WHS Series Wirewound High Surge Resistors TT Electronics WHS Wirewound High Surge Resistors offer high surge energy ratings from 2W to 10W. TT Electronics WHS Wirewound High Surge Resistors are available in resistance values up to 330Ω and take energy ratings up to 60J. Designers have greater flexibility with the additional options of radial, goalpost, lancet, and SMD Z-form leads.