Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE 6,9 URD 31 D11 A 0700 6,9URD31D11A0700
High-speed aR fuse designed for semiconductor protection up to 700A and 700VAC with built-in striker indication and DIN 110 blade terminals.
£114.02
Why Choose the Mersen R300027 Protistor® High-Speed Fuse?
The Mersen R300027 (PC31UD69V700D1A) is a premium Protistor® Size 31 square body high-speed semiconductor fuse engineered to provide ultra-fast protection for today's power conversion equipment. Featuring an aR ultra-fast operating characteristic, it is specifically designed to protect diodes, thyristors, IGBTs and other semiconductor devices against damaging short-circuit currents.
Manufactured using precision die-cut silver fuse elements embedded in solidified sand, the R300027 provides excellent current limitation, low let-through energy and a high interrupting rating. Silver-plated contacts, non-magnetic hardware and an integrated striker indicator deliver dependable long-term operation while simplifying maintenance and remote monitoring.
Rated at 700 A, with a 690 V AC IEC and 700 V AC UL voltage rating, the Mersen R300027 is ideally suited to protecting industrial drives, power converters, UPS systems, renewable energy equipment and other demanding semiconductor applications.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 700 A current rating.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Outstanding current-limiting performance with low I²t values.
- Integrated striker indicator for simplified maintenance.
- Designed specifically for the protection of IGBTs, thyristors and diode modules.
Key Features
- Mersen Protistor® Size 31 series.
- Catalogue number: PC31UD69V700D1A.
- aR ultra-fast operating characteristic.
- 700 A rated current.
- 690 V AC (IEC) / 700 V AC (UL).
- DIN 110 blade terminals.
- Integrated striker indicator.
- Ceramic square body with silver-plated contact surfaces.
Reliable Protection for Power Electronics
Protistor® semiconductor fuses are specifically designed to interrupt fault currents before expensive semiconductor devices can be damaged. Their ultra-fast response and exceptionally low let-through energy help improve equipment reliability, minimise downtime and reduce maintenance costs.
The Size 31 Protistor® range is widely used throughout industrial automation, motor drives, renewable energy systems, UPS installations and power conversion equipment where dependable semiconductor protection is essential.
Typical Applications
- Variable speed drives (VSDs).
- Industrial motor control systems.
- Power converters and inverters.
- Industrial rectifiers.
- UPS systems.
- Renewable energy power conversion equipment.
- Protection of IGBTs, thyristors and diode modules.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | R300027 | |
| Catalogue No | PC31UD69V700D1A | |
| Description | Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 700A With Striker DIN 110 Blades | |
| EAN/UPC Code | 3605340322514 | |
| 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 Copper | |
| Connection/Terminal Type | DIN 110 Blades | |
| Product Width | 51 mm | |
| Product Length | 134.6 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.2429 kg | |
| Sell Pack Width | 142 mm | |
| Sell Pack Length | 166 mm | |
| Sell Pack Height | 62 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.4143 kg | |
| Power Dissipation at Rated Current Value | 95 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen R300027 used for?
The Mersen R300027 provides ultra-fast short-circuit protection for semiconductor devices including IGBTs, thyristors, diodes and other power electronic components.
What is the current rating?
The R300027 has a rated current of 700 A.
What voltage is the fuse rated for?
It is rated at 690 V AC (IEC) and 700 V AC (UL).
What does the aR operating characteristic mean?
The aR classification identifies an ultra-fast semiconductor protection fuse intended to clear short-circuit faults while protecting sensitive semiconductor devices.
Does the fuse include a status indicator?
Yes. The R300027 incorporates an integrated striker indicator that can operate an optional field-mountable microswitch for remote indication.
Trusted Protection for Critical Industrial Systems
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide dependable protection for critical power electronic equipment operating in demanding industrial environments.
