The part 331KD07 is a radial leaded varistor manufactured by Liown. It is compliant with RoHS standards and is designed to protect electronic systems from transient voltage. Specifications for this part include a maximum voltage rating of 550V, a maximum power rating of 0.25W, a capacitance of 150pF@1kHz, a maximum voltage of 275V at 23J, a breakdown voltage of 210V, a maximum voltage of 330V, and a maximum peak current of 1.2kA. This part is ideal for applications requiring a varistor rated for high-voltage and high-power protection.