MERSEN FUSE A 070 URD 31 KI 0500 A070URD31KI0500

Q: Is the Y300033 a genuine Mersen reference?

Yes. Y300033 is a Mersen manufacturer reference that should be matched exactly when identifying or sourcing the required component.

High-speed Protistor® fuse engineered for superior short-circuit protection in demanding industrial applications, supporting up to 690V AC (IEC) and 700V AC (UL) with a 500A current rating and striker indication system.

SKU: Y300033Alt SKU: A070UD31KI500MPN: Y300033

List Price £164.10 ex VAT

Your Price (ex VAT)

£164.10

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Manufacturer Lead Time

£164.10

Why Choose the Mersen Y300033 Industrial Electrical Component?

The Mersen Y300033 is a genuine Mersen industrial electrical component intended for maintenance, repair and replacement within compatible electrical protection equipment and assemblies. Specifying the complete manufacturer reference helps engineers and maintenance teams identify the required component accurately and preserve compatibility with the original installation.

Mersen products are widely used in industrial power distribution, machinery, automation and power electronic systems. Genuine replacement components help support dependable operation, correct mechanical installation and continued performance within compatible Mersen equipment.

Detailed public technical data for the Y300033 reference is limited. Its product type, electrical ratings, dimensions, mounting arrangement and equipment compatibility should therefore be verified against the original component label, the associated equipment parts list or current Mersen technical documentation before purchase or installation.

Key Advantages

Genuine Mersen industrial electrical component.
Suitable for compatible maintenance, repair and replacement work.
Manufacturer-specific reference supports accurate product identification.
Helps maintain compatibility with the original electrical assembly.
Designed for use in professional industrial environments.
Supports reliable servicing of compatible Mersen equipment.

Key Features

Mersen manufacturer reference Y300033.
Intended for compatible Mersen equipment and assemblies.
Suitable for industrial maintenance and replacement applications.
Original manufacturer component reference.
Designed for professional electrical installation.
Compatibility should be confirmed before ordering.
Electrical and mechanical specifications must match the original component.
Suitable for use within industrial electrical systems.

Reliable Replacement for Industrial Electrical Equipment

Correct component selection is essential when maintaining industrial electrical systems. Components with a similar appearance may have different voltage ratings, current ratings, operating characteristics, dimensions or connection arrangements, which can affect equipment performance and electrical safety.

The Mersen Y300033 should be selected using its complete manufacturer reference and verified against the original equipment documentation. This helps ensure that the replacement is mechanically suitable, electrically compatible and appropriate for the intended application.

Typical Applications

Industrial electrical control panels.
Power distribution equipment.
Electrical protection assemblies.
Machinery and automation systems.
Maintenance, repair and overhaul operations.
Compatible Mersen industrial equipment.

Technical Specifications

Item number	Y300033
Catalogue No	A070UD31KI500
Description	Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 500A With Striker Slotted Blades short
EAN/UPC Code	3605340322576
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	500 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	31
Mounting	Bolted
Clearing I2t At Rated Voltage	215000 A²s
Melting I2t	37000 A²s
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	Slotted Blades
Product Width	51 mm
Product Length	129 mm
Product Height	56.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.203 kg
Sell Pack Width	157 mm
Sell Pack Length	166 mm
Sell Pack Height	62 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.401 kg
Power Dissipation at Rated Current Value	72 W
HS Code	85361090
Country of Manufacture	France
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	690 V

Frequently Asked Questions

What is the Mersen Y300033?

The Mersen Y300033 is an industrial electrical component intended for maintenance or replacement within compatible Mersen equipment and electrical assemblies.

Is the Y300033 a genuine Mersen reference?

Yes. Y300033 is a Mersen manufacturer reference that should be matched exactly when identifying or sourcing the required component.

How can compatibility be confirmed?

Compatibility should be verified using the original component label, equipment parts list, electrical drawings and current Mersen technical documentation.

Can a similar-looking component be used instead?

A substitute should not be installed unless its electrical ratings, dimensions, mounting arrangement, connections and operating characteristics have been confirmed as fully compatible.

Who should install the Mersen Y300033?

The component should be installed by a suitably qualified electrical professional in accordance with the equipment manufacturer’s instructions and applicable electrical safety requirements.

Trusted Industrial Electrical Protection

Mersen electrical products are widely selected by equipment manufacturers, panel builders and maintenance engineers to support reliable operation and effective protection across demanding industrial electrical systems.

Item number	Y300033
Catalogue No	A070UD31KI500
Description	Square Body High-Speed Fuse Protistor® Size 31 aR 690VAC IEC 700VAC UL 500A With Striker Slotted Blades short
EAN/UPC Code	3605340322576
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	500 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	31
Mounting	Bolted
Clearing I2t At Rated Voltage	215000 A²s
Melting I2t	37000 A²s
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	Slotted Blades
Product Width	51 mm
Product Length	129 mm
Product Height	56.5 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	1.203 kg
Sell Pack Width	157 mm
Sell Pack Length	166 mm
Sell Pack Height	62 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.401 kg
Power Dissipation at Rated Current Value	72 W
HS Code	85361090
Country of Manufacture	France
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.

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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.

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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.

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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

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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.

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

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