Crystal products after years of careful research and development of science and technology, on the basis of the three side NEC fuse developed patch triad fuse, in many series of battery protection, communications equipment have very good effect.Currently, except for SONNY JPET is second on the basis of independent patent knowledge, launched this patch fuses, maximum current can reach 30 a, product post some more convenient than the use of NEC, more can be widely used in the relatively small size of the product, greatly save space, use SMT higher efficiency than manual welding.