High-speed Protistor® fuse delivering reliable circuit protection for industrial and power electronic applications with a 1500A rating up to 600VAC (IEC) and 650VAC (UL). Features slotted blade design with integrated striker indication.
£336.77
The Mersen P300531 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 helps protect sensitive semiconductor devices against damaging short-circuit and overcurrent conditions.
High-speed fuses operate rapidly to restrict the thermal and electrical energy transferred to connected equipment during a fault. This makes the P300531 suitable for systems containing valuable power-semiconductor components such as diodes, thyristors, rectifiers and insulated-gate bipolar transistors.
The Mersen P300531 manufacturer reference enables maintenance engineers, OEMs and purchasing teams to identify the required component accurately. Before ordering or installation, its complete current rating, voltage rating, utilisation category, dimensions and terminal arrangement should be confirmed against the existing fuse or current Mersen technical documentation.
Power-semiconductor devices can suffer permanent damage within milliseconds when exposed to excessive fault current. Dedicated high-speed fuses are therefore used to interrupt faults rapidly and restrict the amount of energy reaching sensitive electronic components.
The Mersen P300531 is intended to provide dependable protection within compatible motor-control and power-conversion systems. Correct fuse selection is essential, so the required current rating, voltage rating, breaking capacity, utilisation category, I²t performance, dimensions and terminal configuration must be verified before installation.
| Item number | P300531 |
|---|---|
| Catalogue No | A060UD33LI1500 |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 600VAC IEC 650VAC UL 1500A With Striker Slotted Blades long |
| EAN/UPC Code | 3605340329858 |
| Rated voltage AC UL | 650 V |
| Rated voltage AC IEC | 600 V |
| Ampere Rating | 1500 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 2500 kA²s |
| Melting I2t | 470 kA²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Design Details | Reinforced Terminal |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | Slotted Blades |
| Product Width | 73 mm |
| Product Length | 153 mm |
| Product Height | 78.5 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 2.6298 kg |
| Sell Pack Width | 160 mm |
| Sell Pack Length | 250 mm |
| Sell Pack Height | 90 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.8766 kg |
| Power Dissipation at Rated Current Value | 210 W |
| HS Code | 85361090 |
The P300531 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 industrial power-conversion equipment.
It may be installed in compatible variable speed drives when its electrical ratings, operating characteristics and physical configuration match the equipment requirements.
Compare the complete part number, current rating, voltage rating, breaking capacity, utilisation category, I²t values, dimensions and terminal arrangement with the existing fuse and current Mersen 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 industrial maintenance teams for dependable high-speed protection of valuable 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...