MERSEN FUSE NH 1 125A 500V GG SGL NH12GG50V125-1

Q: What is the current rating of this fuse?

The NH12GG50V125-1 has a rated current of 125 A.

Q: What supply voltage is this fuse designed for?

This fuse is rated for operation on systems up to 500 V AC and 250 V DC.

Mersen NH12GG50V125-1 DIN NH1 gG fuse link rated at 125 A, 500 V AC with isolated gripping lugs and front and top indicator for industrial circuit protection.

SKU: NH12GG50V125-1Alt SKU: NH12GG50V125-1MPN: D216203

List Price £18.04 ex VAT

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£18.04

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Manufacturer Lead Time

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Why Choose the Mersen NH12GG50V125-1 NH Fuse Link?

The Mersen NH12GG50V125-1 is a premium DIN NH gG low voltage fuse link engineered to provide dependable protection for industrial power distribution systems, switchgear and electrical equipment. Manufactured by Mersen, this fuse link delivers full-range overcurrent and short-circuit protection, helping to safeguard cables, feeders and electrical installations operating under demanding conditions.

Designed with a 125 A rated current, 500 V AC operating voltage and a Size NH1 body, the NH12GG50V125-1 complies with IEC and DIN standards for low voltage fuse protection. Its front and top indicator system with isolated gripping lugs allows maintenance engineers to quickly identify an operated fuse while improving replacement safety.

The NH12GG50V125-1 is ideally suited for industrial switchboards, distribution panels, machine control systems and commercial electrical installations where reliable circuit protection and high breaking capacity are essential.

Key Advantages

Industrial DIN NH gG fuse link for comprehensive circuit protection.
125 A current rating suitable for power distribution applications.
500 V AC rated voltage for industrial electrical systems.
Full-range gG protection against overloads and short circuits.
Front and top indicator enables rapid fuse status identification.
Isolated gripping lugs improve maintenance safety.

Key Features

Mersen NH gG fuse link series.
Catalogue number: NH12GG50V125-1.
NH1 fuse size.
125 A rated current.
500 V AC rated voltage.
250 V DC rated voltage.
120 kA breaking capacity.
Front and top blown fuse indicator.
Isolated gripping lugs.
Compliant with IEC and DIN NH standards.

Reliable Protection for Industrial Power Systems

The gG utilisation category provides complete protection against overloads and short circuits, making the NH12GG50V125-1 suitable for protecting cables, conductors, switchgear and general electrical equipment. Its high interrupting capacity helps minimise equipment damage and improve electrical system reliability.

Mersen NH fuse links are widely specified by panel builders, electrical contractors and industrial maintenance engineers thanks to their proven reliability, international approvals and consistent performance in demanding environments.

Typical Applications

Industrial power distribution systems.
Electrical switchboards.
Distribution panels.
Machine control panels.
Cable and feeder protection.
Commercial and industrial electrical installations.

Technical Specifications

Current	125 A
Voltage	500 V
Manufacturer	Mersen
Series	NH gG Fuse Links
Model	NH12GG50V125-1
Product type	DIN NH fuse link
Fuse size	NH1
Utilisation category	gG
Rated current	125 A
Rated AC voltage	500 V AC
Rated DC voltage	250 V DC
Breaking capacity	120 kA
Indicator	Front and top indicator
Gripping lugs	Isolated
Dimensions (L × W × H)	Approx. 135 × 39.5 × 52.5 mm
Standards	IEC 60269, DIN 43620
RoHS compliant	Yes
Device Type	Fuse link
Fuse Type	NH (DIN)
Fuse Size	NH1
Fuse Class	gG

Frequently Asked Questions

What is the Mersen NH12GG50V125-1 used for?

This NH fuse link protects industrial electrical circuits, cables and equipment from overloads and short circuits.

What is the current rating of this fuse?

The NH12GG50V125-1 has a rated current of 125 A.

What supply voltage is this fuse designed for?

This fuse is rated for operation on systems up to 500 V AC and 250 V DC.

What does the gG classification mean?

The gG utilisation category provides full-range protection against both overload and short-circuit faults for general-purpose electrical circuits.

What is the benefit of the front and top indicator?

The integrated indicator makes it easy to identify when the fuse has operated, helping reduce maintenance time and improve servicing efficiency.

Trusted for Industrial Circuit Protection

Mersen NH fuse links are trusted worldwide by electrical engineers, OEM manufacturers and panel builders to deliver reliable protection for industrial power distribution and electrical infrastructure.

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

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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.

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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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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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