High-speed aR characteristic fuse with 1100A rating, ceramic body, integrated striker indication, and DIN 80 blade terminals for industrial semiconductor protection applications.
£263.77
The Mersen P300255 is a specialist high-speed semiconductor protection fuse designed for use in demanding industrial power-electronic systems. As part of the established Mersen Protistor® range, it is intended to protect sensitive semiconductor devices against damaging short-circuit and overcurrent conditions.
High-speed fuses are engineered to operate more rapidly than conventional industrial fuses, limiting the electrical and thermal energy transferred to connected equipment during a fault. This makes the P300255 suitable for systems containing valuable components such as diodes, thyristors, rectifiers and insulated-gate bipolar transistors.
The Mersen P300255 manufacturer reference supports accurate identification when replacing an existing fuse or specifying components for new industrial equipment. The complete electrical ratings, dimensions and terminal configuration should be checked against the installed fuse, equipment documentation or current Mersen technical data before ordering.
Power-semiconductor components can be damaged within a very short period when subjected to excessive current. Dedicated high-speed fuses are therefore used to interrupt fault currents rapidly and limit the energy that reaches sensitive devices.
The Mersen P300255 is intended to support dependable protection within compatible power-conversion and motor-control equipment. Correct fuse selection remains essential, so the required current rating, voltage rating, breaking capacity, utilisation category, I²t performance and physical dimensions must be confirmed before installation.
| Current | 08 A |
|---|---|
| Item number | P300255 |
| Catalogue No | PC33UD69V1100A |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1100A With Striker DIN 80 Blades |
| EAN/UPC Code | 3605340325836 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 1100 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 1390 kA²s |
| Melting I2t | 240 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 | 160 W |
| HS Code | 85361090 |
The P300255 is a high-speed fuse intended to protect sensitive semiconductor devices and compatible industrial power-electronic equipment against damaging fault currents.
High-speed semiconductor fuses are commonly used to protect diodes, thyristors, rectifiers and IGBTs within power-conversion equipment.
It may be used in compatible variable speed drives and other industrial power-electronic systems when its complete electrical and mechanical specifications match the equipment requirements.
Compare the P300255 part number, current rating, voltage rating, utilisation category, breaking capacity, I²t characteristics, dimensions and terminal arrangement with the existing fuse and manufacturer documentation.
The fuse should be selected and installed by a suitably qualified electrical engineer or technician in accordance with applicable safety requirements and equipment manufacturer instructions.
Mersen Protistor® fuses are specified by electrical engineers, OEM manufacturers and maintenance teams for dependable high-speed protection of valuable industrial power-electronic equipment.
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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...