4.5×4.5 mm top actuated tact switch SMD SMT . Replacement parts TL3315NF100Q TL3315NF160Q TL3315NF250Q 223BM2VBCR 223BM1VACR 223BM1VABR 223BM2VBBR 223BM2VACR 223BM2VBAR 223BM1VAAR 223BM2VAAR 223BM2VABR 430151005826 430181005816 RKA2SGG055SMTR LFS RKA2SGM055SMTR LFS RKA2SGK055SMTR LFS RKA2SGS055SMTR LFS RKA2SGS055SMTR LFS RKA2SGK055SMTR LFS RKA2SGM055SMTR LFS