MMBT5551G-A MMBT5551G-A-AE3-R MMBT5551G-AE3-R MMBT5551G-B MMBT5551G-B-AE3-R MMBT5551G-C MMBT5551G-C-AE3-6-R MMBT5551G-C-AE3-R MMBT5551-H MMBT5551-HAF