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What is a fuse T5AL?
A T5AL is a tubular 5 amp 20mm x 5mm Slow Blow Anti Surge glass fuse.
What is the meaning of the number 15 on a fuse or circuit breaker?
This is the amount of current that the wire in the fuse will "fuse" or open. and the Breaker will trip. Having said that, the time it takes to blow will depend on how close to the max the current is. If you put 13 amps on a 15 amp fuse, it will get hot enough to blow eventually. No fuse or breaker should have more than 80% load.
Can fast blow fuse used in place of slow blow fuse?
No. A slow blow fuse is intended to survive a short overload from the startup of a piece of equipment, usually a motor or power supply. If you use a fast blow fuse in this application, it will tend to blow unexpectedly.Motors usually pull four times their rated running current on startup, but only for a very short period of time. The slow blow fuse, or slow trip circuit breaker, is designed to handle this. Similarly, power supplies need to charge the primary filter capacitor from zero voltage in one line cycle on startup. Worst case is turning on the power switch at the peak of the line cycle. Inductance of the transformer (if present) and dynamic resistance of the diode mitigates this, but there is still a larger than normal current transient. Again, the slow blow protective device allows this in the short term.Hy i'm GbRlEuEeN, i used f10a(fast) fuse to replace t5a fuse(slow) but was on audio sistem(subwoofer) and i will change back as soon il get the t5a. ( i tryed f5a first but blowed instant at power up.
How do you know when a slow blow fuse is bad?
There's really no general way of knowing, it's all down to how sensitive the equipment the fuse is hooked up to is. There should be recommendations on what type of fuse to use.
Thermal fuse will blow when the temperature exceeds the rated temperature of the fuse. Can a thermal fuse exceed its lifespan and blow or malfunction other than temperature exceeding rating?
It's possible. I'd be wary assuming this is the problem. If you can replace with an identical thermal fuse and test, I would. It is very likely you have an overheating issue, though. Clean whatever the fuse is meant to protect thoroughly. If this is in a light fixture, i would be tempted to replace with a lower energy light bulb.
