Microwave Applications Group (MAG) is well known as a supplier of ferrite microwave phase control devices since the 1960’s. U S Air Force AWACS E-3 Sentry aircraft, B-1B Lancer radar and many other programs have used ferrite devices developed, designed, and produced by MAG. Beginning in the 1990’s, we applied our experience to microwave switching devices. These switches use the principle of Faraday rotation to achieve a unique combination of high isolation, wide temperature range, and reciprocal operation at moderately high power levels. The material below gives a broad introduction to the principles involved, followed by examples of switch products currently being delivered. Our design capability extends well beyond these examples, and we invite inquiries regarding other specific applications.