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Mercury 5 x 20mm T16A Slow Blow Fuse - 250V Time Delay

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

The Mercury T16A is a 5 x 20mm glass-body cartridge fuse rated at 16 amps and 250 volts, built with time-delay (slow blow) construction to tolerate inrush currents without nuisance tripping. The delay-action element allows brief surges during equipment start-up or motor activation to pass without blowing, while still interrupting sustained overcurrent faults within milliseconds.

Designed for protection in audio equipment, power supplies, amplifiers, motors and control circuits where brief high-current surges occur during normal operation, the T16A suits both industrial and consumer electronics. The standard 5 x 20mm form factor fits most European-spec fuse holders and PCB-mount clips. The glass tube body allows visual inspection of the fuse element without removal.

The fuse carries IEC approval and meets the dimensional and electrical requirements for 5 x 20mm F-rated (fast-acting) and T-rated (time-delay) cartridge fuses. The nickel-plated brass end caps provide reliable contact in standard fuse holders. Each fuse weighs approximately 0.6g and the glass envelope is sand-filled to suppress arc propagation during fault interruption.

Frequently Asked

What's the difference between slow blow and fast blow?

Slow blow (time-delay) fuses tolerate brief inrush currents during equipment start-up without blowing, making them suitable for motors, transformers and power supplies. Fast blow fuses interrupt overcurrent faults immediately and are used where inrush surges do not occur.

Is this fuse suitable for mains voltage equipment?

Yes. The 250V rating covers UK mains voltage (230V) with overhead. However, the 16A rating is higher than typical domestic fuse ratings — verify that 16A is the correct rating for your equipment before fitting.

Can this replace a fast-blow fuse of the same rating?

Not always. Using a slow blow fuse where a fast blow is specified reduces protection speed and may allow damage to occur during fault conditions. Only substitute where the equipment manufacturer specifies a time-delay fuse or where inrush currents cause nuisance blowing with fast-blow fuses.

How is the fuse inspected for failure?

The glass body allows visual inspection. A blown fuse typically shows a broken element and blackening or metallic deposits on the inside of the glass. For confirmation, use a continuity tester or multimeter set to resistance mode.

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 T16A is a 5 x 20mm glass-body cartridge fuse rated at 16 amps and 250 volts, built with time-delay (slow blow) construction to tolerate inrush currents without nuisance tripping. The delay-action element allows brief surges during equipment start-up or motor activation to pass without blowing, while still interrupting sustained overcurrent faults within milliseconds.

    Designed for protection in audio equipment, power supplies, amplifiers, motors and control circuits where brief high-current surges occur during normal operation, the T16A suits both industrial and consumer electronics. The standard 5 x 20mm form factor fits most European-spec fuse holders and PCB-mount clips. The glass tube body allows visual inspection of the fuse element without removal.

    The fuse carries IEC approval and meets the dimensional and electrical requirements for 5 x 20mm F-rated (fast-acting) and T-rated (time-delay) cartridge fuses. The nickel-plated brass end caps provide reliable contact in standard fuse holders. Each fuse weighs approximately 0.6g and the glass envelope is sand-filled to suppress arc propagation during fault interruption.

    Frequently Asked

    What's the difference between slow blow and fast blow?

    Slow blow (time-delay) fuses tolerate brief inrush currents during equipment start-up without blowing, making them suitable for motors, transformers and power supplies. Fast blow fuses interrupt overcurrent faults immediately and are used where inrush surges do not occur.

    Is this fuse suitable for mains voltage equipment?

    Yes. The 250V rating covers UK mains voltage (230V) with overhead. However, the 16A rating is higher than typical domestic fuse ratings — verify that 16A is the correct rating for your equipment before fitting.

    Can this replace a fast-blow fuse of the same rating?

    Not always. Using a slow blow fuse where a fast blow is specified reduces protection speed and may allow damage to occur during fault conditions. Only substitute where the equipment manufacturer specifies a time-delay fuse or where inrush currents cause nuisance blowing with fast-blow fuses.

    How is the fuse inspected for failure?

    The glass body allows visual inspection. A blown fuse typically shows a broken element and blackening or metallic deposits on the inside of the glass. For confirmation, use a continuity tester or multimeter set to resistance mode.

    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.