High-speed Protistor® fuse delivering rapid arc quenching and reliable short-circuit protection up to 1100VAC IEC, 1200VAC UL, and 800A with striker indication and open slot blade terminals.
£292.42
The Mersen D300636 is an industrial electrical fuse designed to provide dependable overcurrent and short-circuit protection within compatible power distribution, control and power electronic equipment. Manufactured by Mersen, a recognised specialist in electrical protection, this fuse is suitable for maintenance, repair and original equipment applications where the exact D300636 reference is specified.
Correctly selected fuses help interrupt dangerous fault currents before excessive thermal or electrical stress damages cables, semiconductor components and connected equipment. The Mersen D300636 provides a replaceable protection component for industrial systems in which reliable circuit isolation and straightforward maintenance are important.
Its industrial construction makes it suitable for use in control panels, machinery, power conversion equipment and electrical assemblies. Before installation, the fuse rating, operating class, dimensions, terminal arrangement and breaking capacity should be checked against the equipment documentation or the fuse being replaced.
Electrical fuses protect equipment by opening a circuit when current exceeds the fuse’s specified operating limits. This helps reduce the risk of severe component damage, overheating and prolonged equipment downtime following an electrical fault.
Fuse selection must account for the rated current, voltage, utilisation category, time-current characteristic, breaking capacity and physical configuration. The Mersen D300636 should only be installed where the equipment documentation or original component specifies this exact reference or confirms full electrical and mechanical compatibility.
| Item number | D300636 |
|---|---|
| Catalogue No | PC73UD11C800EF |
| Description | Square Body High-Speed Fuse Protistor® Size 73 aR 1100VAC IEC 1200VAC UL 800A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340331394 |
| Rated voltage AC UL | 1200 V |
| Rated voltage AC IEC | 1100 V |
| Ampere Rating | 800 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 73 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 1230 kA²s |
| Melting I2t | 190 kA²s |
| AC Max I.R./Breaking Capacity | I1: 150 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Open Slot Blades |
| Product Width | 73 mm |
| Product Length | 149.4 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 1.11 kg |
| Sell Pack Width | 110 mm |
| Sell Pack Length | 180 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 1.11 kg |
| Power Dissipation at Rated Current Value | 148 W |
| HS Code | 85351000 |
The Mersen D300636 is used to provide overcurrent and short-circuit protection within compatible industrial electrical equipment.
It can be used where the original equipment specifies Mersen D300636. All electrical ratings, dimensions and terminal details should be checked before replacement.
Check the rated current, voltage, operating class, breaking capacity, time-current characteristic, dimensions and connection type against the equipment documentation.
It may be installed in compatible industrial control panels, machinery, power distribution systems and power electronic equipment.
No substitution should be made unless the alternative fuse has been approved by the equipment manufacturer and matches every required electrical and mechanical specification.
Mersen fuses are used by electrical engineers, equipment manufacturers and maintenance professionals to provide dependable protection for industrial power and control systems.
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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...