The SMAF4737A from Jingdao is a Zener diode with a RoHS compliant design. It is designed to provide a low noise, highly reliable, stable voltage reference for many applications, from consumer electronics to automotive applications. The device utilizes a Zener diode with an avalanche voltage of 5.1V, a current range of 5 mA to 25 mA, a power dissipation rating of 500 mW, and a maximum reverse voltage of 75V. The package size of the device is a SMAF type, measuring in at 8.2 × 3.2 mm. It also features a surge peak pulse current of 1.2A.