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5x20mm Glass Fuse 1A 250V Slow Blow – M205 Time Delay Cartridge Fuse

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5x20mm Glass Fuse 1A 250V Slow Blow - M205 Time Delay Cartridge Fuse

Brand NZN Electronics CLICK IT SKU CLICK-IT-710762 Category Home & Kitchen

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  • Brand NZN Electronics

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Overview

A 1A slow-blow (time-delay) glass fuse in the common 5x20mm size, also called M205. A slow-blow fuse rides through the short surge a motor, transformer or power supply draws at switch-on, then opens on a sustained overload or short. Use it where the equipment calls for a T fuse, or where a fast fuse of the same rating keeps blowing at switch-on with no fault present. For electronics with no switch-on surge, the 1A fast-blow version opens quicker.

Specifications

Size5 x 20mm (M205) cartridge
Current rating1A
Voltage rating250V maximum, fine on any lower voltage
SpeedTime-lag (T), also called slow blow or time delay
Switch-on surgesRides through short motor, transformer and capacitor inrush
Normal running currentUp to about 0.75A for a fuse that lasts
BodyClear glass tube, fuse wire with a solder bead
Fits5x20mm panel holders, inline holders and PCB fuse clips
PolarityNone, fits either way round

Full technical datasheet, marking guide and fuse selection guide
PDF

What’s in the box

5+
1A 5x20mm slow-blow glass fuses

Sold per fuse with a minimum of 5. You receive the quantity you order, loose in a clear bag.

Great for

Replacing a blown T1A fuse in a power supply, amplifier or appliance
Fusing a small 12V motor, pump or fan that surges at start-up
The primary side of a small transformer
Project boxes with a panel-mount fuse holder
Inline fuse holders on car and caravan accessories
Keeping spares in the toolbox for 5x20mm holders

Wiring & getting started

  1. Check the size and rating

    Measure the old fuse: 20mm long and 5mm across is this size. Replace like with like: the same current, the same speed (T for slow, F for fast) and a voltage rating at least as high as the circuit.

  2. Slow or fast?

    Choose slow-blow for loads that surge at switch-on: motors, transformers and power supplies with big capacitors. Where the equipment specifies an F fuse, fit the fast version, because a slow fuse lets a fault run for longer.

  3. Fit it in a holder

    Use a 5x20mm fuse holder in the positive or active line, as close to the power source as you can. Turn the power off before changing a fuse.

  4. Checking a blown fuse

    A blown fuse has a broken wire or a darkened, smoky glass. A dark glass means a hard short, so find the fault before you fit a new one.

Note: Glass fuses suit electronics and low-voltage DC work. When replacing a fuse inside mains equipment, match the original exactly; if it was a ceramic or sand-filled fuse, use the same type, not glass.

Specification

Specification for 5x20mm Glass Fuse 1A 250V Slow Blow - M205 Time Delay Cartridge Fuse
CLICK IT SKU CLICK-IT-710762
Brand NZN Electronics

Features

A 1A slow-blow (time-delay) glass fuse in the common 5x20mm size, also called M205. A slow-blow fuse rides through the short surge a motor, transformer or power supply draws at switch-on, then opens on a sustained overload or short. Use it where the equipment calls…

  • Brand NZN Electronics

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