High-speed fuse designed for semiconductor protection with a rated voltage of 690VAC IEC and 700VAC UL, rated at 1250A, featuring a striker indication system and DIN 80 blade terminals.
£290.66
The Mersen Q300256 is a genuine Mersen industrial electrical protection component intended for maintenance and replacement within compatible fuse protection, power distribution and electrical control equipment. Its unique Q300256 manufacturer reference helps engineers, panel builders and maintenance professionals identify the required part accurately when servicing established industrial systems.
Mersen specialises in circuit protection, semiconductor protection and electrical power management solutions for demanding industrial applications. Selecting an original Mersen component helps maintain equipment compatibility, installation integrity and dependable long-term performance.
The Mersen Q300256 should be selected where this exact reference appears on the original component, equipment documentation or approved spare-parts list. As verified public technical data for this specific reference is limited, its electrical ratings, dimensions, terminal arrangement and mounting configuration should be confirmed against authorised Mersen documentation before ordering or installation.
Correctly specified electrical protection components help preserve the safe and reliable operation of control panels, industrial machinery and power distribution systems. Matching the exact manufacturer reference reduces the risk of unsuitable substitutions, installation delays and avoidable equipment downtime.
Before fitting the Mersen Q300256, compare its complete identification, dimensions, connection arrangement and electrical characteristics with the existing component, equipment drawings and approved bill of materials. Installation should only be completed with the equipment safely isolated and in accordance with applicable electrical regulations.
| Current | 08 A |
|---|---|
| Item number | Q300256 |
| Catalogue No | PC33UD69V1250A |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1250A With Striker DIN 80 Blades |
| EAN/UPC Code | 3605340325850 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 1250 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 2053 kA²s |
| Melting I2t | 355 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 | 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 | 180 W |
| HS Code | 85361090 |
The Mersen Q300256 is an industrial electrical protection component identified by the manufacturer part number Q300256.
It is intended for maintenance or replacement within compatible fuse protection, electrical control or power distribution equipment that specifies this exact Mersen reference.
Compare the Q300256 reference, dimensions, electrical ratings, terminal arrangement and mounting configuration with the original component or approved equipment documentation.
No. The complete voltage, current and operating characteristics should be verified using authorised Mersen documentation or the information marked on the original component.
Installation should be carried out by a suitably qualified electrical engineer or technician following the equipment manufacturer's instructions and applicable safety regulations.
Mersen electrical protection products are specified by equipment manufacturers, panel builders and maintenance professionals to support dependable power distribution and long-term industrial system performance.
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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...