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MERSEN FUSE 6,921 CP URGD 27.60 125 6,921CPURGD27.60/125
High-speed Protistor® fuse providing rapid fault interruption and superior protection for semiconductor devices at up to 690VAC. Features integrated striker for remote fault indication.
£46.96
Why Choose the Mersen D076823 Protistor® High-Speed Fuse?
The Mersen D076823 (FR27UD69V125T) is a premium Protistor® high-speed cylindrical semiconductor fuse engineered to provide rapid short-circuit protection for sensitive power semiconductor devices. Featuring an aR operating characteristic, it is specifically designed to protect IGBTs, thyristors, SCRs, diodes and rectifiers used in industrial power electronic equipment. The integrated striker indicator enables fast identification of an operated fuse, helping to minimise maintenance time and system downtime.
Manufactured in accordance with IEC 60269-1 and IEC 60269-4, the FR27UD69V125T features a robust 27 × 60 mm cylindrical design with an exceptionally high interrupting capacity. Its current-limiting design and low energy let-through characteristics help prevent costly damage to power semiconductor devices during fault conditions.
Rated at 125 A with a 690 V AC IEC voltage rating, this Protistor® fuse is ideally suited for industrial drives, UPS systems, power converters, inverters and renewable energy applications where reliable semiconductor protection is essential.
Key Advantages
- High-speed aR semiconductor protection fuse.
- 125 A current rating for industrial power electronics.
- 690 V AC IEC rated voltage.
- Integrated striker indication for rapid maintenance.
- 200 kA AC breaking capacity.
- Low I²t current-limiting performance protects sensitive semiconductor devices.
Key Features
- Mersen Protistor® Size 27 × 60 URGD series.
- Catalogue number: FR27UD69V125T.
- 125 A rated current.
- 690 V AC IEC rated voltage.
- aR operating class for semiconductor short-circuit protection.
- Integrated striker-type blown fuse indicator.
- High interrupting capacity of 200 kA.
- Ceramic body with silver-plated ferrule terminals.
Reliable Protection for Power Electronics
High-speed semiconductor fuses such as the Mersen FR27UD69V125T interrupt fault currents before excessive thermal energy can damage expensive power semiconductor devices. Their low energy let-through characteristics help improve equipment reliability while reducing maintenance costs and production downtime.
The Protistor® range is trusted worldwide for protecting variable frequency drives, industrial inverters, UPS systems, renewable energy installations and power conversion equipment where dependable semiconductor protection is critical.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial inverters.
- Power converters.
- UPS systems.
- Renewable energy equipment.
- Industrial automation and control panels.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | Semiconductor | |
| Fuse Size | 27x60 mm | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | D076823 | |
| Catalogue No | FR27UD69V125T | |
| Description | High-Speed Cylindrical Fuse Protistor® Size 27x60 aR 690VAC IEC 125A With Striker | |
| EAN/UPC Code | 3605340020014 | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 125 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 27x60 | |
| Mounting | Clip | |
| Clearing I2t At Rated Voltage | 13.6 kA²s | |
| Melting I2t | 3.425 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 200 kA | |
| Design Details | URGD | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Ferrule | |
| Product Diameter | 27 mm | |
| Product Length | 60.3 mm | |
| Sell Pack Quantity | 10 EA | |
| Sell Pack Weight | 0.8 kg | |
| Sell Pack Width | 123 mm | |
| Sell Pack Length | 138 mm | |
| Sell Pack Height | 30 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.08 kg | |
| Power Dissipation at Rated Current Value | 29.9 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen D076823 used for?
It provides high-speed short-circuit protection for sensitive semiconductor devices used in industrial power electronic systems.
What is the current rating of this fuse?
The Mersen D076823 has a rated current of 125 A.
What voltage is the FR27UD69V125T rated for?
The fuse is rated for operation at up to 690 V AC in accordance with IEC standards.
What does the striker indicator do?
The integrated striker provides a mechanical indication when the fuse has operated, allowing faster maintenance and optional remote indication when used with suitable accessories.
What does the aR operating class mean?
The aR operating class provides high-speed short-circuit protection for semiconductor devices and should be used alongside suitable overload protection.
Trusted by Industrial Engineers Worldwide
Mersen Protistor® semiconductor fuses are trusted globally for delivering dependable high-speed protection for critical industrial power electronic systems and automation equipment.
