This document provides a SPICE model for the 1SS412 general purpose rectifier diode manufactured by Toshiba. It includes: 1) The SPICE subcircuit model with parameters for the 1SS412 diode model. 2) Tables comparing the simulated and measured forward current, capacitance, and reverse recovery characteristics of the diode to validate the model. 3) Diagrams of the test circuits used to measure the diode characteristics. The SPICE model accurately simulates the 1SS412 diode's electrical behavior and can be used in circuit design simulations.