TSV250-184F-2 Circuit Protection

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PTC Resettable Fuses: TSV250-184F-2 Application Field and Working Principle

PTC resettable fuses are a kind of polymer-based components that are designed to limit excessive currents in electronic applications. TSV250-184F-2 is a typical type of PTC resettable fuses. This article aims to explain its application field and working principle in detail.

What is TSV250-184F-2?

TSV250-184F-2 is an overcurrent protection device, a kind of PolySwitch device in which a positive temperature coefficient (PTC) thermistor is used. It acts as an overcurrent protection device to limit excessively high current in applications like over voltage protection, over-temperature protection and reverse current protection. This device is about 20 milliliters long and is the latest range of PTC resettable fuses produced by Cooper Bussmann. It is characterized by low operating voltage (V12V), low resistance (25mΩ) and fast response (0.3 seconds), which makes it very suitable for over-temperature and over-current protection applications.

Application Field of TSV250-184F-2

Typical applications of TSV250-184F-2 include:

• Over voltage protection: PTC resettable fuses are widely used in PC system circuit, as they can provide overvoltage protection by limiting the current to safe levels. It will trip off if the voltage level is exceeded, disconnecting the power supply. It will reset automatically once the voltage returns to the normal range.
• Over-temperature protection: TSV250-184F-2 provides temperature protection to ensure that electronic appliances remain safe and damage-free even in extreme temperatures. It can detect temperature ranges exceeding the normal operating range and trip off to prevent any further damage. It can also reset itself automatically once the temperature returns to an acceptable level.
• Reverse current protection: Reverse current protection is provided by PTC resettable fuses to ensure that electric circuits do not burn out due to incorrect wiring. It can detect and trip off for reverse current situations and reset itself once the situation is corrected.

Working Principle of TSV250-184F-2

PTC resettable fuses work based on the principle of thermistor. This device has a positive temperature coefficient, which means its resistance increases with temperature. When normal current passes through this device, the device will remain active until it reaches the rated temperature, at which point it will trip off and stop the flow of current. Once the temperature drops below the rated level, the fuse will reset automatically and allow the current to flow again.

Thus, PTC resettable fuses act as a current limiter and protect electronic devices from excessive current and abnormally high temperature, providing both over current protection and over-temperature protection.

Conclusion

TSV250-184F-2 is a type of PolySwitch device, a PTC resettable fuse. It is used as overcurrent protection device to limit excessively high current in applications like over voltage protection, over-temperature protection and reverse current protection. It works based on the principle of thermistor, tripping off when the current level and temperature reaches the rated levels. It can then reset automatically, thus protecting electronic components from damage due to overcurrent.

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