Based on the analysis on test data from surge countercurrent of avalanche rectifier diode,the author puts forward the way to select such diode for alternator and the points for attention in use.

• 通过对雪崩整流二极管反向浪涌电流的测试数据的分析,提出在交流发电机中选择雪崩整流二极管的方法与使用中的注意事项。