High-speed Protistor® fuse designed for power semiconductor protection with 900A rating, 690VAC IEC and 700VAC UL voltage ratings, featuring DIN 80 blades and striker indication system.
£231.78
The Mersen M300253 is a professional industrial electrical component identified by manufacturer reference M300253. It is intended for use with correctly matched Mersen electrical protection, power distribution or control equipment in maintenance, replacement and original equipment applications.
Accurate component selection is essential for maintaining electrical system reliability, reducing maintenance delays and preventing the installation of an unsuitable replacement. Ordering with the complete Mersen M300253 reference helps maintenance engineers, panel builders and procurement teams manage purchasing, scheduled servicing and engineering inventories more effectively.
Before ordering or installation, the exact product type, rated voltage, rated current, operating characteristics, connection arrangement, physical dimensions and mounting configuration should be verified against the original component, equipment documentation or current Mersen technical data.
Industrial electrical systems depend on components with correctly matched electrical, mechanical and performance characteristics. Products that appear visually similar may have different voltage ratings, current ratings, protection classes, terminal arrangements or installation dimensions.
Using the complete Mersen M300253 reference during procurement helps identify the required component, but the part number alone should not replace a full technical compatibility check. All relevant specifications should be confirmed before installation, particularly when replacing an older component or servicing safety-critical equipment.
| Current | 08 A |
|---|---|
| Item number | M300253 |
| Catalogue No | PC33UD69V900A |
| Description | Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 900A With Striker DIN 80 Blades |
| EAN/UPC Code | 3605340325799 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 900 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 33 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 770 kA²s |
| Melting I2t | 130 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 | 135 W |
| HS Code | 85361090 |
The Mersen M300253 is an industrial electrical component identified by Mersen manufacturer reference M300253 for use with correctly matched electrical protection, distribution or control equipment.
It may be suitable as a replacement when the complete manufacturer reference, product type, electrical ratings, operating characteristics, dimensions and connection arrangement match the original part.
Compare the full M300253 reference and all product markings with the existing component, equipment manual, electrical drawings and current Mersen technical documentation.
Yes. The rated voltage, rated current, protection or operating class and other electrical characteristics must be appropriate for the circuit and equipment in which the component will be installed.
Selection and installation should be completed by a suitably qualified electrical professional in accordance with the equipment instructions and applicable electrical safety requirements.
Mersen products are used by electrical engineers, panel builders, equipment manufacturers and maintenance professionals in industrial power management and electrical protection applications.
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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...