High-speed Protistor® fuse with aR characteristic for semiconductor protection, rated 400A at 690VAC IEC and 700VAC UL, featuring a ceramic square body and integrated striker indication system.
£146.90
The Mersen P300186 is a high-performance Protistor® square body semiconductor fuse engineered to provide ultra-fast protection for sensitive power semiconductor devices. Designed for demanding industrial applications, it safeguards diodes, thyristors, IGBTs and other power electronic components from damaging overcurrent conditions while helping minimise equipment downtime.
As part of the renowned Mersen Protistor® Size 32 series, the P300186 combines high breaking capacity with low let-through energy, making it an ideal choice for variable speed drives, UPS systems, power converters and industrial automation equipment. Silver-plated contacts and a precision-engineered ceramic body ensure dependable long-term performance in demanding electrical environments.
Rated at 400 A with a 690 V AC IEC / 700 V AC UL voltage rating, the P300186 features DIN 110 blade terminals with an integrated striker indicator for reliable installation and maintenance within industrial power distribution and semiconductor protection systems.
High-speed semiconductor fuses are specifically designed to interrupt fault currents before they can damage expensive power electronic components. The Mersen Protistor® range offers exceptionally low I²t values and rapid fault clearance, helping extend equipment life while reducing repair costs and production downtime.
The P300186 is widely specified by OEMs and industrial engineers for applications requiring dependable protection of variable speed drives, rectifiers, inverters and power conversion equipment operating in demanding electrical environments.
| Current | 11 A |
|---|---|
| Item number | P300186 |
| Catalogue No | PC32UD69V400D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 32 aR 690VAC IEC 700VAC UL 400A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340324501 |
| 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 110 Blades |
| Product Width | 59 mm |
| Product Length | 134.6 mm |
| Product Height | 65 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 1.6899 kg |
| Sell Pack Width | 145 mm |
| Sell Pack Length | 195 mm |
| Sell Pack Height | 78 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.5633 kg |
| Power Dissipation at Rated Current Value | 75 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The P300186 is an ultra-fast semiconductor fuse designed to protect IGBTs, thyristors, diodes and other power semiconductor devices from overcurrent faults.
The fuse has a 400 A continuous current rating.
The P300186 is rated for 690 V AC (IEC) and 700 V AC (UL) operation.
Yes. The fuse incorporates an integrated striker indicator to assist with maintenance and fault identification.
It is commonly installed in variable speed drives, UPS systems, industrial converters, rectifiers, inverters and other semiconductor-based power equipment.
Mersen Protistor® semiconductor fuses are trusted by OEMs, machine builders and industrial engineers to provide dependable protection for high-value power electronic equipment operating in demanding industrial environments.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...