The 1111 (S42E) E-Series from Johanson Technology is a RF Capacitor with Capacitance 0.2 to 1000 pF, Frequency 1 kHz to 1 MHz, Q Factor 1000 to 10000, Dielectric Strength 500 to 1500 V, Voltage (WVDC) 200 to 1500 V. Tags: High Q Capacitors, Ceramic Capacitors, MLCC. More details for 1111 (S42E) E-Series can be seen below.