  We describe DSiD, a fast simulation Delphes detector for the International
Linear Collider (ILC) based on the full simulation performance of the SiD
detector. SiD is one of two detectors described in the ILC Technical Design
Report (TDR). The tracking efficiency, tracking momentum resolution,
electromagnetic and hadronic calorimeter energy resolution, particle
identification and flavor tagging efficiencies are taken from the Detailed
Baseline Design (DBD) study as described in ILC TDR Volume 4: Detectors. In a
cross-check study with $4 \times 10^6$ $e^+ e^- \rightarrow b \bar{b}$ events
generated at $\sqrt{s}=500$ GeV and simulated by Delphes with the DSiD detector
card, these performance characteristics are measured and found to be
commensurate with the DBD results. For a new physics use case example, we
describe a study of Next-to-Minimal Supersymmetric $e^+ e^- \rightarrow 2
\chi_3 \rightarrow 2\chi_1 2 h_1$ with $h_1 \rightarrow 2a_1$ or $h_1
\rightarrow b\bar{b}$ at the $\sqrt{s}=500$ GeV ILC. The card is available on
HepForge.
