High-speed aR characteristic fuse for semiconductor protection rated at 315A with bolted mounting, striker indication, and open slot blades. Suitable for industrial and power electronics applications.
£177.85
The Mersen K300619 is an industrial electrical protection component designed to provide dependable circuit protection in demanding power distribution, automation and machinery applications. Manufactured by Mersen, a recognised specialist in electrical protection, the K300619 is intended for installations where reliable fault interruption and equipment protection are essential.
Mersen industrial fuses are engineered to help protect electrical equipment against damaging overcurrents and short-circuit conditions. Their robust construction makes them suitable for use in control panels, industrial machinery, power conversion equipment and other professionally engineered electrical systems.
The K300619 should be selected according to the electrical ratings, operating class, dimensions and mounting requirements shown on the product label or official Mersen technical documentation. Correct fuse coordination helps reduce equipment damage, improve installation safety and minimise operational downtime.
Industrial fuses protect cables, switching equipment and electrical components by interrupting excessive current before it causes serious thermal or mechanical damage. Correctly selected protection can help reduce fire risks, prevent equipment failure and improve the overall reliability of an electrical installation.
The Mersen K300619 is intended to form part of a properly designed protection system. Fuse ratings and characteristics must be matched to the circuit voltage, expected load, prospective fault current and the protection requirements of downstream equipment.
| Item number | K300619 |
|---|---|
| Catalogue No | PC72UD13C315EF |
| Description | Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 315A With Striker Open Slot Blades |
| EAN/UPC Code | 3605340331066 |
| Rated voltage AC UL | 1300 V |
| Rated voltage AC IEC | 1250 V |
| Ampere Rating | 315 A |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 72 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 125 kA²s |
| Melting I2t | 15.1 kA²s |
| AC Max I.R./Breaking Capacity | I1: 126 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Open Slot Blades |
| Product Width | 59 mm |
| Product Length | 149.4 mm |
| Product Height | 63 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.274 kg |
| Sell Pack Width | 157 mm |
| Sell Pack Length | 205 mm |
| Sell Pack Height | 80 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.758 kg |
| Power Dissipation at Rated Current Value | 76 W |
| HS Code | 85351000 |
The Mersen K300619 is used as an electrical protection component in compatible industrial circuits, machinery and power distribution equipment.
The rated current, voltage, operating class and breaking capacity should be confirmed using the product label or official Mersen technical documentation before installation.
A replacement should only be used when its electrical ratings, dimensions, operating characteristics and mounting arrangement match the original fuse requirements.
Installation should be completed by a suitably qualified electrical professional in accordance with applicable electrical regulations and equipment instructions.
It may be installed in compatible industrial control panels, machinery, power distribution equipment and electrical protection assemblies.
Mersen electrical protection products are used by engineers, panel builders, maintenance teams and equipment manufacturers to help protect critical industrial systems from damaging electrical faults.
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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...