世界上X早的断路器产生于1885年，它是一种刀开头和过电流脱扣器的组合。1905年，具有自由脱扣装置的空气断路器诞生。1930年以来，随着科技的进步，电弧原理的发现和各种灭弧装置的发明，逐渐形成了机构。50年代末，由于电子元件的兴起，又产生了电子脱扣器，到了今天，由于单片机的普及又有了智能型断路器的问世。
常见的有低压断路器和真空断：
低压断路器是用于交流电压1200V，直流电压1500V的电路中起通断、控制或保护等作用的电器。低压断路器是电器工业的重要组成部分，在机械行业中是基础配套件，在配电系统中低压成套开关设备主要由各种低压断路器元件构成，低压断路器的功能及性能对低压成套开关设备起着至关重要的作用。发电设备所发出电能的80%以上是通过低压断路器分配使用的。每增加1万kW发电设备，约需2万件左右的各类低压断路器与之配套。在工业自动化系统中，也需要由低压断路器构成的各种控制屏、控制台、控制器等产品。中国低压断路器行业自1949午后，是在一些修理、装配简单电器工厂的基础上逐步发展成能X立设计、生产的行业，到1979共有生产企业600多家，经过1985～1986年、1990～1991年两个发展高峰，1995年低压断路器行业已有生产企业约1500家。
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NZMN4-VE1600
NZMH4-VE630
NZMH4-VE800
NZMH4-VE1000
NZMH4-VE1250
NZMH4-VE1600
NZMN4-ME550
NZMN4-ME875
NZMN4-ME1400
NZMH4-ME550
NZMH4-ME875
NZMH4-ME1400
NZMN4-4-AE800
NZMN4-4-AE1000
NZMN4-4-AE1250
NZMN4-4-AE1600
NZMH4-4-AE800
NZMH4-4-AE1000
NZMH4-4-AE1250
NZMH4-4-AE1600
NZMN4-4-VE800
NZMN4-4-VE1000
NZMN4-4-VE1250
NZMN4-4-VE1600
NZMH4-4-VE800
NZMH4-4-VE1000
NZMH4-4-VE1250
NZMH4-4-VE1600
NZMN4-AE630-E
NZMN4-AE800-E
NZMN4-AE1000-E
NZMN4-AE1250-E
NZMN4-AE1600-E
NZMH4-AE630-E
NZMH4-AE800-E
NZMH4-AE1000-E
NZMH4-AE1250-E
NZMH4-AE1600-E
NZMN4-VE630-E
NZMN4-VE800-E
NZMN4-VE1000-E
NZMN4-VE1250-E
NZMN4-VE1600-E
NZMH4-VE630-E
NZMH4-VE800-E
