MERSEN FUSE 6,9 URD 30 TT F 0400 PC30UD69V400TF

Q: How can the correct Mersen component be identified?

Check the complete B300059 reference and all other markings on the original component against the equipment manual or official manufacturer documentation.

High-speed Protistor® fuse delivering rapid circuit interruption at 400A with robust performance across 690VAC (IEC) and 700VAC (UL) systems. Features aR characteristic, striker indication system, flush ends, and metric threads for reliable industrial power protection.

SKU: B300059Alt SKU: PC30UD69V400TFMPN: B300059

List Price £126.90 ex VAT

Your Price (ex VAT)

£126.90

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Manufacturer Lead Time

£126.90

Why Choose the Mersen B300059 Industrial Electrical Component?

The Mersen B300059 is an industrial electrical replacement component intended for use in compatible power distribution, control and automation equipment. Identified by the manufacturer reference B300059, it allows engineers, panel builders and maintenance teams to source a matching component for existing Mersen-equipped systems.

Selecting a component with the correct manufacturer reference helps maintain the electrical and mechanical compatibility of the original installation. This is particularly important in industrial environments, where an unsuitable replacement can cause installation problems, unreliable operation or unnecessary equipment downtime.

Before ordering or installing the Mersen B300059, its current and voltage ratings, operating characteristics, physical dimensions, terminal arrangement and mounting configuration should be checked against the original product label and the equipment documentation.

Key Advantages

Genuine Mersen industrial electrical component.
Clearly identified by the B300059 manufacturer reference.
Suitable for maintenance, repair and replacement requirements.
Helps preserve compatibility with existing industrial equipment.
Suitable for correctly specified electrical control and power systems.
Manufactured by an established electrical protection specialist.

Key Features

Mersen manufacturer reference B300059.
Industrial-grade electrical component.
Suitable for professional maintenance and replacement applications.
Supports accurate component identification by part number.
Suitable for compatible machinery, control panels and power equipment.
Designed for dependable service in industrial installations.
Electrical ratings should be verified before installation.
Mechanical compatibility should be checked against the original component.

Accurate Replacement for Industrial Electrical Equipment

Industrial electrical systems depend on correctly specified components to maintain safe, dependable operation. Matching the Mersen B300059 reference to the original part helps reduce the risk of unsuitable substitutions and supports a more efficient maintenance process.

The complete product markings should always be checked before installation. In addition to the B300059 reference, users should verify the electrical ratings, dimensions, terminals and mounting arrangement to ensure that the component is suitable for the intended equipment.

Typical Applications

Industrial machinery maintenance and repair.
Electrical control panels and switchgear.
Automation and process control equipment.
Power distribution and conversion systems.
Original equipment replacement programmes.
Industrial maintenance, repair and overhaul operations.

Technical Specifications

Item number	B300059
Catalogue No	PC30UD69V400TF
Description	Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 400A With Striker Flush ends metric threads
EAN/UPC Code	3605340322835
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	400 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	30
Mounting	Bolted
Clearing I2t At Rated Voltage	130 kA²s
Melting I2t	23 kA²s
AC Max I.R./Breaking Capacity	I1: 200 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	40 mm
Product Length	50.6 mm
Product Height	48 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	0.7389 kg
Sell Pack Width	85 mm
Sell Pack Length	135 mm
Sell Pack Height	55 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.2463 kg
Power Dissipation at Rated Current Value	60 W
HS Code	85361090
Country of Manufacture	France
Fuse Type	Semiconductor
Fuse Class	aR
Voltage	690 V

Frequently Asked Questions

What is the Mersen B300059?

The Mersen B300059 is an industrial electrical component identified by its manufacturer part number for use in compatible maintenance, repair and replacement applications.

Can the B300059 be used as a direct replacement?

It may be used as a replacement when its complete part number, electrical ratings, dimensions, terminals and mounting arrangement match the original component.

Which specifications should be checked before installation?

The rated current, rated voltage, operating characteristic, dimensions, terminal arrangement and mounting configuration should all be verified before installation.

Where might the Mersen B300059 be installed?

It may be installed in compatible industrial machinery, control panels, automation equipment and power systems, subject to the original equipment specification.

How can the correct Mersen component be identified?

Check the complete B300059 reference and all other markings on the original component against the equipment manual or official manufacturer documentation.

Trusted Industrial Electrical Components

Mersen components are used by engineers, panel builders and maintenance professionals to support dependable operation across industrial electrical and power management systems.

Item number	B300059
Catalogue No	PC30UD69V400TF
Description	Square Body High-Speed Fuse Protistor® Size 30 aR 690VAC IEC 700VAC UL 400A With Striker Flush ends metric threads
EAN/UPC Code	3605340322835
Rated voltage AC UL	700 V
Rated voltage AC IEC	690 V
Ampere Rating	400 A
RoHS Compliant	Yes
AC or DC	AC
Speed/Characteristic	aR
Fuse Size	30
Mounting	Bolted
Clearing I2t At Rated Voltage	130 kA²s
Melting I2t	23 kA²s
AC Max I.R./Breaking Capacity	I1: 200 kA
Indication System	Yes
Indication System Type	Striker
Connection/Terminal Material	Silver-Plated Brass
Connection/Terminal Type	Flush ends
Product Width	40 mm
Product Length	50.6 mm
Product Height	48 mm
Sell Pack Quantity	3 EA
Sell Pack Weight	0.7389 kg
Sell Pack Width	85 mm
Sell Pack Length	135 mm
Sell Pack Height	55 mm
Product group	Semiconductor Protection Fuses
Body/Insulating Material	Ceramic
Product Weight	0.2463 kg
Power Dissipation at Rated Current Value	60 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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