IMS offers S-Parameter data on most of our product lines.  You can find measured and tested S-Parameter data for the N-Series, RCX Series and IMA series through our website.  For simulated S-Parameter information, contact us at techsupport@ims-resistors.com or fill out our online S-Parameter form and one of our engineers will respond to you shortly. We are able to provide the requested data in .snp file format for your use.