help protect expensive semiconductor devices while simplifying maintenance and fault indication.
Designed for industrial drives, converters, UPS systems and renewable energy equipment, the D300245 combines a 200 kA breaking capacity with proven Protistor® performance to minimise equipment damage during short circuits and overload conditions.
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 rapid maintenance.
- Short slotted silver-plated blade terminals.
- 200 kA AC breaking capacity.
Key Features
- Mersen Protistor® Size 33 semiconductor fuse.
- Catalogue number: A070UD33KI1100.
- 1100 A rated current.
- 690 V AC IEC / 700 V AC UL.
- aR operating class.
- Integrated striker indication.
- Short slotted blade terminals.
- Square body bolted mounting.
Designed for Demanding Power Electronics
Protistor® semiconductor fuses are engineered to minimise fault energy during overload and short-circuit conditions, helping to extend the service life of valuable semiconductor devices. Their fast operating characteristics make them ideal for protecting high-power converters, motor drives and industrial power supplies.
With silver-plated terminals, non-magnetic hardware and a high interrupting capacity, the Mersen D300245 provides dependable protection for demanding industrial installations where equipment uptime is critical.
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 | D300245 | |
| Catalogue No | A070UD33KI1100 | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1100A With Striker Slotted Blades short | |
| EAN/UPC Code | 3605340325638 | |
| 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 Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 73 mm | |
| Product Length | 134 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.5353 kg | |
| Sell Pack Width | 145 mm | |
| Sell Pack Length | 245 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.8451 kg | |
| Power Dissipation at Rated Current Value | 160 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen D300245 used for?
The D300245 protects power semiconductor devices including IGBTs, thyristors and diodes against overloads and short circuits.
What is the current rating?
The fuse has a rated current of 1100 A.
What voltage is it designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) systems.
Does it include a blown fuse indicator?
Yes. The fuse incorporates an integrated striker indicator for fast fault identification.
Which industries commonly use this fuse?
It is widely used in industrial automation, renewable energy, UPS equipment, motor drives and power conversion systems.
Trusted Worldwide for Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and industrial engineers worldwide to protect high-value power electronic equipment operating in demanding industrial environments.
