The 1SMA5919BT3G zener diodes from ON Semiconductor is a silicon planar power zener diode suitable for applications requiring a breakdown voltage of 5.6V and power dissipation up to 1.5W. This diode is housed in the SMA package, which has two leads for connection, and is designed for surface mounting due to its small form factor. It is ideal for use in termination, protection, and voltage regulation applications.