2N2221A, L, UA, UB & 2N2222A, L, UA, UB Radiation.
2N2222L - Radiation Hardened NPN Silicon Switching Transistors
2N2221A, L, UA, UB & 2N2222A, L, UA, UB Radiation Hardened NPN Silicon Switching Transistors Rev. V1 Features Qualified to MIL-PRF-19500/255 Le.