Free Delivery on all orders over £99*

Mercury 5 x 20mm F1.6A Quick Blow Fuse - 250V Fast-Acting

£149
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
We are an Independent UK Company
Price match. Found it cheaper? Contact us
Trade Discount Available
Description

The Mercury F1.6A is a 5 x 20mm glass cartridge fuse rated at 1.6 amps and 250 volts, designed as a fast-acting (quick blow) overcurrent protection device. When current exceeds the 1.6A threshold, the internal wire element melts within milliseconds to break the circuit and protect downstream components from damage caused by overload or short circuit faults.

Used in audio equipment, small power supplies, control panels, instrumentation and consumer electronics where low-current circuits require rapid fault protection, the fuse fits standard 5 x 20mm panel-mount and PCB-mount fuseholders. The glass body allows visual inspection of the element — a broken or discoloured wire indicates the fuse has blown and needs replacement.

The 250V voltage rating makes this fuse suitable for UK mains-fed equipment operating on 230V supply, provided the current draw remains below 1.6A. The nickel-plated brass end caps provide reliable contact with fuseholder terminals and resist corrosion in typical installation environments. IEC compliance ensures the fuse meets international safety standards for construction and performance.

Frequently Asked

What does 'quick blow' mean?

Quick blow (also called fast-acting or F-type) means the fuse responds immediately when current exceeds its rating. This contrasts with time-delay (T-type) fuses, which tolerate brief current surges before blowing. Quick blow fuses protect sensitive electronics that cannot withstand even short overcurrent events.

Can this fuse be used in mains voltage equipment?

Yes, the 250V rating covers UK mains voltage of 230V. However, the 1.6A rating limits this fuse to equipment drawing no more than approximately 368W at 230V (P = V × I). Higher-power equipment requires a higher-rated fuse.

How do I know if the fuse has blown?

The glass body allows you to inspect the internal wire element. If the wire is broken or shows discolouration and burn marks, the fuse has blown and must be replaced with an identical 1.6A 5 x 20mm quick blow type.

What equipment typically uses 1.6A fuses?

Audio amplifiers (particularly low-power valve/tube amps), small bench power supplies, instrumentation, control circuits, and consumer electronics with low current draw commonly use 1.6A fuses for circuit protection.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

See it lit, in person

Lighting looks different in a real room. Come and see our range at our showrooms in Birmingham, Hong Kong and Dubai, or talk to our design team wherever you are.

Niori lighting showroom trailer video with closeups of alabaster lighting

Why Niori

Over 20 years lighting homes worldwide

We are a specialist lighting and mirror retailer with showrooms in Birmingham, Hong Kong and Dubai, shipping to customers around the world. Our own design team is here to help, from first idea to final fitting.

Genuine products

An authorised stockist

Every product arrives brand new with the full manufacturer warranty. Found it cheaper elsewhere? Ask us about a price match.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

Design help

Not sure what you need?

Our design team can help you plan your lighting, share photos and videos of stock, and send samples worldwide. Book a showroom visit in Birmingham, Hong Kong or Dubai, or ask about our lighting design service.

You Might Also Like

Recommended For You

    Our Reviews

    From first click to final installation, our customers share how Niori lights up their spaces. Read their words and envision what’s possible for yours.

    Featured Projects

    Step into our portfolio and see how we transform homes, restaurants, and commercial spaces and more, worldwide. Click here for a closer look at our latest projects.

    Description

    The Mercury F1.6A is a 5 x 20mm glass cartridge fuse rated at 1.6 amps and 250 volts, designed as a fast-acting (quick blow) overcurrent protection device. When current exceeds the 1.6A threshold, the internal wire element melts within milliseconds to break the circuit and protect downstream components from damage caused by overload or short circuit faults.

    Used in audio equipment, small power supplies, control panels, instrumentation and consumer electronics where low-current circuits require rapid fault protection, the fuse fits standard 5 x 20mm panel-mount and PCB-mount fuseholders. The glass body allows visual inspection of the element — a broken or discoloured wire indicates the fuse has blown and needs replacement.

    The 250V voltage rating makes this fuse suitable for UK mains-fed equipment operating on 230V supply, provided the current draw remains below 1.6A. The nickel-plated brass end caps provide reliable contact with fuseholder terminals and resist corrosion in typical installation environments. IEC compliance ensures the fuse meets international safety standards for construction and performance.

    Frequently Asked

    What does 'quick blow' mean?

    Quick blow (also called fast-acting or F-type) means the fuse responds immediately when current exceeds its rating. This contrasts with time-delay (T-type) fuses, which tolerate brief current surges before blowing. Quick blow fuses protect sensitive electronics that cannot withstand even short overcurrent events.

    Can this fuse be used in mains voltage equipment?

    Yes, the 250V rating covers UK mains voltage of 230V. However, the 1.6A rating limits this fuse to equipment drawing no more than approximately 368W at 230V (P = V × I). Higher-power equipment requires a higher-rated fuse.

    How do I know if the fuse has blown?

    The glass body allows you to inspect the internal wire element. If the wire is broken or shows discolouration and burn marks, the fuse has blown and must be replaced with an identical 1.6A 5 x 20mm quick blow type.

    What equipment typically uses 1.6A fuses?

    Audio amplifiers (particularly low-power valve/tube amps), small bench power supplies, instrumentation, control circuits, and consumer electronics with low current draw commonly use 1.6A fuses for circuit protection.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.