保护标准适用于汽车 AN553 APPLICATION NOTE PROTECTION STANDARDS APPLICABLE TO AUTOMOBILES INTRODUCTION A growing number of sensitive electronic units can be found in motor vehicles. Unfortunately the presence of electrical disturbances threatens their reliability. The objective of this paper is to list all these disruptive factors and to suggest appropriate protection de- vices. Figure 1. Electronic modules in a car GENERAL INFORMATION Simplified diagram of an automotive electrical circuit Coexistence of electromechanical engineering with electronics Figure 2 shows tha……