2SC1815 GR档(200400) 2SC1815 HF 2SC1815 HF 200-400 2SC1815 HF SOT-23 2SC1815 HF-23 2SC1815 L6 2SC1815 PBFREE 2SC1815 TIN/LEAD 2SC1815 TRE PBFREE 2SC1815 TRE TIN/LEAD