MERSEN FUSE 12,5 URD 73 TTF 0700 12,5URD73TTF0700

High-speed Protistor® fuse with aR characteristic, rated 700A, 1250VAC IEC and 1300VAC UL, featuring flush striker ends and metric threads for secure installation.

SKU: R300510Alt SKU: PC73UD13C700TFMPN: R300510

List Price £243.30 ex VAT

Your Price (ex VAT)

£243.30

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Manufacturer Lead Time

£243.30

Why Choose the Mersen R300510 Industrial Electrical Component?

The Mersen R300510 is a genuine Mersen industrial electrical component intended for professional maintenance, repair and replacement applications. Identified by the precise manufacturer reference R300510, it enables engineers, panel builders, purchasing teams and maintenance professionals to source the required part when this exact reference appears in equipment documentation, electrical drawings or approved spare-parts lists.

Mersen is an established manufacturer of electrical protection and power-management products for demanding commercial and industrial systems. Selecting an original Mersen component with the correct manufacturer reference helps support dependable equipment operation, simplify procurement and reduce the risk of installing an unsuitable replacement.

The exact product classification, electrical ratings, dimensions, terminal arrangement and mounting requirements of the R300510 should be confirmed against current Mersen technical documentation before ordering or installation. Engineers should also compare the complete markings on the existing component to verify that the replacement is suitable for the intended equipment and application.

Key Advantages

Genuine Mersen industrial electrical component.
Clearly identified by manufacturer reference R300510.
Suitable for professional maintenance, repair and replacement projects.
Supports accurate component identification and procurement.
Produced by an established electrical protection manufacturer.
Suitable for engineers, OEMs, panel builders and maintenance teams.

Key Features

Mersen branded industrial component.
Manufacturer part number R300510.
Intended for professional industrial electrical applications.
Suitable for replacing an installed component carrying the same reference.
Supports planned maintenance and equipment refurbishment programmes.
Manufacturer-specific identification simplifies spare-parts management.
Compatibility should be verified before ordering or installation.
Installation should be completed by suitably qualified personnel.

Reliable Component Selection for Industrial Systems

Industrial electrical systems frequently require replacement components to match an exact manufacturer reference. Correct part-number matching helps ensure that the selected component has the appropriate electrical characteristics, physical dimensions, terminal configuration and mounting arrangement for the intended equipment.

Before installing the Mersen R300510, the complete markings on the original component should be compared with the equipment manual, electrical schematics and current manufacturer information. Voltage, current, connection method, mounting format and system compatibility must all be verified before the equipment is commissioned or returned to service.

Typical Applications

Industrial electrical maintenance.
Machinery servicing and repair.
Electrical control panel refurbishment.
Power distribution equipment maintenance.
OEM equipment replacement projects.
Industrial spare-parts inventories.

Technical Specifications

Item number	R300510
Catalogue No	PC73UD13C700TF
Description	Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 700A With Striker Flush ends metric threads
EAN/UPC Code	3605340329568
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1250 V
Ampere Rating	700 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	73
Mounting	Bolted
Clearing I2t At Rated Voltage	900 kA²s
Melting I2t	114 kA²s
AC Max I.R./Breaking Capacity	I1: 126 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	73 mm
Product Length	74 mm
Product Height	78.5 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	1.22 kg
Sell Pack Width	110 mm
Sell Pack Length	125 mm
Sell Pack Height	75 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	1.22 kg
Power Dissipation at Rated Current Value	135 W
HS Code	85351000
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1250 V

Frequently Asked Questions

What is the Mersen R300510?

The R300510 is a Mersen industrial electrical component identified by its manufacturer-specific reference. Its exact product type, configuration and technical ratings should be confirmed using current Mersen documentation.

How can I confirm that the R300510 is compatible with my equipment?

Compare the complete part number and product markings with the installed component, equipment manual, electrical drawings and current Mersen technical information.

Can the R300510 replace a component with a different part number?

A component with a different reference should only be used when its electrical ratings, dimensions, terminal arrangement and manufacturer-approved compatibility have been fully verified.

Who should install the Mersen R300510?

Installation should be completed by a suitably qualified electrical engineer or technician following the applicable isolation, inspection and electrical safety procedures.

Where is this component typically used?

The R300510 may be used in industrial machinery, electrical panels, power equipment and maintenance applications where this exact Mersen reference is specified.

Trusted Industrial Electrical Solutions

Mersen products are used by engineers, equipment manufacturers, panel builders and maintenance professionals to support dependable electrical protection, power management and industrial system operation.

Item number	R300510
Catalogue No	PC73UD13C700TF
Description	Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 700A With Striker Flush ends metric threads
EAN/UPC Code	3605340329568
Rated voltage AC UL	1300 V
Rated voltage AC IEC	1250 V
Ampere Rating	700 A
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	73
Mounting	Bolted
Clearing I2t At Rated Voltage	900 kA²s
Melting I2t	114 kA²s
AC Max I.R./Breaking Capacity	I1: 126 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	73 mm
Product Length	74 mm
Product Height	78.5 mm
Sell Pack Quantity	1 EA
Sell Pack Weight	1.22 kg
Sell Pack Width	110 mm
Sell Pack Length	125 mm
Sell Pack Height	75 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	1.22 kg
Power Dissipation at Rated Current Value	135 W
HS Code	85351000
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	1250 V

UK delivery

Delivery options

Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.

This product Lead time on request

Please contact us for a delivery time before you order

Standard delivery

£8 ex VAT · free over £200

UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.

Heavier items may be charged at a weight-based or pallet rate, shown at checkout.

Collect from our showroom

Mon–Fri, 8am–5pm

Order and pay online, then collect from our showroom.

Please allow 15–30 minutes after ordering for us to prepare your order.

Northern Ireland, ROI & export

Priced at checkout

We deliver to Northern Ireland, the Republic of Ireland and overseas.

Delivery is calculated at checkout based on your destination.

Orders with mixed availability

Shipped complete

If part of your order is on a lead time, we hold it and send everything together.

Need the in-stock items sooner? Ask us and we can split the delivery.

Business customer returns

Returns & order support

Need to return an item? Find the guidance for your order below, then contact our team before sending anything back.

Stocked items

Request within 30 days

Changed your mind or ordered the wrong item? Request a return within 30 days of receipt. There is no restocking charge.

Items must be unused, in resalable condition and in their original packaging, and returns need our approval first. Return carriage is at your cost, and the original delivery charge is not refunded.

Faulty or damaged items

Tell us as soon as possible

Faulty, damaged on delivery or the wrong product supplied? Contact our team as soon as possible with the details.

We will review the issue and arrange an appropriate resolution under our terms and conditions and your statutory rights.

Made-to-order items

Manufacturer approval needed

Manufactured, configured and special-order products can only be returned with the manufacturer’s approval. Any handling charge is agreed with you when you request the return.

This does not affect claims for faulty goods or items that do not meet the agreed specification.

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Let’s get your return sorted.

Send your order number, product details and reason for return. For faults or delivery damage, include photographs if available. We will confirm the next steps.

Email returns team 01706 242050

The 30-day return request period applies to change-of-mind returns for stocked items. It does not limit your statutory rights for faulty or non-conforming goods.

● Service Agreements

Credit Accounts

Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.

Priority sourcing and supply support

Flexible payment terms for qualifying organisations

Support for engineering, maintenance, and operations

500 +

Stock lines ready to ship

1,000 +

Same day dispatches

3500 +

Customers supported

28 Trusted Manfacturers

● frequently asked questions

Common questions about our products and support

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.

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