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 11 URD 71 EF 0550 PC71UD11C550EF
High-speed Protistor® fuse with aR characteristic, rated for 550A and up to 1200VAC, featuring a ceramic square body and striker indication system with open slot blades for bolted mounting.
£121.97
Why Choose the Mersen G300616 Protistor® High-Speed Fuse?
The Mersen G300616 (PC71UD11C550EF) is a premium square body high-speed semiconductor fuse engineered to provide rapid protection for sensitive power electronic equipment. Part of the proven Mersen Protistor® Size 71 aR series, it is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices used in industrial power conversion systems.
Featuring an ultra-fast aR operating characteristic, the fuse limits fault energy during short circuits, helping prevent costly damage to semiconductor components. Its solidified sand arc-quenching technology, silver-plated contacts and non-magnetic hardware ensure dependable performance and long service life in demanding industrial environments.
With a 550 A current rating, 1100 V AC IEC / 1200 V AC UL voltage rating and an integrated striker indicator, the G300616 is ideal for industrial drives, UPS systems, renewable energy equipment, converters and other high-power electronic installations.
Key Advantages
- Ultra-fast aR semiconductor protection fuse for critical power electronics.
- 550 A current rating for demanding industrial applications.
- 1100 V AC IEC and 1200 V AC UL voltage ratings.
- Provides reliable protection for IGBTs, thyristors, SCRs and diode modules.
- Integrated striker indicator for easy fuse status monitoring.
- Low let-through energy helps minimise semiconductor damage.
Key Features
- Mersen Protistor® Size 71 aR series.
- Catalogue number: PC71UD11C550EF.
- 550 A rated current.
- 1100 V AC IEC / 1200 V AC UL rated voltage.
- Square body fuse with open slot blade terminals.
- Integrated striker indication.
- Silver-plated contact surfaces.
- Designed specifically for semiconductor protection applications.
Reliable Protection for Power Electronics
High-speed semiconductor fuses are designed to interrupt fault currents before excessive thermal energy can damage expensive electronic components. Their ultra-fast response significantly reduces let-through current, helping maximise equipment reliability and minimise downtime.
The Mersen Protistor® range is trusted by OEMs and maintenance engineers worldwide for protecting industrial drives, converters, UPS systems and renewable energy equipment where reliable semiconductor protection is essential.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor drives.
- Power converters and rectifiers.
- UPS and backup power systems.
- Renewable energy inverters.
- Protection of IGBT, SCR 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 | 1100 V | |
| Item number | G300616 | |
| Catalogue No | PC71UD11C550EF | |
| Description | Square Body High-Speed Fuse Protistor® Size 71 aR 1100VAC IEC 1200VAC UL 550A With Striker Open Slot Blades | |
| EAN/UPC Code | 3605340331011 | |
| Rated voltage AC UL | 1200 V | |
| Rated voltage AC IEC | 1100 V | |
| Ampere Rating | 550 A | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 71 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 548 kA²s | |
| Melting I2t | 84 kA²s | |
| AC Max I.R./Breaking Capacity | I1: 167 kA | |
| Indication System | Yes | |
| Indication System Type | Striker | |
| Connection/Terminal Material | Silver-Plated Copper | |
| Connection/Terminal Type | Open Slot Blades | |
| Product Width | 51 mm | |
| Product Length | 149.4 mm | |
| Product Height | 56.5 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.62 kg | |
| Sell Pack Width | 140 mm | |
| Sell Pack Length | 174 mm | |
| Sell Pack Height | 71 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.54 kg | |
| Power Dissipation at Rated Current Value | 112 W | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen G300616 used for?
The G300616 is a high-speed semiconductor fuse designed to protect sensitive power electronic devices such as IGBTs, thyristors and rectifiers against damaging short-circuit currents.
What is the current rating of this fuse?
This fuse has a 550 A rated current.
What voltage is the fuse rated for?
The fuse is rated for 1100 V AC (IEC) and 1200 V AC (UL).
What is the purpose of the striker indicator?
The integrated striker provides a mechanical indication when the fuse has operated and can be used with compatible microswitch accessories for remote signalling.
Where is this fuse typically installed?
It is commonly installed in industrial drives, converters, UPS systems, renewable energy equipment and other semiconductor protection applications.
Trusted for Industrial Semiconductor Protection
Mersen Protistor® semiconductor fuses are trusted worldwide for delivering rapid fault interruption, dependable protection and long service life in demanding industrial power electronic applications.
