V275LT10

Varistor Voltage (Typ):	430V
Package / Case:	Disc 10mm
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 85°C (TA)
Capacitance @ Frequency:	200pF @ 1MHz
Number of Circuits:	1
Energy:	45J
Current - Surge:	2.5kA
Varistor Voltage (Max):	473V
Series:	LT
Varistor Voltage (Min):	387V
Maximum DC Volts:	369V
Maximum AC Volts:	275V
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

A V275LT10 is a voltage varistor, also known as a Metal Oxide Varistor (MOV). MOVs are voltage-dependent resistors designed to protect circuits from large surges in voltage. The V275LT10 is specially designed for applications requiring high pulsed current/voltage and low capacitance and leakage current.

Application Field of V275LT10

The V275LT10 is suitable for all applications requiring protection from fast transients and surges, including isolated systems, power supplies, telecommunications equipment, low-voltage distribution, and high-voltage applications. It can offer isolation up to 600V, withstanding voltage up to 1.5KV, and is suitable for protecting against non-repetitive pulses up to 20A. A notable application for the V275LT10 is its use in Smart Metering equipment, where its low leakage current and low capacitance make it ideal for isolating the current, voltage, and signal circuits.

Working Principle

The V275LT10 works by relieving the excess voltage or current during an overload situation, diverting it to ground. It consists of metal oxide layers which are formed by sintering material, encased in a ceramic body. The core of the MOV contains metal oxide granules which are bonded together and form a resistor. The resistor has a highly nonlinear resistance curve which changes when the voltage at its terminals rises above a certain level. When the voltage reaches the breakdown point, the granules are instantly degraded and the resistance plummeting, thereby diverting the energy away from the protected device or circuit. The ceramic body acts as a faraday cage which helps to ensure the energy is discharged safely to the ground.The varistor can be used to protect against fast transients, such as lightning strikes, and slower power surges. It is also useful for noise filtering. A high value of peak pulse current and low value of leakage current make it highly suitable for use in Smart Meters and other similar applications.

Conclusion

The V275LT10 is an excellent voltage varistor for a range of applications. With its high pulsed current/voltage rating, low capacitance, and low leakage current, it is ideal for noise filtering, power supply protection, telecommunications equipment, and digital meters. Its ability to dissipate energy safely to ground make it perfect for isolating current, voltage, and signal circuits.

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