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MERSEN FUSE 6,9 URD 33 D08 A 0700 6,9URD33D08A0700
High-speed Protistor® fuse with aR characteristic for semiconductor protection, rated 700A at 690VAC IEC and 700VAC UL, featuring integrated striker and DIN 80 blade terminals.
£121.97
Why Choose the Mersen K300251 Protistor® High-Speed Fuse?
The Mersen K300251 (PC33UD69V700A) is a premium square body high-speed semiconductor fuse engineered to provide exceptional protection for sensitive power electronic equipment. Part of the trusted Mersen Protistor® Size 33 series, this ultra-fast aR fuse is specifically designed to protect diodes, thyristors, IGBTs and other semiconductor devices used in demanding industrial power conversion applications.
Designed to deliver rapid fault interruption with exceptionally low let-through energy, the K300251 helps minimise damage during short-circuit conditions while reducing costly downtime. Its ceramic body, silver-plated contact surfaces and solidified sand construction provide excellent electrical performance, high interrupting capacity and dependable long-term reliability in harsh industrial environments.
With a rated current of 700 A and a 690 V AC IEC / 700 V AC UL voltage rating, the K300251 is ideally suited to variable speed drives, UPS systems, industrial converters, renewable energy systems and other high-power electronic installations where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors, diodes and other semiconductor devices.
- 200 kA breaking capacity for dependable fault protection.
- Integrated striker indicator for remote monitoring.
Key Features
- Mersen Protistor® Size 33 series.
- Catalogue number PC33UD69V700A.
- 700 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- DIN 80 blade terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Ceramic body with solidified sand arc-quenching technology.
- Low I²t characteristics for optimum semiconductor protection.
Reliable Semiconductor Protection for Industrial Power Systems
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive power electronic devices can be damaged. Their ultra-fast operation and low let-through energy improve equipment reliability while reducing maintenance costs and unplanned downtime.
The Mersen Protistor® Size 33 range is trusted worldwide by OEMs and industrial engineers for protecting variable speed drives, industrial converters, UPS systems and renewable energy equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives.
- Industrial power converters.
- IGBT inverter protection.
- Thyristor and diode rectifiers.
- UPS systems.
- Renewable energy inverters.
- Motor control centres.
- Industrial automation equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | D / D0 (Neozed/Diazed), Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | K300251 | |
| Catalogue No | PC33UD69V700A | |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 700A With Striker DIN 80 Blades | |
| EAN/UPC Code | 3605340325751 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 700 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 33 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 330 kA²s | |
| Melting I2t | 57 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 | DIN 80 Blades | |
| Product Width | 73 mm | |
| Product Length | 110 mm | |
| Product Height | 78.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 2.4369 kg | |
| Sell Pack Width | 145 mm | |
| Sell Pack Length | 250 mm | |
| Sell Pack Height | 90 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.8123 kg | |
| Power Dissipation at Rated Current Value | 125 W | |
| HS Code | 85361090 |
Frequently Asked Questions
What is the Mersen K300251 used for?
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors and power diodes used in industrial power conversion equipment.
What is the current rating of this fuse?
The Mersen K300251 has a 700 A current rating.
What voltage is this fuse designed for?
The fuse is rated for 690 V AC (IEC) and 700 V AC (UL).
Does this fuse include an indicator?
Yes. It incorporates an integrated striker indicator that can operate a compatible microswitch for remote fuse status indication.
What applications is this fuse suitable for?
It is ideal for protecting semiconductors in industrial drives, converters, UPS systems, renewable energy equipment and other high-power electronic applications.
Trusted by Industrial Power Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs and industrial engineers for delivering reliable protection, high interrupting capacity and dependable performance in demanding power electronic applications.
