The SFD000040-P19 from Sainty-Tech Communications Limited is a RF Amplifier with Frequency DC to 4 GHz, Gain 20 dB (Linear Gain), Noise Figure 4.9 dB, P1dB 19 dBm, P1dB 0.08 W. Tags: Chip, Power Amplifier. More details for SFD000040-P19 can be seen below.