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MERSEN FUSE A 070 URD 31 TTI 0700 A070URD31TTI0700
High-speed Protistor® fuse with aR characteristic, rated 690VAC IEC and 700VAC UL, 700A current capacity, ceramic square body, striker indication, flush ends with UNC threads for bolted mounting.
£109.33
Why Choose the Mersen K300481 Protistor® High-Speed Fuse?
The Mersen K300481 (A070UD31TTI700) is a premium square body high-speed semiconductor fuse from the trusted Protistor® Size 31 series. Designed with an ultra-fast aR operating characteristic, it provides outstanding protection for sensitive semiconductor devices including IGBTs, thyristors, diodes and MOSFETs used in demanding industrial power conversion equipment.
Manufactured using Mersen's advanced Protistor® technology, the K300481 delivers rapid fault interruption with exceptionally low let-through energy, helping prevent costly damage to semiconductor components during short-circuit events. Its ceramic square body, silver-plated contacts and solidified quartz sand construction provide reliable performance, excellent thermal stability and a high interrupting capacity for demanding industrial environments.
Rated at 700 A with a 690 V AC IEC / 700 V AC UL voltage rating, this fuse features flush threaded UNC terminals and an integrated striker indicator, making it ideal for use in variable speed drives, UPS systems, industrial converters and renewable energy applications.
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 MOSFET devices.
- 200 kA breaking capacity for dependable fault interruption.
- Integrated striker indicator for remote fuse monitoring.
Key Features
- Mersen Protistor® Size 31 series.
- Catalogue number A070UD31TTI700.
- 700 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Flush threaded UNC terminals.
- Integrated striker indicator.
- Silver-plated contact surfaces.
- Ceramic body with solidified sand arc-quenching technology.
- Very low I²t for superior semiconductor protection.
Reliable Semiconductor Protection for Industrial Power Systems
High-speed semiconductor fuses are specifically engineered to interrupt fault currents before expensive power electronic components can be damaged. Their ultra-fast response and low let-through energy improve equipment reliability, reduce maintenance costs and minimise production downtime in demanding industrial applications.
The Mersen Protistor® Size 31 range is widely specified by OEMs and industrial engineers for protecting variable speed drives, industrial converters, UPS systems, rectifiers 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 | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | K300481 | |
| Catalogue No | A070UD31TTI700 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 700A With Striker Flush ends UNC threads | |
| EAN/UPC Code | 3605340329100 | |
| 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 | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 540000 A²s | |
| Melting I2t | 95000 A²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Brass | |
| Connection/Terminal Type | Flush ends | |
| Product Width | 51 mm | |
| Product Length | 50.6 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.155 kg | |
| Sell Pack Width | 85 mm | |
| Sell Pack Length | 168 mm | |
| Sell Pack Height | 65 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.385 kg | |
| Power Dissipation at Rated Current Value | 85 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen K300481 used for?
It provides ultra-fast protection for semiconductor devices including IGBTs, thyristors, MOSFETs and power diodes used in industrial power conversion equipment.
What is the current rating of this fuse?
The Mersen K300481 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 installations and other power electronic equipment.
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.
