MERSEN FUSE A 070 URD 33 LI 1000 A070URD33LI1000

High-speed fuse engineered for rapid and reliable protection of power electronics in critical industrial applications, compliant with IEC and UL standards.

SKU: R300234Alt SKU: A070UD33LI1000MPN: R300234

List Price £260.99 ex VAT

Your Price (ex VAT)

£260.99

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Manufacturer Lead Time

£260.99

Why Choose the Mersen R300234 Industrial Electrical Component?

The Mersen R300234 is a genuine Mersen industrial electrical component intended for professional maintenance, repair and replacement requirements. Its precise manufacturer reference enables engineers, panel builders and purchasing teams to identify the component required for compatible electrical equipment and industrial machinery.

Mersen is a recognised manufacturer of electrical protection and power-management products for demanding industrial environments. Selecting an original component with the correct reference helps preserve equipment reliability, simplify spare-parts procurement and reduce the risk of fitting an unsuitable substitute.

The R300234 should be selected where Mersen part number R300234 is specified by the equipment manufacturer, electrical drawings or existing product markings. Its electrical ratings, dimensions, terminal arrangement and mounting requirements must be verified against current Mersen technical documentation before ordering or installation.

Key Advantages

Genuine Mersen industrial electrical component.
Clearly identified by manufacturer reference R300234.
Suitable for professional maintenance, repair and replacement work.
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 R300234.
Designed for professional industrial electrical applications.
Suitable for replacing a component carrying the same manufacturer reference.
Supports planned maintenance and equipment refurbishment programmes.
Manufacturer-specific identification simplifies stock management.
Intended for installation by suitably qualified personnel.
Compatibility should be verified before purchase and installation.

Reliable Component Selection for Industrial Systems

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

Before installing the Mersen R300234, the complete markings on the original component should be compared with the equipment manual, electrical schematics and current manufacturer documentation. Voltage, current, terminal layout, mounting method and system compatibility must all be confirmed before the equipment is 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	R300234
Catalogue No	A070UD33LI1000
Description	Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1000A With Striker Slotted Blades long
EAN/UPC Code	3605340325416
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	1000 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	33
Mounting	Bolted
Clearing I2t At Rated Voltage	990 kA²s
Melting I2t	170 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	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	155 W
HS Code	85361090
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	690 V

Frequently Asked Questions

What is the Mersen R300234?

The R300234 is a Mersen industrial electrical component identified by its manufacturer-specific reference. Its exact product type and technical ratings should be confirmed using current Mersen documentation.

How can I confirm that the R300234 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 R300234 replace a component with a different reference?

A component with a different part number should only be used when its electrical ratings, physical dimensions, terminals and manufacturer-approved compatibility have been fully verified.

Who should install the Mersen R300234?

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 R300234 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	R300234
Catalogue No	A070UD33LI1000
Description	Square Body High-Speed Fuse Protistor® Size 33 aR 690VAC IEC 700VAC UL 1000A With Striker Slotted Blades long
EAN/UPC Code	3605340325416
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	1000 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	33
Mounting	Bolted
Clearing I2t At Rated Voltage	990 kA²s
Melting I2t	170 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	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	155 W
HS Code	85361090
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	690 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.

LED Controls showroom with electrical products on display

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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