Profile: KunShan GuoLi Electronic Co., Ltd. specializes in the manufacture of vacuum electrical components. We are an ISO 9001:2000 certified company. Our products include ceramic vacuum relays, vacuum capacitors, ceramic vacuum switching tubes, vacuum switches, hydrogen thyrathon, and other vacuum electrical apparatus. Our products are widely used in national defence, broadcasting & communication, semiconductor RF equipment, coal mines and medical equipment. We have a complete set of advanced inspection & test instruments, and advanced process equipment. Vacuum switching tubes can be sorted by utilization, for breaker, load switches, contactor and for special utilization. Vacuum switching tubes for breakers are capable of breaking short circuit current, which is used in circuit and electric equipment for over loading & short circuit protection. It can break rated short circuit current more than 30 times.