HE8550-E-T92-K HE8550G HE8550G SOT-89 T/R HE8550G/UTC HE8550G-C-AB3-R HE8550G-C-AE3-R HE8550G-D HE8550G-D-AB3-R HE8550G-D-AE3-R HE8550G-D-T92-B