The XT9M20ANA4M is a NTC inrush current limiter manufactured by Vishay. It is a negative temperature coefficient (NTC) thermistor with a low resistance value. This product helps protect circuits and components against high inrush current when power is initially applied. It is ideal for use in electronic components and devices, such as inverters, ballasts and transformers. This specific model is surface mountable, and has a maximum rated voltage of 250 VAC. It also has a maximum dissipation power rating of 0.0053 W, with a tolerance range of ±10%.