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MERSEN FUSE 6,9 URD 31 D08 A 0800 6,9URD31D08A0800
High-speed fuse designed for power semiconductor protection with 800A rating, IEC 690VAC and UL 700VAC compatibility, built-in striker indication, and DIN 80 blade terminals.
£121.40
Why Choose the Mersen D300406 Protistor® High-Speed Semiconductor Fuse?
The Mersen D300406 is a genuine Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for sensitive power electronic equipment. Designed as an aR class semiconductor fuse, it delivers partial-range protection for diodes, thyristors, IGBTs and other semiconductor devices operating on 690 V AC (IEC) and 700 V AC (UL) systems.
Manufactured by Mersen, the D300406 (Catalogue No. PC31UD69V800A) features DIN 80 blade terminals, an integrated striker indicator, silver-plated contact surfaces and a robust ceramic square body construction. The fuse has been developed to minimise let-through energy while providing reliable protection for demanding industrial power conversion applications.
With an 800 A current rating, 200 kA breaking capacity and dual IEC/UL voltage ratings, the D300406 is ideally suited for protecting variable speed drives, industrial converters, UPS systems and renewable energy equipment where rapid semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 800 A rated current.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Integrated striker indicator for rapid fault identification.
- Silver-plated DIN 80 blade terminals for reliable electrical connections.
- 200 kA breaking capacity for dependable fault interruption.
Key Features
- Mersen Protistor® Size 31 semiconductor fuse.
- Catalogue number: PC31UD69V800A.
- 800 A current rating.
- 690 V AC IEC / 700 V AC UL.
- aR operating class.
- Integrated striker indication.
- DIN 80 blade terminals.
- Square body bolted mounting design.
Engineered for Critical Power Electronics
Protistor® semiconductor fuses are specifically designed to minimise fault energy during overload and short-circuit conditions. Their ultra-fast operating characteristics help protect expensive semiconductor devices, reducing equipment damage and improving system reliability in demanding industrial environments.
The D300406 combines high interrupting capacity with low I²t characteristics, making it an excellent choice for industrial automation, power conversion, renewable energy and motor drive applications requiring dependable semiconductor protection.
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 | D / D0 (Neozed/Diazed), Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | D300406 | |
| Catalogue No | PC31UD69V800A | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 800A With Striker DIN 80 Blades | |
| EAN/UPC Code | 3605340327915 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 800 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 31 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 880000 A²s | |
| Melting I2t | 140000 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 | DIN 80 Blades | |
| Product Width | 51 mm | |
| Product Length | 110 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.1598 kg | |
| Sell Pack Width | 143 mm | |
| Sell Pack Length | 167 mm | |
| Sell Pack Height | 64 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.3866 kg | |
| Power Dissipation at Rated Current Value | 120 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen D300406 used for?
The D300406 provides ultra-fast protection for power semiconductor devices including IGBTs, thyristors and diodes used in industrial power conversion equipment.
What is the current rating?
The fuse has a rated current of 800 A.
What voltage systems is it designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) installations.
Does the D300406 include a blown fuse indicator?
Yes. It incorporates an integrated striker mechanism that can operate a compatible microswitch for remote indication.
Which terminal configuration does this fuse use?
The D300406 is supplied with DIN 80 blade terminals for bolted installation.
Trusted Worldwide for Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted by OEMs, panel builders and industrial engineers worldwide to safeguard high-value power electronic equipment in demanding industrial applications.
