TMOV14R140M

Series:	iTMOV®
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Maximum AC Volts:	140V
Maximum DC Volts:	180V
Varistor Voltage (Min):	198V
Varistor Voltage (Typ):	220V
Varistor Voltage (Max):	242V
Current - Surge:	6kA
Energy:	55J
Number of Circuits:	1
Capacitance @ Frequency:	900pF @ 1MHz
Operating Temperature:	-55°C ~ 85°C (TA)
Mounting Type:	Through Hole
Package / Case:	Disc 14mm 3-Lead

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TVS - Varistors, MOVs

Transient Voltage Suppressors (TVS) are essential components that help protect electronic equipment from transient voltage that may arise from a variety of sources. The most common type of TVS used in electronic circuits are Varistors, also known as Metal-Oxide Varistors (MOVs). Multiple Varistors, known as Multi-Array Varistors (MAVs) can also be used to increase the reliability and protection level of a circuit. The specific application and working principles of a popular MOV, the TMOV14R140M, will be discussed in this article.The TMOV14R140M is a 14mm diameter MOV designed to provide advanced protection from most typical surges and EMI/RFI transients. It offers a peak pulse power rating of 240W, a peak clamping voltage of 140V and maximum surge current handling of 14 kA. It is capable of handling transients up to 450V, and the MOV is able to reset after each pulse, allowing its protection capability to remain in operation for longer periods of time.The TMOV14R140M is particularly useful in high-voltage applications that require advanced transient protection. Examples of such applications include motor control circuits, power supplies, data lines, and industrial process control systems. The MOV is typically installed in series with the device to be protected. The MOV acts as a protection device, allowing small transients to pass through the MOV, while larger transients are clamped to a predetermined level and eliminated.The MOV operates by using a metal oxide ferroelectric material and a PTC thermistor to create an absorption barrier that basically stops voltage spikes from reaching the protected circuits, ensuring the correct and reliable operation of the devices. When a large voltage spike occurs, the MOVs PTC thermistor is activated, causing it to increase in resistance and absorb the pulse. The absorbed energy is then dissipated as heat, effectively limiting the voltage\'s rise time and reducing destructive power surges from entering the protected device. MOVs can be used in a wide range of applications, but should be used with caution as their operation should always be within their specified operating conditions. Additionally, MOVs should not be used with DC circuits, as the device can be excessively thermally stressed due to its internal design. In conclusion, the TMOV14R140M is an excellent choice for providing advanced protection from most typical transient voltage spikes. Its 14mm diameter allows for easy installation, and its clamping voltage of 140V ensures that it can provide reliable protection to devices exceed peak power ratings of 240W and surge current handling of 14 kA. Despite its simple operation, MOVs should be used with caution as their protection capabilities should always remain within the specified values.

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