Reverse cut-off voltage (Vdrm): 320V Reverse leakage current (Idrm): 5uA Switching voltage (Vs): 400V Holding current (Ih): 120mA On-state voltage (Vt): 4V On-state current (It): 2.2A State capacitance (Co): 48pF DO-214AA/SMB semiconductor discharge tube/detonator 4KV