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Mercury 6 x 32mm T12A Slow Blow Fuses - 250V

£149
The RRP is the manufacturer's recommended retail price of the item.
Limited Stock
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Description

The Mercury T12A is a 6 x 32mm slow blow fuse rated at 12 amps and 250 volts, designed to tolerate short-term power surges without breaking the circuit. The slow blow characteristic delays the fuse response during momentary overloads, making it suitable for motors, transformers, power supplies and other inductive loads that draw higher current during startup than during normal running.

These fuses are commonly used in audio equipment, PA systems, broadcast installations and industrial control panels where equipment startup generates a brief inrush current that would trip a fast-acting fuse. The 6 x 32mm glass cartridge format fits standard fuse holders in mains plugs, equipment chassis panels and distribution boards across the UK and Europe. IEC certification confirms the fuse meets international safety standards for rated breaking capacity.

The transparent glass body allows visual inspection of the fuse element without removal from the holder. Once a fuse has blown, the internal wire will appear broken or discoloured. The nickel-plated brass end caps ensure good contact in the fuse holder and resist corrosion in damp environments. Each fuse is stamped with the T12A rating on the end cap for identification during replacement.

Frequently Asked

What does slow blow mean?

Slow blow fuses tolerate brief current surges above the rated amperage without blowing, giving inductive loads time to complete their startup cycle. A fast-acting fuse of the same rating would blow during the same surge. This makes slow blow fuses necessary for motors, transformers and similar equipment.

Where is this fuse typically used?

The 6 x 32mm T12A is a standard size in audio equipment, PA amplifiers, powered speakers, broadcast gear and industrial control panels. It fits the same holders as F-rated (fast-acting) fuses of the same physical size, so replacement requires matching both the amperage and the time delay characteristic.

Can this replace a fast-acting 12A fuse?

Physically it will fit, but substituting a slow blow for a fast-acting fuse removes an important safety margin. Fast-acting fuses are specified where immediate circuit breaking is required. Only replace with a slow blow fuse if the equipment manufacturer specifies a T-rated or time-delay fuse in that position.

How do I know when the fuse has blown?

The internal wire element will appear broken or heavily discoloured when viewed through the glass body. If the element looks intact and silver-grey, the fuse is likely still functional. A multimeter set to continuity mode will confirm whether the fuse is open or closed circuit.

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 T12A is a 6 x 32mm slow blow fuse rated at 12 amps and 250 volts, designed to tolerate short-term power surges without breaking the circuit. The slow blow characteristic delays the fuse response during momentary overloads, making it suitable for motors, transformers, power supplies and other inductive loads that draw higher current during startup than during normal running.

    These fuses are commonly used in audio equipment, PA systems, broadcast installations and industrial control panels where equipment startup generates a brief inrush current that would trip a fast-acting fuse. The 6 x 32mm glass cartridge format fits standard fuse holders in mains plugs, equipment chassis panels and distribution boards across the UK and Europe. IEC certification confirms the fuse meets international safety standards for rated breaking capacity.

    The transparent glass body allows visual inspection of the fuse element without removal from the holder. Once a fuse has blown, the internal wire will appear broken or discoloured. The nickel-plated brass end caps ensure good contact in the fuse holder and resist corrosion in damp environments. Each fuse is stamped with the T12A rating on the end cap for identification during replacement.

    Frequently Asked

    What does slow blow mean?

    Slow blow fuses tolerate brief current surges above the rated amperage without blowing, giving inductive loads time to complete their startup cycle. A fast-acting fuse of the same rating would blow during the same surge. This makes slow blow fuses necessary for motors, transformers and similar equipment.

    Where is this fuse typically used?

    The 6 x 32mm T12A is a standard size in audio equipment, PA amplifiers, powered speakers, broadcast gear and industrial control panels. It fits the same holders as F-rated (fast-acting) fuses of the same physical size, so replacement requires matching both the amperage and the time delay characteristic.

    Can this replace a fast-acting 12A fuse?

    Physically it will fit, but substituting a slow blow for a fast-acting fuse removes an important safety margin. Fast-acting fuses are specified where immediate circuit breaking is required. Only replace with a slow blow fuse if the equipment manufacturer specifies a T-rated or time-delay fuse in that position.

    How do I know when the fuse has blown?

    The internal wire element will appear broken or heavily discoloured when viewed through the glass body. If the element looks intact and silver-grey, the fuse is likely still functional. A multimeter set to continuity mode will confirm whether the fuse is open or closed circuit.

    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.