High-speed semiconductor protection fuse with ceramic body, DIN 110 blade terminals, integrated striker indication, rated 125A at 690-700VAC with 200kA breaking capacity.
£112.56
The Mersen T300121 is a manufacturer-specific industrial electrical protection component intended for use in compatible machinery, electrical control panels, power distribution assemblies and automation systems. Its dedicated Mersen reference helps engineers, maintenance departments and procurement teams identify the required component for replacement, repair and equipment-support applications.
Mersen manufactures specialist fuses and circuit protection products for industrial power systems, production machinery and demanding electrical installations. When correctly selected, these components help isolate electrical faults and reduce the risk of thermal or mechanical damage to cables, control devices, power equipment and connected machinery.
Detailed public technical specifications for the T300121 reference could not be reliably verified. Its rated current, operating voltage, protection or utilisation class, breaking capacity, terminal configuration and physical dimensions should therefore be confirmed from the product markings, original equipment documentation or official Mersen technical information before ordering or installation.
Industrial electrical protection components are used to interrupt or isolate circuits when abnormal current or fault conditions occur. Correctly specified protection can help limit damage to conductors, switching equipment, control devices, power components and connected machinery.
The Mersen T300121 should not be selected by physical appearance or mounting dimensions alone. Before installation, verify the complete manufacturer reference and all applicable electrical, mechanical and operating specifications against the original component, approved bill of materials or equipment manufacturer documentation.
| Current | 11 A |
|---|---|
| Item number | T300121 |
| Catalogue No | PC30UD69V125D1A |
| Description | Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 125A With Striker DIN 110 Blades |
| EAN/UPC Code | 3605340323665 |
| Rated voltage AC UL | 700 V |
| Rated voltage AC IEC | 690 V |
| Ampere Rating | 125 A |
| RoHS Compliant | Yes |
| AC or DC | AC |
| Speed/Characteristic | aR |
| Fuse Size | 30 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 4.9 kA²s |
| Melting I2t | 0.85 kA²s |
| AC Max I.R./Breaking Capacity | I1: 200 kA |
| Indication System | Yes |
| Indication System Type | Striker |
| Connection/Terminal Material | Silver-Plated Copper |
| Connection/Terminal Type | DIN 110 Blades |
| Product Width | 40 mm |
| Product Length | 134.6 mm |
| Product Height | 48 mm |
| Sell Pack Quantity | 3 EA |
| Sell Pack Weight | 0.8949 kg |
| Sell Pack Width | 135 mm |
| Sell Pack Length | 145 mm |
| Sell Pack Height | 55 mm |
| Product group | Semiconductor Protection Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.2983 kg |
| Power Dissipation at Rated Current Value | 30 W |
| HS Code | 85361090 |
| Country of Manufacture | France |
The Mersen T300121 is an industrial electrical protection component intended for use in compatible machinery, control, automation or power distribution equipment.
Yes. T300121 is the Mersen product reference and should be matched exactly against the original component or approved equipment documentation.
Check the markings on the original component, the equipment manual or official Mersen documentation to confirm its current rating, voltage rating, protection class and breaking capacity.
A replacement should not be selected by appearance alone. Its electrical ratings, operating characteristics, dimensions and terminal arrangement must all be compatible with the original installation.
The component should be selected and installed by suitably qualified electrical personnel in accordance with applicable regulations and the equipment manufacturer’s instructions.
Mersen electrical protection products are used by machine builders, panel manufacturers, electrical engineers and maintenance professionals across demanding industrial applications worldwide.
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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...