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MERSEN FUSE A 070 URD 33 KI 1000 A070URD33KI1000
High-speed fuse offering rapid interruption of fault currents up to 1000A at 690VAC (IEC) and 700VAC (UL) with Protistor® design and striker indication system.
£158.15
Why Choose the Mersen C300244 A070UD33KI1000 High-Speed Fuse?
The Mersen C300244 A070UD33KI1000 is a premium square body high-speed semiconductor fuse from the renowned Mersen Protistor® Size 33 aR series. Designed to deliver ultra-fast protection for sensitive semiconductor devices, it safeguards IGBTs, thyristors, diodes and rectifiers used in demanding industrial power conversion equipment.
The fuse is manufactured using precision die-cut fuse elements embedded in solidified silica sand to achieve excellent current-limiting performance, low let-through energy and a high interrupting capacity. Silver-plated contact surfaces and non-magnetic hardware ensure dependable long-term reliability, while the integrated striker indicator enables straightforward fuse monitoring and maintenance.
With a 1000 A current rating, 690 V AC IEC and 700 V AC UL voltage ratings, the C300244 is ideally suited for high-power drives, converters, UPS systems, renewable energy installations and industrial automation equipment requiring dependable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor fuse for critical power electronics.
- 1000 A rated current for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage ratings.
- 200 kA breaking capacity for severe fault conditions.
- Integrated striker indicator for remote fuse monitoring.
- Short slotted blade terminals provide secure bolted installation.
Key Features
- Mersen Protistor® Size 33 aR series.
- 1000 A rated current.
- 690 V AC IEC / 700 V AC UL.
- Square body ceramic fuse construction.
- Short slotted blade terminals.
- Integrated striker indication.
- Current-limiting design with low I²t characteristics.
- Designed specifically for semiconductor protection.
Reliable Protection for Industrial Power Electronics
High-speed semiconductor fuses are engineered to interrupt fault currents before sensitive semiconductor devices can suffer thermal or electrical damage. Their rapid operation reduces fault energy, improves equipment reliability and helps minimise costly downtime in demanding industrial power conversion systems.
The Mersen Protistor® Size 33 range is trusted worldwide by OEMs, panel builders and industrial engineers for protecting converters, drives, UPS systems and renewable energy installations where dependable semiconductor protection is essential.
Typical Applications
- Variable frequency drives.
- Industrial converters.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Industrial automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | C300244 | |
| Catalogue No | A070UD33KI1000 | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1000A With Striker Slotted Blades short | |
| EAN/UPC Code | 3605340325614 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 1000 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 990 kA²s | |
| Melting I2t | 170 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 | 155 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen C300244 used for?
It provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and rectifiers used in industrial power conversion equipment.
What is the current rating of this fuse?
The Mersen C300244 has a rated current of 1000 A.
What voltage is this fuse designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
Does this fuse include a striker indicator?
Yes. The fuse incorporates an integrated striker indicator that can be used with a compatible microswitch for remote status indication.
Where is this fuse commonly installed?
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor-based power conversion systems.
Trusted for Semiconductor Protection Worldwide
Mersen Protistor® high-speed semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide dependable protection for critical power electronic equipment.
