Newnes Dictionary of Electronics

S

saddle coils Coils for magnetic deflection, usually of rectangular form and shaped so as to fit the neck of a cathode ray tube.

safe operating area An area on the collector voltage-collector current characteristics of a power transistor within which the operating point should be located to avoid any possibility of overstressing the device. For safe operation of the transistor, the collector current and the collector voltage must not exceed certain values. Moreover the collector dissipation must be kept below a certain limit to avoid overheating. A fourth limit is set by the need to avoid second breakdown (caused by the emitter current concentrating in a particular small area of the junction). To avoid all these limits the values of I_c