In order to meet the requirements of the pulsed power technology and pulse test technology to the switchers

a triggered device of BaTiO3 high dielectric surface flashover pseudospark switch（PSS） was designed and its triggering characteristics were investigated.The test results indicate that the high-dielectric triggered device shows excellent electric performances of higher electron emitting capability and fast charge injection within the limits of adjusted parameters like gas pressure and applied voltage.At the pressure 7 Pa

the emitted charge is 1.5 μC within 30 nanosecond

the rise time of injection current is about ten nanosecond

the current injection rate reaches to 1.2×1011 A/s and the number of emitted electrons up to 9.4×1012

these make PSS have small delay time and delay jitter.For the hold-off voltage of PSS 28 kV

the lowest voltage of trigger switch drops to 130 V

the corresponding maximum discharging delay time and delay jitter are respectively 100 ns and 25 ns when the gas pressure is 7 Pa.The minimum discharging delay time and delay jitter are less than 35 ns and 6 ns

respectively when the switch voltage is 28 kV.