A momentary switch of miniature size having a block of dielectric material providing a substrate and a pair of circuit paths defined by uninsulated wires mounted to the block, the ends of the wires forming switch poles, a resilient spring made from a wire mounted on the block, one end of the resilient spring normally engaged on a first switch pole, and a plunger reciprocatingly received in an opening of said block and displaceable into engagement on the spring to urge it forcefully into engagement with the second pole in opposition to the resilient action of said spring to interrupt a first electrical circuit through one of the wires and to complete a second electrical circuit through the second wire.