Fuses do not only interrupt excessive current; it's also important how fast and under what conditions they do so.
This is where the letters printed on them come into play.
| Letter | Abbreviation | English Description | Features and Applications |
|---|---|---|---|
| F | Fast Blow | Fast-Acting Fuse | Blows immediately even with a small current increase. Preferred in sensitive circuits (measuring devices, sensors, microcontrollers). |
| T | Time Delay (Träge) | Time-Delay (Slow Blow) Fuse | Can withstand short-term overcurrent. Used in systems like transformers or motors that draw high current at startup. |
| S | Slow Blow | Slow-Acting Fuse | Similar to T-type but sometimes even more tolerant. Can be used in industrial equipment. |
| H | High Breaking Capacity | High Rupturing Capacity Fuse | Can break high short-circuit currents. Found in power circuits or industrial facilities. |
| J | Time-lag | Time-Lag Fuse | Behaves like T-type, specifically suitable for inductive loads such as motors and transformers. |
Using the wrong type of fuse can damage the system or cause hazardous situations such as fire.
For example, if you use a fast-acting F-type fuse in a motor circuit, it will likely blow immediately due to the high inrush current during the motor’s startup, and the system will fail to operate.
T3.15A H 250V
This can be interpreted as:
T: Time delay (slow-acting)
3.15A: 3.15 Amps
H: High breaking capacity
250V: 250 Volts
This fuse is designed to protect the system against currents exceeding 3.15A over time or sudden major overcurrents in systems up to 250V.
Selecting the correct type and rating of fuse is crucial to ensure safety in your electronic projects.
At Motorobit, we offer a wide range of fuse options:
Fast and slow blow fuses
Glass tube fuses
ANL, blade, and mini automotive fuses
High breaking capacity models for industrial use
👉 Browse now: https://www.motorobit.com/sigorta-ve-yuvalari
Prioritize safety in your projects — protect your system with the correct fuse!
Fuses may look small, but choosing the wrong one can lead to big problems.
By understanding the letters on them, you can choose the correct fuse — ensuring both the protection of your devices and smooth operation of your system.
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