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Mercury 6 x 32mm T500mA Slow Blow Fuses - 250V

£149
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Description

The Mercury T500mA is a 6 x 32mm glass tube slow blow fuse rated to 250V, designed to protect low-current circuits while tolerating brief inrush current spikes that occur when devices power on. The time-delay element inside the glass tube allows short-duration surges to pass without blowing the fuse, then interrupts the circuit if sustained overcurrent continues beyond the 500mA rating.

Slow blow fuses are commonly used in power supplies, audio equipment, lighting control circuits, battery chargers and any application where motors, transformers or capacitors create momentary inrush current during startup. The 6 x 32mm format fits standard ceramic or inline fuse holders used in mains-powered equipment and low-voltage distribution boards. The 250V rating covers both UK 230V mains and lower-voltage DC applications up to 250V.

The glass tube construction allows visual inspection of the internal wire element — a blown fuse shows a visible break in the wire or discolouration of the glass. Each fuse carries the T500mA rating printed on the metal end cap for identification during replacement. These fuses meet IEC standards for time-delay fuses and are sold in packs suitable for workshop stock or field service use.

Frequently Asked

What does 'slow blow' mean?

A slow blow fuse has a time-delay element that allows brief current surges (such as motor startup or capacitor charging) to pass without blowing. If the overcurrent persists beyond the rated 500mA, the fuse then interrupts the circuit. This contrasts with fast-acting fuses that blow immediately when current exceeds the rating.

What is the difference between T500mA and F500mA?

T-rated fuses are time-delay (slow blow). F-rated fuses are fast-acting and blow immediately when the rated current is exceeded. Use T-rated fuses in circuits with inrush current; use F-rated fuses in circuits requiring immediate protection.

What equipment uses 6 x 32mm fuses?

This format is common in audio amplifiers, power supplies, battery chargers, lighting control gear, and low-voltage distribution boards. Check your equipment's fuse holder or manual to confirm the required size and rating before replacing.

Can these be used in DC circuits?

Yes. The 250V rating applies to both AC mains (230V) and DC circuits up to 250V. The fuse interrupts current in the same way regardless of whether the voltage is AC or DC.

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.

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    Description

    The Mercury T500mA is a 6 x 32mm glass tube slow blow fuse rated to 250V, designed to protect low-current circuits while tolerating brief inrush current spikes that occur when devices power on. The time-delay element inside the glass tube allows short-duration surges to pass without blowing the fuse, then interrupts the circuit if sustained overcurrent continues beyond the 500mA rating.

    Slow blow fuses are commonly used in power supplies, audio equipment, lighting control circuits, battery chargers and any application where motors, transformers or capacitors create momentary inrush current during startup. The 6 x 32mm format fits standard ceramic or inline fuse holders used in mains-powered equipment and low-voltage distribution boards. The 250V rating covers both UK 230V mains and lower-voltage DC applications up to 250V.

    The glass tube construction allows visual inspection of the internal wire element — a blown fuse shows a visible break in the wire or discolouration of the glass. Each fuse carries the T500mA rating printed on the metal end cap for identification during replacement. These fuses meet IEC standards for time-delay fuses and are sold in packs suitable for workshop stock or field service use.

    Frequently Asked

    What does 'slow blow' mean?

    A slow blow fuse has a time-delay element that allows brief current surges (such as motor startup or capacitor charging) to pass without blowing. If the overcurrent persists beyond the rated 500mA, the fuse then interrupts the circuit. This contrasts with fast-acting fuses that blow immediately when current exceeds the rating.

    What is the difference between T500mA and F500mA?

    T-rated fuses are time-delay (slow blow). F-rated fuses are fast-acting and blow immediately when the rated current is exceeded. Use T-rated fuses in circuits with inrush current; use F-rated fuses in circuits requiring immediate protection.

    What equipment uses 6 x 32mm fuses?

    This format is common in audio amplifiers, power supplies, battery chargers, lighting control gear, and low-voltage distribution boards. Check your equipment's fuse holder or manual to confirm the required size and rating before replacing.

    Can these be used in DC circuits?

    Yes. The 250V rating applies to both AC mains (230V) and DC circuits up to 250V. The fuse interrupts current in the same way regardless of whether the voltage is AC or DC.

    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.