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MERSEN FUSE 6,9 URD 32 D08 A 0400 6,9URD32D08A0400
High-speed Protistor® fuse providing dependable protection for power semiconductors with integrated striker indication, rated 400A at 690VAC IEC and 700VAC UL.
£86.05
Why Choose the Mersen E300177 Protistor® High Speed Fuse?
The Mersen E300177, catalogue number PC32UD69V400A, is a premium square body high speed semiconductor fuse engineered to deliver ultra-fast protection for sensitive power electronic equipment. As part of the proven Mersen Protistor® Size 32 series, it is specifically designed to protect IGBTs, thyristors, diodes and other semiconductor devices from damaging short circuits and fault currents.
Designed for demanding industrial environments, the E300177 offers exceptional current limiting performance with low let-through energy to help minimise damage to expensive equipment. Precision die-cut fuse elements embedded in solidified sand, together with silver-plated contact surfaces and non-magnetic hardware, provide dependable long-term protection for modern power conversion systems.
With a 400 A current rating and a 690 V AC IEC / 700 V AC UL voltage rating, the Mersen E300177 is ideally suited to variable frequency drives, UPS systems, converters, renewable energy installations and industrial automation equipment where reliable semiconductor protection is essential.
Key Advantages
- Ultra-fast aR semiconductor protection fuse.
- 400 A current rating for demanding industrial applications.
- 690 V AC IEC / 700 V AC UL voltage rating.
- Protects IGBTs, thyristors and diode modules.
- Low I²t characteristics reduce damage during short-circuit faults.
- Silver-plated contacts provide excellent conductivity and long service life.
Key Features
- Mersen Protistor® Size 32 series.
- 400 A rated current.
- 690 V AC IEC / 700 V AC UL rated voltage.
- aR ultra-fast operating characteristic.
- Square body fuse with DIN 80 blade terminals.
- Integrated striker indicator for remote status indication.
- 200 kA breaking capacity.
- RoHS compliant construction.
Reliable Protection for Industrial Power Electronics
High speed semiconductor fuses are designed to interrupt fault currents before expensive power electronic components can be damaged. The Mersen Protistor® range delivers exceptionally fast fault clearing with low I²t values, helping maximise equipment reliability while reducing costly downtime.
The E300177 is widely used in industrial motor drives, power converters and automation systems, providing dependable protection for critical semiconductor devices operating in demanding industrial environments.
Typical Applications
- Variable frequency drives (VFDs).
- Industrial motor control systems.
- Power converters and rectifiers.
- UPS and standby power systems.
- Renewable energy inverter systems.
- Industrial automation and OEM machinery.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Fuse Type | D / D0 (Neozed/Diazed), Semiconductor | |
| Fuse Class | aR | |
| Voltage | 690 V | |
| Item number | E300177 | |
| Catalogue No | PC32UD69V400A | |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 400A With Striker DIN 80 Blades | |
| EAN/UPC Code | 3605340324327 | |
| Rated voltage AC UL | 700 V | |
| Rated voltage AC IEC | 690 V | |
| Ampere Rating | 400 A | |
| RoHS Compliant | Yes | |
| AC or DC | AC | |
| Speed/Characteristic | aR | |
| Fuse Size | 32 | |
| Mounting | Bolted | |
| Clearing I2t At Rated Voltage | 90 kA²s | |
| Melting I2t | 15 kA²s | |
| 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 | 59 mm | |
| Product Length | 110 mm | |
| Product Height | 65 mm | |
| Sell Pack Quantity | 3 EA | |
| Sell Pack Weight | 1.5879 kg | |
| Sell Pack Width | 140 mm | |
| Sell Pack Length | 195 mm | |
| Sell Pack Height | 75 mm | |
| Product group | Semiconductor Protection Fuses | |
| Body/Insulating Material | Ceramic | |
| Product Weight | 0.5293 kg | |
| Power Dissipation at Rated Current Value | 75 W | |
| HS Code | 85361090 | |
| Country of Manufacture | France |
Frequently Asked Questions
What is the Mersen E300177 used for?
The E300177 provides ultra-fast protection for semiconductor devices such as IGBTs, thyristors and diodes used in industrial power conversion equipment.
What is the current rating of this fuse?
The Mersen E300177 has a 400 A rated current.
What voltage is the fuse designed for?
It is rated for 690 V AC (IEC) and 700 V AC (UL) applications.
What does the aR operating characteristic mean?
The aR operating class provides partial-range ultra-fast protection specifically designed for semiconductor devices against short-circuit faults.
Where is this fuse commonly installed?
It is commonly installed in variable speed drives, converters, UPS systems, renewable energy equipment and industrial power electronic installations.
Trusted for Semiconductor Protection Worldwide
Mersen Protistor® semiconductor fuses are trusted worldwide by OEMs, panel builders and industrial engineers to provide dependable protection for critical power electronic equipment in demanding industrial applications.
