按主觸點連接回路的形式分為：直
接觸器（圖5）
接觸器（圖5）
流接觸器、交流接觸器。
按操作機構分為：電磁式接觸器、永磁式接觸器。
永磁交流接觸器是利用磁極的同性相斥、用永磁驅動機構取代傳統的電磁鐵驅動機構而形成的一種微功耗接觸器國內成熟的產品型號：CJ20J、NSFC1、NSFC2、NSFC3、NSFC4、NSFC5、NSFC12、NSFC19、CJ40J、NSFMR。3TH42441XA4
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交流接觸器利用主接點來控制電路，
用接點來導通控制回路。
主接點一般是常開接點，而接點常有兩對常開接點和常閉接點，小型的接觸器也經常作為中間繼電器配合主電路使用。
交流接觸器的接點，由銀鎢合金制成，具有良好的導電性和耐高溫燒蝕性。
交流接觸器動作的動力源于交流通過帶鐵芯線圈產生的磁場，電磁鐵芯由兩個「山」字形的幼硅鋼片疊成，其中一個固定鐵芯，套有線圈，工作電壓可多種選擇。為了使磁力穩定，鐵芯的吸合面加上短路環。交流接觸器在失電后，依靠彈簧復位。
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