DIN1 Series Transient Voltage Surge Suppressors deliver worry- free performance with an innovative and proven technology design. All models provide surge and sag protection against harmful transient voltages and high-frequency noise that exceed the nominal operating voltage of AC and DC critical dedicated control loads. Ideal for protecting PLCs, fire-alarm panels, motion control systems, electric access readers, POS hardware, building management systems and other microprocessor based loads. The DIN1 Series unit is installed/connected in either Series or Parallel with the line and the equipment to be protected. The DIN1 contains no line/load sensitive components and therefore can be connected in any orientation.