153-0556-00
The 153-0556-00 is a 2N2501 npn transistor (151-0108-00), selected for high breakdown voltage to operate as a avalanche transistor in the strobe circuits for the S-1 and S-2 sampling heads.
The 153-0556-00 is a 2N2501 npn transistor (151-0108-00), selected for high breakdown voltage to operate as a avalanche transistor in the strobe circuits for the S-1 and S-2 sampling heads.