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MERSEN FUSE A 070 URD 31 KI 0630 A070URD31KI0630
High-speed fuse designed for semiconductor protection with a 630A rating, suitable for up to 690VAC (IEC) and 700VAC (UL) applications. Features striker indication and slotted blade terminals.
£112.77
Why Choose the Mersen A300035 Protistor® High-Speed Fuse?
The Mersen A300035 (A070UD31KI630) is a premium Protistor® square body high-speed semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic equipment. Featuring an aR operating characteristic, this fuse is specifically designed to protect IGBTs, thyristors, SCRs and diodes against damaging short-circuit faults in demanding industrial applications.
As part of the trusted Mersen Protistor® Size 31 series, the A300035 combines high interrupting capacity, low let-through energy and robust construction to maximise equipment protection while reducing downtime. Silver-plated contacts, solidified sand technology and an integrated striker indicator ensure dependable long-term performance in industrial environments.
With a 630 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the A300035 is ideally suited to variable speed drives, UPS systems, industrial converters, renewable energy equipment and high-power automation systems requiring reliable semiconductor protection.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 630 A rated current for high-power industrial equipment.
- 690 V AC IEC / 700 V AC UL rated voltage.
- 200 kA breaking capacity provides dependable fault interruption.
- Integrated striker indicator for convenient fuse monitoring.
- Silver-plated blade contacts ensure excellent electrical conductivity.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: A070UD31KI630.
- Item number: A300035.
- 630 A rated current.
- 690 V AC IEC / 700 V AC UL operation.
- aR operating characteristic.
- DIN 80 slotted short blade terminals.
- Integrated mechanical striker indicator.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive energy can damage expensive semiconductor devices. Their ultra-fast operation helps protect critical equipment, extend service life and reduce maintenance costs.
The Protistor® Size 31 range is widely specified by OEMs and industrial engineers for protecting power converters, motor drives, UPS systems and renewable energy installations where reliable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS systems.
- Renewable energy inverters.
- Industrial automation and power distribution equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | A300035 | |
| Catalogue No | A070UD31KI630 | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 630A With Striker Slotted Blades short | |
| EAN/UPC Code | 3605340322590 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 630 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 430000 A²s | |
| Melting I2t | 75000 A²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Slotted Blades | |
| Product Width | 51 mm | |
| Product Length | 129 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.203 kg | |
| Sell Pack Width | 157 mm | |
| Sell Pack Length | 166 mm | |
| Sell Pack Height | 62 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.401 kg | |
| Power Dissipation at Rated Current Value | 85 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen A300035 used for?
The A300035 provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, SCRs, thyristors and diodes used in industrial power electronic equipment.
What is the current rating of the A300035?
The fuse has a 630 A current rating.
What voltage is this fuse rated for?
The A300035 is rated for 690 V AC (IEC) and 700 V AC (UL).
What does the aR characteristic mean?
An aR fuse provides ultra-fast short-circuit protection for semiconductor devices and should be used together with suitable overload protection.
Which applications commonly use this fuse?
The fuse is widely used in industrial drives, UPS systems, power converters, renewable energy equipment and other semiconductor-based electrical installations.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering dependable protection for critical power electronic equipment in demanding industrial environments.
