The SMF28A is a surface-mount transient voltage suppressor (TVS) diode with an SOD-123FL package. It has three different voltages available and rated up to 45.4V, 31.1V, and 28V respectively. This product is RoHS compliant and manufactured by Sunmate, a leading designer and supplier of passive and active components. It is suitable for use in a variety of low-power applications, including ESD protection, surge protection, circuit shorting, and fixing transient voltage output problems.