High-performance Protistor® fuse with 550A rating, designed for rapid short-circuit interruption in industrial power electronics. Features a robust square ceramic body and DIN 80 striker blades for secure installation and indication.
£174.05
The Mersen H300249 is a professional-grade electrical protection component intended for use with compatible industrial power distribution, power conversion and machinery control equipment. Manufactured by Mersen, it is suitable for applications where dependable protection and accurate replacement-part identification are essential.
The H300249 manufacturer reference enables engineers, panel builders, maintenance professionals and purchasing teams to identify the required component precisely. Selecting a component with the correct Mersen reference helps preserve the electrical and mechanical characteristics specified for the original installation.
Before purchasing or installing the Mersen H300249, its rated voltage, rated current, protection category, breaking capacity, terminal arrangement and dimensions should be checked against the existing component and current Mersen technical documentation. The product should only be installed when every relevant specification is suitable for the application.
Correctly selected electrical protection components help limit the effects of short circuits, overcurrents and other abnormal electrical conditions. They can protect valuable machinery, conductors, control systems and power electronic equipment while helping reduce unplanned downtime.
The Mersen H300249 should be matched using its complete manufacturer reference and installed by a suitably qualified electrical professional. The operating voltage, current, protection characteristics, breaking capacity, mounting arrangement and environmental conditions must be verified before the equipment is energised.
| Current | 08 A |
|---|---|
| Item number | H300249 |
| Catalogue No | PC33UD69V550A |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 550A With Striker DIN 80 Blades |
| EAN/UPC Code | 3605340325713 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 550 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 155 kA²s |
| Melting I2t | 27 kA²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Design Details | Standard Terminal |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 80 Blades |
| Product Width | 73 mm |
| Product Length | 110 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.4369 kg |
| Sell Pack Width | 145 mm |
| Sell Pack Length | 250 mm |
| Sell Pack Height | 90 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.8123 kg |
| Power Dissipation at Rated Current Value | 110 W |
| HS Code | 85361090 |
The Mersen H300249 is an electrical protection component intended for use with compatible industrial power, machinery and electrical control equipment.
Compare the complete H300249 part number, electrical ratings, protection characteristics, terminal configuration and dimensions with the existing component and official Mersen documentation.
It may be used as a replacement where the original equipment documentation specifies the same Mersen reference and matching electrical and mechanical characteristics.
Confirm the rated voltage, rated current, protection category, breaking capacity, terminal arrangement, dimensions and operating environment before installation.
The component should be selected and installed by a suitably qualified electrical professional in accordance with the equipment instructions and applicable electrical regulations.
Mersen electrical protection products are used by engineers, panel builders, equipment manufacturers and maintenance professionals to support dependable operation in industrial power and control systems.
● 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...