LS Series LED Push Button Switches Well Buying LS Series LED Push Button Switches feature 40mΩ (@1.5VDC) maximum contact resistance and 100MΩ (@500VDC) minimum insulation resistance. These switches are available with bi-color LED illumination and offer a Single Pole Single Throw (SPST) lock/non-lock function. The LS Series push button switches incorporate momentary and lock types with LED pole positions with 36VDC, 0.2A contact rating. These switches offer 10000 operating life cycles with 2.2±0.3mm full travel and 1.6±0.3mm contact travel. Typical applications include computer products, office appliances, and communication equipment.